阅读说明：本技术 光学镜头及其组装方法和防裂方法 (Optical lens, assembling method thereof and anti-cracking method ) 是由 张志强 于 2018-08-29 设计创作，主要内容包括：本发明公开了一光学镜头及其组装方法和防裂方法,其中所述光学镜头包括至少一镜片和一镜筒,其中所述镜筒具有一装配空间、用于界定所述装配空间的一内壁以及分别在所述镜筒的两个端部连通所述装配空间的一进光口和一出光口,其中所述镜片被组装于所述镜筒的所述装配空间,并且在所述镜片的外壁和所述镜筒的所述内壁之间形成至少一装配间隙。(The invention discloses an optical lens, an assembling method thereof and an anti-cracking method, wherein the optical lens comprises at least one lens and a lens barrel, wherein the lens barrel is provided with an assembling space, an inner wall used for defining the assembling space, and a light inlet and a light outlet which are respectively communicated with the assembling space at two ends of the lens barrel, the lens is assembled in the assembling space of the lens barrel, and at least one assembling gap is formed between the outer wall of the lens and the inner wall of the lens barrel.)

1. An optical lens, comprising:

at least one lens; and

a lens barrel, wherein the lens barrel has an assembly space, an inner wall for defining the assembly space, and a light inlet and a light outlet respectively communicating the assembly space at both ends of the lens barrel, wherein the lens is assembled in the assembly space of the lens barrel, and at least one assembly gap is formed between an outer wall of the lens and the inner wall of the lens barrel.

2. The optical lens according to claim 1, wherein the lens includes an imaging body and a mounting body extending from the imaging body, the lens is mounted in the fitting space of the lens barrel in such a manner that the mounting body and the inner wall of the lens barrel are fitted to each other, and the fitting gap is formed between an outer wall of the mounting body and the inner wall of the lens barrel.

3. An optical lens according to claim 2, wherein the outer wall of the mounting body of the lens is made up of a plurality of successive planes with angles between adjacent planes.

4. The optical lens of claim 3 wherein the imaging body and the mounting body of the optic have the same axis of symmetry and the imaging body and the mounting body have the same center.

5. An optical lens according to claim 4, wherein the mounting body of the lens is a regular polygonal structure.

6. An optical lens according to claim 4, wherein the planes of the outer walls of the mounting bodies constituting the lenses have different lengths.

7. An optical lens according to claim 5, wherein the number of planes constituting the outer wall of the mount body of the lens is equal to or greater than six.

8. The optical lens according to claim 2, wherein adjacent faces constituting the outer wall of the mount body respectively have different curvatures.

9. The optical lens of claim 2, wherein the mounting body includes a mounting portion and at least one mounting protrusion, and the mounting body has at least one mounting groove, the mounting portion extending outwardly from the imaging body, the mounting protrusion extending outwardly from the mounting portion and forming the mounting groove between adjacent mounting protrusions.

10. An optical lens according to claim 9, wherein the mounting bosses are evenly spaced around the mounting portion.

11. An optical lens according to claim 10, wherein the mounting protrusions are symmetrically distributed around the mounting portion.

12. The optical lens as claimed in claim 10, wherein the number of the mounting protrusions is equal to or greater than three.

13. An optical lens according to any one of claims 2 to 12, wherein the inner wall of the barrel is formed by a plurality of continuous planes, and an included angle exists between adjacent planes.

14. The optical lens according to claim 13, wherein a cross-sectional shape of the inner wall of the lens barrel has the same axis of symmetry as the lens placed laterally within the fitting space.

15. The optical lens according to claim 14, wherein a cross section of the inner wall of the lens barrel is a regular polygon.

16. The optical lens according to claim 14, wherein planes constituting the inner wall of the lens barrel have different lengths.

17. The optical lens according to claim 15, wherein the number of planes constituting the inner wall of the lens barrel is equal to or greater than six.

18. The optical lens according to claim 2, wherein adjacent surfaces of the inner walls constituting the lens barrel respectively have different curvatures.

19. The optical lens barrel according to any one of claims 2 to 12, wherein the lens barrel includes a barrel body and at least one fitting projection, and the lens barrel has at least one fitting groove, the fitting projection extending from the barrel body and forming the fitting groove between adjacent ones of the fitting projections.

20. The optical lens according to claim 19, wherein the fitting protrusions are evenly distributed at intervals on a circumference of the barrel body.

21. The optical lens according to claim 19, wherein the fitting protrusions are symmetrically distributed on a periphery of the barrel body.

22. The optical lens of claim 20, wherein the number of fitting projections is equal to or greater than three.

23. An optical lens according to any one of claims 2 to 22, wherein the optical lens further comprises a layer covering the imaging subject of the lens.

24. An imaging apparatus, comprising:

at least one optical lens according to claims 1 to 23; and

and the photoelectric conversion unit comprises a photosensitive chip, and the optical lens is held in a photosensitive path of the photosensitive chip.

25. An automobile with an imaging device, comprising:

an automobile body; and

an imaging device, wherein the imaging device is mounted to the automobile body, and the imaging device includes at least one optical lens according to claims 1 to 23 and a photoelectric conversion unit, wherein the photoelectric conversion unit includes a photosensitive chip, and the optical lens is held in a photosensitive path of the photosensitive chip.

26. An assembling method of an optical lens, the assembling method comprising the steps of:

(a) providing a lens barrel with an assembly space, and a light inlet and a light outlet which are communicated with the assembly space; and

(b) assembling the lens on the lens barrel in a manner that at least one assembling gap is formed between the outer wall of the lens and the inner wall of the lens barrel so as to assemble the optical lens.

27. An anti-cracking method for a film layer of an optical lens is characterized by comprising the following steps: at least one assembling gap is formed between a lens and a lens barrel, so that when the lens barrel and the lens deform due to the fact that the optical lens is heated, the assembling gap is used for preventing the lens barrel from exerting extrusion force on the whole outer wall of the lens, and therefore the film layer covered on the lens is prevented from cracking.

Technical Field

The invention relates to the field of optics, in particular to an optical lens, an assembling method and an anti-cracking method thereof.

Background

In recent years, optical lenses are widely applied to various industries, particularly in the automobile industry, vehicle-mounted lenses play a great role in safe driving as eyes of automobiles, a firm foundation is laid for rapid development of advanced technologies such as intelligent driving and unmanned driving in the automobile industry, and the stability and definition of optical imaging of the vehicle-mounted lenses are more important for guaranteeing driving safety.

Referring to fig. 1A of the specification, a conventional vehicle-mounted lens includes an optical lens 10P and a lens barrel 20P, and the optical lens 10P is stably mounted in a mounting space 22P of the lens barrel 20P by attaching an outer wall 11P of the optical lens 10P to an inner wall 21P of the lens barrel 20P. The vehicle-mounted camera module is applied to an automobile, and the vehicle-mounted camera module monitors the automobile and the surrounding environment in real time in the running process of the automobile, so that the safe running of the automobile can be guaranteed. However, in an actual application process, the service environment of the vehicle-mounted lens is often severe, and a number of defects existing in the conventional vehicle-mounted lens are gradually exposed. Particularly, in a high-temperature environment, the defects of the conventional vehicle-mounted lens are more obvious.

First, referring to fig. 1B, the conventional onboard lens is placed in a high temperature environment, and according to the principle of thermal expansion and contraction, the optical lens 10P and the lens barrel 20P of the onboard lens under high temperature both expand, but because the lens barrel 20P of the optical lens 10P is made of different materials, that is, the thermal expansion coefficients of the optical lens 10P and the lens barrel 20P are different, the optical lens 10P is subjected to the squeezing force of the lens barrel 20P, and once the onboard lens is placed in the high temperature environment for a long time, the force of the lens barrel 20P on the optical lens 10P is likely to cause the optical lens 10P to deform. Once the thermal deformation of the optical lens 10P exceeds the normal range, the thermal deformation of the mirror surface, i.e. the optical surface, of the optical lens 10P may cause the imaging blur of the vehicle-mounted lens, thereby affecting the normal use of the vehicle-mounted lens.

Next, the outer wall 11P of the optical lens 10P and the inner wall 21P of the lens barrel 20P are both complete circumferential surfaces, and when the optical lens 10P is held in the mounting space 22P of the lens barrel 20P, the outer wall 11P of the optical lens 10P completely fits to the inner wall 21P of the lens barrel 20P. However, because the expansion amounts of the optical lens 10P and the lens barrel 20P are not the same, the normal expansion of the whole optical lens 10P is hindered, so that the internal stress of the vehicle-mounted lens is concentrated to cause the thermal deformation of the optical lens 10P, thereby affecting the stability and the definition of the imaging of the vehicle-mounted lens and bringing potential safety hazards to the driving of the vehicle.

In addition, in order to improve the performance of optical imaging, the conventional vehicle-mounted lens further includes an optical film 30P, and the optical film 30P is formed on the optical surface of the optical lens 10P through a coating process. The optical film 30P covering the optical lens 10P is deformed once the optical lens 10P is thermally deformed at a high temperature. When the deformation of the optical surface of the optical lens 10P exceeds a certain range, the optical film 30P may crack, and the imaging of the on-vehicle lens may also be blurred, which directly causes the abnormal use of the on-vehicle lens.

Referring to fig. 1C, finite element software ANSYS Workbench is used to simulate the change process of the existing vehicle-mounted lens under a high temperature environment of 105 ℃, and according to the simulation result, the maximum thermal strain amount on the optical smooth surface of the optical lens 10P of the vehicle-mounted lens is 0.32%. If long-term use under high temperature environment, optical lens 10P is difficult to resume to initial condition after ambient temperature reduces because of the deformation that the extrusion produced, and then can't satisfy the user and continue the demand of normal use, and the user has to be through changing or maintaining the security of driving is ensured to the mode of on-vehicle camera lens, and then has increased user's use cost and maintenance cost.

Also, since the outer wall 11P of the optical lens 10P and the inner wall 21P of the lens barrel 20P each have a smooth and complete circumferential surface, and the circumferential diameter of the optical lens 10P and the circumferential diameter of the inner wall of the lens barrel 20P are adapted, the optical lens 10P is fixed transversely relative to the lens barrel 20P in the installation space of the lens barrel 20P in a manner of complete circumferential surface fit. On one hand, the smooth optical lens 10P is not convenient to be clamped and is easy to slip off in the assembling process, so that the optical lens 10P is polluted or scratched, and the yield of finished products is further influenced. On the other hand, when the optical lens 10P is mounted in the mounting space 22P of the lens barrel 20P, due to the blockage of the lens barrel 20P, it is difficult for an operator to directly place the optical lens 10P at a preset position in the lens barrel 20P by using a tool for clamping the optical lens 10P, and other tools are often needed to keep the optical lens 10P in the mounting space 22P of the lens barrel 20P in a manner of being mounted at the preset position, so that the assembly time of the vehicle-mounted lens is affected, the manufacturing cycle of the vehicle-mounted lens is prolonged, and the production cost is increased.

Disclosure of Invention

An object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein the optical lens can clearly and stably image.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein the optical lens can clearly and stably image in a high temperature environment.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the optical lens can reduce deformation of a lens in a high temperature environment, so that the optical lens can still clearly and stably image in the high temperature environment.

Another objective of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein the optical lens includes at least one film layer, the film layer covers a light-passing surface of a lens of the optical lens, and a deformation amount of the film layer of the optical lens in a high temperature environment is small.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the film layer of the optical lens is not easily cracked at a high temperature.

Another objective of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein the optical lens includes a lens barrel, the lens barrel has an assembling space, the lens is held in the assembling space of the lens barrel, and at least one assembling gap is formed between the lens and the lens barrel, so as to reduce a contact area between the lens and the lens barrel, and reduce a pressing force of the lens barrel of the optical lens on the lens when the optical lens is placed in a high temperature environment, so as to reduce a deformation amount of the lens that deforms at a high temperature, thereby ensuring definition and stability of imaging of the optical lens.

Another objective of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the optical lens reduces a contact area between the lens and the lens barrel through the assembling gap, and reduces a barrier of the lens barrel to normal expansion of the lens in a high temperature environment, so as to reduce a pressing force of the lens barrel of the optical lens placed in the high temperature environment on the lens, thereby reducing a thermal strain of the lens in the high temperature environment.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the lens of the optical lens includes an imaging main body and a mounting main body, the mounting main body extends outward from the imaging main body, when the lens is mounted in the mounting space of the lens barrel, the mounting main body is held between the imaging main body and the lens barrel, and the mounting gap is formed between the mounting main body of the lens and the lens barrel, so as to reduce a contact area of the lens and the lens barrel, and reduce a pressing force of the lens barrel of the optical lens placed in a high temperature environment on the imaging main body of the lens.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein the mounting body of the lens of the optical lens is held in the mounting space of the lens barrel by being in line-surface fit with the lens barrel, thereby reducing a contact area between the lens and the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-crack method thereof, wherein the mounting body of the lens has a polygonal structure, that is, an outer wall of the mounting body is a plane surface connected to each other, and when the lens is mounted in the mounting space of the lens barrel, the mounting space is formed between the outer wall of the mounting body of the lens and an inner wall of the lens barrel to reduce a contact area between the lens and the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein the mounting body of the lens is a regular polygon structure, and the mounting body and the imaging body of the lens have the same symmetry axis, so that the imaging body of the lens at high temperature is uniformly pressed by the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the mounting body of the lens is a non-regular polygon structure, and the mounting body and the imaging body of the lens have the same symmetry axis, so that the imaging body of the lens is uniformly pressed by the lens barrel at high temperature.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-crack method thereof, in which adjacent surfaces of outer walls of the mounting body constituting the lens have different curvatures, respectively, thereby enabling the formation of the fitting gap between the lens and the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-crack method thereof, wherein a cross section of an inner wall of the lens barrel of the optical lens has a polygonal structure, that is, the inner wall of the lens barrel is formed of planes connected to each other, and when the lens is mounted in the mounting space of the lens barrel, the mounting space is formed between an outer wall of the mounting body of the lens and the inner wall of the lens barrel, so as to reduce a contact area between the lens and the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein a cross section of an inner wall of the lens barrel of the optical lens is a regular polygon structure, so that an extrusion force of the lens barrel on the imaging main body of the lens at a high temperature is uniform.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein a cross section of an inner wall of the lens barrel is a non-regular polygonal structure, and a cross section of the inner wall of the lens barrel is an axisymmetric pattern, so that an extrusion force of the lens barrel on the imaging main body of the lens at a high temperature is uniform.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-crack method thereof, in which adjacent surfaces constituting an inner wall of the lens barrel respectively have different curvatures, thereby enabling the formation of the fitting gap between the lens and the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, wherein cross sections of the mounting body of the lens and the inner wall of the lens barrel of the optical lens each have a polygonal structure, that is, an outer wall of the mounting body and an inner wall of the lens barrel are both flat surfaces connected to each other, and when the lens is mounted in the mounting space of the lens barrel, the mounting space is formed between the outer wall of the mounting body of the lens and the inner wall of the lens barrel, so as to reduce a contact area between the lens and the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-crack method thereof, wherein the mounting body of the lens is held in the mounting space of the lens barrel in a surface-to-surface fitting manner, and the mounting gap is formed between the mounting body of the lens and the lens barrel to reduce a contact area between the lens and the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the mounting body of the lens includes a mounting portion and at least one mounting protrusion, the mounting body has at least one mounting groove, the mounting protrusion extends to the mounting portion, the mounting groove is formed between adjacent mounting protrusions, the lens is mounted in the mounting space of the lens barrel in a manner that an outer wall of the mounting protrusion and an inner wall of the lens barrel are matched with each other, and the mounting gap is formed between the mounting body of the lens and the inner wall of the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the mounting protrusions of the mounting body of the lens are uniformly extended to the mounting portion at intervals, so that the imaging body of the lens at a high temperature is uniformly pressed by the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the lens barrel includes a lens barrel main body and at least one assembling protrusion, the lens barrel main body has at least one assembling groove, the assembling protrusion extends to the lens barrel main body, the assembling groove is formed between adjacent assembling protrusions, the lens is installed in the assembling space of the lens barrel in a manner that an outer wall of the installing main body and an inner wall of the assembling protrusion of the lens barrel are mutually matched, and the assembling gap is formed between the installing main body of the lens and the inner wall of the lens barrel.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the lens can be quickly installed at a predetermined position in the assembling space of the lens barrel through an assembling gap formed between the installation body of the lens and the lens barrel, thereby facilitating to reduce the assembling time of the optical lens and shorten the assembling period.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, wherein the outer wall of the mounting body of the lens is a continuous plane, so as to facilitate clamping, prevent slipping during the assembling process, and improve the yield of the finished product while reducing the assembling man-hour.

Another object of the present invention is to provide an optical lens, an assembling method thereof and an anti-cracking method thereof, in which the lens can be easily gripped by the mounting groove of the lens, and the gripped lens can be placed at the predetermined position in the assembling space without using other tools.

Another object of the present invention is to provide an optical lens, an assembling method thereof, and an anti-cracking method thereof, in which the assembling groove formed between the assembling protrusions of the lens barrel does not block a tool for gripping the lens, thereby facilitating the lens to be placed in the assembling space of the lens barrel without replacing a working tool during the assembling process.

According to an aspect of the present invention, the present invention further provides an optical lens, comprising:

at least one lens; and

a lens barrel, wherein the lens barrel has an assembly space, an inner wall for defining the assembly space, and a light inlet and a light outlet respectively communicating the assembly space at both ends of the lens barrel, wherein the lens is assembled in the assembly space of the lens barrel, and at least one assembly gap is formed between an outer wall of the lens and the inner wall of the lens barrel.

According to an embodiment of the present invention, the lens includes an imaging body and a mounting body extending from the imaging body, the lens is mounted in the mounting space of the lens barrel in such a manner that the mounting body and the inner wall of the lens barrel are fitted to each other, and the mounting gap is formed between an outer wall of the mounting body and the inner wall of the lens barrel.

According to one embodiment of the invention, the outer wall of the mounting body of the lens is formed by a plurality of successive planes, with angles between adjacent planes.

According to one embodiment of the invention, the imaging body and the mounting body of the lens have the same axis of symmetry and the imaging body and the mounting body have the same center.

According to one embodiment of the invention, the mounting body of the lens is a regular polygonal structure.

According to one embodiment of the invention, the planes of the outer walls of the mounting bodies constituting the lenses have different lengths.

According to one embodiment of the invention, the number of planes constituting the outer wall of the mounting body of the lens is equal to or greater than six.

According to one embodiment of the invention, adjacent surfaces of the outer wall constituting the mounting body each have a different curvature.

According to one embodiment of the present invention, the mounting body includes a mounting portion extending outwardly from the imaging body and at least one mounting protrusion extending outwardly from the mounting portion and forming the mounting groove between adjacent mounting protrusions.

According to one embodiment of the invention, the mounting protrusions are evenly distributed around the mounting portion at intervals.

According to one embodiment of the present invention, the mounting protrusions are symmetrically distributed around the mounting portion.

According to one embodiment of the present invention, the number of the mounting projections is equal to or greater than three.

According to an embodiment of the present invention, the inner wall of the lens barrel is formed by a plurality of continuous planes, and an included angle exists between adjacent planes.

According to an embodiment of the present invention, the inner wall of the lens barrel has a cross-sectional shape having the same axis of symmetry as the lens placed laterally in the fitting space.

According to an embodiment of the present invention, a cross-section of the inner wall of the lens barrel is a regular polygon.

According to an embodiment of the present invention, planes constituting the inner wall of the lens barrel have different lengths.

According to an embodiment of the present invention, the number of planes constituting the inner wall of the lens barrel is equal to or greater than six.

According to an embodiment of the present invention, adjacent surfaces of the inner wall constituting the lens barrel respectively have different curvatures.

According to an embodiment of the present invention, the lens barrel includes a barrel body and at least one fitting protrusion, and the lens barrel has at least one fitting groove, the fitting protrusion extends from the barrel body, and the fitting groove is formed between adjacent fitting protrusions.

According to an embodiment of the present invention, the fitting protrusions are evenly distributed at intervals on the periphery of the barrel body.

According to an embodiment of the present invention, the fitting protrusions are symmetrically distributed on the periphery of the barrel body.

According to an embodiment of the present invention, the number of the fitting projections is equal to or greater than three.

According to an embodiment of the present invention, the optical lens further includes a film layer covering the imaging main body of the lens.

According to another aspect of the present invention, there is further provided an imaging apparatus comprising:

at least one optical lens, wherein the optical lens includes at least one lens and a lens barrel, wherein the lens barrel has an assembly space, an inner wall for defining the assembly space, and a light inlet and a light outlet respectively communicating the assembly space at two ends of the lens barrel, wherein the lens is assembled in the assembly space of the lens barrel, and at least one assembly gap is formed between an outer wall of the lens and the inner wall of the lens barrel; and

a photoelectric conversion unit, wherein the photoelectric conversion unit comprises a photosensitive chip, and the lens of the optical lens is held in a photosensitive path of the photosensitive chip.

In another aspect of the present invention, there is further provided an automobile with an image forming apparatus, comprising:

an automobile body; and

an imaging device, wherein the imaging device is mounted on the automobile body, and the imaging device comprises at least one optical lens and a photoelectric conversion unit, wherein the optical lens comprises at least one lens and a lens barrel, wherein the lens barrel has an assembly space, an inner wall for defining the assembly space, and a light inlet and a light outlet which are respectively communicated with the assembly space at two ends of the lens barrel, wherein the lens is assembled in the assembly space of the lens barrel, and at least one assembly gap is formed between an outer wall of the lens and the inner wall of the lens barrel, wherein the photoelectric conversion unit comprises a photosensitive chip, and the lens of the optical lens is held in a photosensitive path of the photosensitive chip.

According to another aspect of the present invention, the present invention further provides an assembling method of an optical lens, the assembling method comprising the steps of:

(a) providing a lens barrel with an assembly space, and a light inlet and a light outlet which are communicated with the assembly space; and

(b) assembling the lens on the lens barrel in a manner that at least one assembling gap is formed between the outer wall of the lens and the inner wall of the lens barrel so as to assemble the optical lens.

According to another aspect of the present invention, the present invention further provides an anti-cracking method for a film layer of an optical lens, the anti-cracking method comprising the following steps: at least one assembling gap is formed between a lens and a lens barrel, so that when the lens barrel and the lens deform due to the fact that the optical lens is heated, the assembling gap is used for preventing the lens barrel from exerting extrusion force on the whole outer wall of the lens, and therefore film layers of the lens are prevented from cracking.

Drawings

Fig. 1A is a schematic perspective view of a vehicular lens according to the prior art.

Fig. 1B is a schematic cross-sectional view of the onboard lens in a high-temperature environment according to the related art.

Fig. 1C is a schematic diagram of a thermal strain cloud of the on-vehicle lens at a high temperature of 105 ℃ according to the related art.

Fig. 2A is a schematic perspective view of an optical lens according to a preferred embodiment of the invention.

Fig. 2B is a schematic top view of the optical lens system according to the above preferred embodiment of the invention.

Fig. 2C is a schematic cross-sectional view of the optical lens according to the above preferred embodiment of the invention in a high temperature environment.

Fig. 2D is a cloud diagram of thermal strain of a lens of the optical lens according to the above preferred embodiment of the invention at a high temperature of 105 ℃.

Fig. 3 is a schematic diagram of the lens of the optical lens according to another preferred embodiment of the invention.

Fig. 4 is a schematic diagram of the lens of the optical lens according to another preferred embodiment of the invention.

Fig. 5 is a schematic diagram of the lens of the optical lens according to another preferred embodiment of the invention.

Fig. 6A is an exploded view of the optical lens according to another preferred embodiment of the invention.

Fig. 6B is a schematic top view of the optical lens according to the above preferred embodiment of the invention.

Fig. 7 is a schematic diagram of the lens of the optical lens according to another preferred embodiment of the invention.

Fig. 8 is a schematic diagram of the lens of the optical lens according to another preferred embodiment of the invention.

Fig. 9A is an exploded view of the lens of the optical lens according to another preferred embodiment of the invention.

Fig. 9B is a schematic top view of the optical lens according to the above preferred embodiment of the invention.

Fig. 10 is a schematic view of the lens barrel of the optical lens according to another preferred embodiment of the present invention.

Fig. 11 is a schematic view of the lens barrel of the optical lens according to another preferred embodiment of the present invention.

Fig. 12A is an exploded view of the optical lens according to another preferred embodiment of the invention.

Fig. 12B is a schematic top view of the optical lens according to the above preferred embodiment of the invention.

Fig. 13 is a schematic view of the lens barrel of the optical lens according to another preferred embodiment of the present invention.

Fig. 14 is a schematic view of the lens barrel of the optical lens according to another preferred embodiment of the present invention.

Fig. 15 is a schematic top view of the optical lens according to another preferred embodiment of the invention.

Fig. 16 is a schematic top view of the optical lens according to another preferred embodiment of the invention.

Fig. 17 is a schematic view illustrating an application of the optical lens to an imaging device according to a preferred embodiment of the invention.

Fig. 18 is a schematic view illustrating an optical lens according to a preferred embodiment of the invention being applied to an automobile.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 2A to 2C, 17 and 18 of the specification, an optical lens 100 according to a preferred embodiment of the present invention will be described in the following description, wherein the optical lens 100 has good image stability and clarity, and the optical lens 100 can be assembled to form an imaging device 200, such as a camera module. The imaging device 200 is suitable for various industries, such as the automobile industry, and at least one imaging device 200 assembled by the optical lens 100 is installed on an automobile 300 to monitor the automobile 300 and the environment around the automobile 300, so as to ensure the safety of the automobile 300 during the driving process. Further, the optical lens 100 can still have good imaging stability and definition at high temperature, so that the stability of the imaging device 200 is guaranteed to ensure the driving safety of the automobile 300 at high temperature.

Specifically, referring to the specification 2A and fig. 2B, the optical lens 100 includes at least one lens 10 and a lens barrel 20, wherein the lens barrel 20 has an assembly space 21, the lens 10 is held in the assembly space 21 of the lens barrel 20, and at least one assembly gap 30 is formed between the lens 10 and the lens barrel 20, thereby reducing a contact area between the lens 10 and the lens barrel 20. Further, once the optical lens 100 is placed in a high temperature environment, the lens 10 and the lens barrel 20 both expand, increase in volume and press each other, and the assembly gap 30 formed between the lens 10 and the lens barrel 20 can reduce the obstruction of the lens barrel 20 to the normal expansion of the lens 10 in the high temperature environment, so as to reduce the pressing force of the lens barrel 20 of the optical lens 100 to the lens 10 placed in the high temperature environment, thereby reducing the deformation amount of the lens 10 in the high temperature environment. Furthermore, the existence of the assembly gap 30 can reduce the thermal strain amount of the lens 10 in a high-temperature environment, and avoid the influence of the imaging blur caused by the thermal deformation of the lens 10 due to the compression of the lens barrel 20 on the normal use of the optical lens 100.

Further, referring to the specification 2A and fig. 2B, the lens barrel 20 of the optical lens 100 has an inner wall 22 defining the assembling space 21, a light inlet 23, and a light outlet 24, wherein the light inlet 23 and the light outlet 24 are respectively formed at two end portions of the lens barrel 20, and the assembling space 21 communicates the light inlet 23 and the light outlet 24. The lens 10 may be implemented to be installed in the assembling space 21 of the lens barrel 20 from the light inlet 23 and/or the light outlet 24, and light can reach the lens 10 in the assembling space 21 of the lens barrel 20 through the light inlet 23 of the lens barrel 20, so that an image can be formed on one side of the lens 10. Specifically, each of the lenses 10 is installed in the assembly space 21 according to a preset position, which can be implemented, but not limited to, according to conditions such as an optical path direction, a focal length, and the like. For example, the plurality of lenses 10 are sequentially stacked in the mounting space 21 of the lens barrel 20 at intervals along the optical path direction. Meanwhile, the lens barrel 20 is made of a light-tight material to prevent stray light in the external space from affecting the imaging effect of the lens 10. The material and manufacturing process of the lens barrel 20 are not limited, and the lens barrel 20 may be implemented, but not limited to, injection molding from plastic, die casting from metal, or lathe forming.

In order to ensure the imaging performance of the lens 10 of the optical lens 100, referring to the specification 2A and fig. 2B, the optical lens 100 further includes a film 40, and the film 40 is formed on the lens 10. Preferably, the film layer 40 is firmly covered on the lens 10 by a coating process. The assembling gap 30 formed between the lens 10 and the lens barrel 20 reduces the extrusion of the lens barrel 20 of the optical lens placed in a high temperature environment to the lens 10, thereby reducing the thermal strain of the lens 10, and simultaneously reducing the deformation of the film layer 40 covering the surface of the lens 10, avoiding the film layer 40 from cracking due to the thermal deformation of the lens 10, and further ensuring the imaging stability and definition of the optical lens 100 in the high temperature environment.

Further, the operator may cause the lens 10 to be mounted at the preset position in the fitting space 21 of the lens barrel 20 by moving a tool for gripping the lens 10 in the fitting gap 30 between the lens 10 and the lens barrel 20. That is, the assembling space 30 formed between the lens 10 and the lens barrel 20 can avoid blocking a tool for clamping the lens 10, so that an operator can place the lens 10 at the predetermined position in the assembling space 21 of the lens barrel 20 without replacing the tool during the assembling process, thereby reducing the assembling time of the optical lens 100, shortening the assembling period, and reducing the manufacturing cost.

Specifically, referring to fig. 2A and 2B, the lens 10 includes an imaging body 11 and a mounting body 12, the mounting body 12 extends outward from the imaging body 11, and the film 40 covers the imaging body 11 of the lens 10 to improve the imaging effect of the lens 10. When the lens 10 is held in the fitting space 21 of the lens barrel 20, the mounting body 12 is located between the imaging body 11 and the lens barrel 20, and at least one fitting gap 30 is formed between an outer wall 121 of the mounting body 12 and the inner wall 22 of the lens barrel 20, so as to reduce a contact area between the lens barrel 20 and the lens 10, thereby reducing a thermal strain amount of the imaging body 11 of the lens 10 placed in a high temperature environment, and reducing a deformation amount of the film 40 covering the surface of the imaging body 11, thereby preventing the film 40 from cracking due to thermal deformation of the lens 10.

The imaging subject 11 allows light to pass through and can be clearly imaged at one side of the imaging subject 11. It is noted that the type of the imaging subject 11 is not limited, and the imaging subject 11 may be implemented as one or a combination of more of a concave lens, a convex lens, or other types of lenses. The imaging body 11 may be implemented by glass, plastic or other materials known to those skilled in the art. The specific number, type and material of the imaging bodies 11 in the drawings and description of the present invention are merely examples, and should not be construed as limiting the content and scope of the optical lens according to the present invention.

According to a preferred embodiment of the present invention, the mounting body 12 of the lens 10 of the optical lens 100 is retained in the assembly space 21 of the lens barrel 20 by linear surface matching with the lens barrel 20, so as to reduce the contact area between the lens 10 and the lens barrel 20. Specifically, the outer wall 121 of the mounting body 12 of the lens 10 is formed by a plurality of planes 1211 connected to each other, and the adjacent planes are angled to form at least one assembly line 1212 between the adjacent planes 1211. The sizes of the lens 10 and the lens barrel 20 are matched, and thus the lens 10 can be fitted to the inner wall 22 of the lens barrel 20 through the assembly line 1212 of the mounting body 12, so that the lens 10 can be transversely held in the assembly space 21 of the lens barrel 20 relative to the inner wall 21 of the lens barrel 20. The inner wall 22 of the lens barrel 20 is a complete circumferential surface, and the assembly gap 30 is formed between the plane 1212 of the outer wall 121 and the inner wall 22 of the lens barrel 20, so as to reduce a contact area between the inner wall 22 of the lens barrel 20 and the outer wall 121 of the mounting body 12 of the lens 10, which is beneficial to reducing a barrier of the lens barrel 20 to normal expansion of the lens 10 in a high temperature environment, and also reducing a squeezing force of the lens barrel 20 of the optical lens 100 placed in the high temperature environment on the imaging body 11 of the lens 10, thereby reducing a thermal strain amount of the imaging body 11 of the lens 10 deformed in the high temperature environment. Therefore, the optical lens 100 can still clearly and stably image in a high-temperature environment.

Preferably, the mounting body 12 of the lens 10 is of regular polygonal configuration, i.e. the planes 1211 constituting the outer wall 121 of the mounting body 12 have the same dimensions. And the maximum radius of the mounting body 12 of the lens 10 is adapted to the radius of the inner wall 22 of the lens barrel 20, so that the assembly line 1212 of the mounting body 12 of the lens 10 mounted in the assembly space 21 of the lens barrel 20 can closely fit the inner wall 22 of the lens barrel 20. Further, the imaging body 11 and the mounting body 12 of the lens 10 have the same symmetry axis, and the imaging body 11 and the mounting body 12 have the same center, so that the mounting body 12 and the imaging body 11 of the lens 10 placed in a high temperature environment can be uniformly pressed by the lens barrel 20, deformation of the imaging body 11 due to uneven stress is avoided, and meanwhile, the film layer 40 covering the imaging body 11 is prevented from being cracked due to deformation of the imaging body 11, and stability and definition of imaging of the lens 10 are further ensured.

It is worth mentioning that the number of sides of the mounting body 12 of the lens 10 in the regular polygon configuration is not limited, for example, referring to fig. 2A, 3, 4, the mounting body 12 of the lens 10 can be implemented as, but not limited to, a regular 12-sided polygon, a regular 6-sided polygon, a regular 7-sided polygon, etc. Preferably, the number of sides of the mounting body 12 is equal to or greater than six.

Referring to fig. 2C and 2D of the specification, the optical lens 100 shown in fig. 2A is placed in a high temperature environment of 105 ℃, according to the calculation result, the maximum thermal strain amount of the imaging main body 11 of the lens 10 of the optical lens 100 is 0.095%, compared with the existing vehicle-mounted lens, the maximum thermal strain amount of the optical lens 100 of the present invention is significantly reduced, which illustrates that in the optical lens 100 of the present invention, the mounting gap 30 formed between the lens 10 and the lens barrel 20 can significantly reduce the thermal strain amount of the imaging main body 11 of the lens 10 at the high temperature, and at the same time, the acting force of the imaging main body 11 on the film layer 40 formed on the imaging main body 11 is also reduced, thereby avoiding the film layer 40 from cracking due to the deformation amount of the imaging main body 11 exceeding a certain range, further ensuring that the lens 10 can still have good imaging stability and definition at the high temperature, the service life of the optical lens 100 is extended.

Referring to fig. 5, in other embodiments of the present invention, the mounting body 12 of the lens 10 of the optical lens 100 may also be implemented as a non-regular polygon, i.e., the lengths of the planes 1211 constituting the outer wall 121 of the mounting body 12 are not completely equal. And, the maximum radius of the installation body 12 of the lens 10 is adapted to the radius value of the inner wall 22 of the lens barrel 20, so that the assembly line 1212 of the installation body 12 of the lens 10 installed in the assembly space 21 of the lens barrel 20 can closely fit to the inner wall 22 of the lens barrel 20. Further, the non-regular polygon mounting body 12 is symmetrical or antisymmetric with respect to the center of the imaging body 11, so that the mounting body 12 and the imaging body 11 of the lens 10 placed in a high temperature environment can be uniformly extruded by the lens barrel 20, the imaging effect of the lens 10 is prevented from being affected by deformation of the imaging body 11 due to uneven stress, the film 40 covering the imaging body 11 is prevented from being cracked due to deformation of the imaging body 11, and the stability and definition of imaging of the lens 10 are favorably ensured.

In addition, in the assembling process, an operator can clamp the lens 10 by clamping the plane 1211 of the outer wall 121 of the mounting body 12, and compared with the arc curved surface of the existing optical lens, the lens 10 of the optical lens 100 of the present invention is more convenient to clamp and is not easy to slip off in the assembling process, which is beneficial to reducing the assembling man-hour and improving the yield of the finished product. In addition, the assembling space 30 formed between the lens 10 and the lens barrel 20 can prevent the lens barrel 20 from blocking a tool for clamping the lens 10, so that an operator can place the lens 10 at the preset position in the assembling space 21 of the lens barrel 20 without replacing the tool in the assembling process, thereby reducing the assembling time of the optical lens 100, shortening the assembling period, and reducing the manufacturing cost.

It should be understood that adjacent surfaces of the outer wall 121 constituting the mounting body 12 have different curvatures, and the lens 10 can be held by the inner wall 22 of the lens barrel 20 and stably held in the fitting space 21 of the lens barrel 20, so that the fitting gap 30 can be formed between the lens 10 and the inner wall 22 of the lens barrel 20 to reduce a contact area between the lens 10 and the lens barrel 20. That is, the adjacent surfaces of the outer wall 121 of the mounting body 12 may be one or a combination of two or more of a plane and a curved surface, for example, the adjacent surfaces are both planes, or the adjacent surfaces are both curved surfaces with different curvatures, or the adjacent surfaces are a combination of planes and curved surfaces.

Referring to fig. 6A-8, another embodiment of the mounting body 12 of the lens 10 is shown, wherein the mounting body 12 includes a mounting portion 122 and at least one mounting protrusion 123, the mounting body 12 has at least one mounting slot 124, the mounting protrusion 123 extends from the mounting portion 122 and forms the mounting slot 124 between adjacent mounting protrusions 123, and the mounting portion 122 extends from the imaging body 11. The diameter of the mounting body 12 is adapted to the inner wall 22 of the lens barrel 20, so that the lens 10 can be held in the assembly space 21 of the lens barrel 20 by means of the outer wall 1231 of the mounting protrusion 123 of the mounting body 12 fitting with the inner wall 22 of the lens barrel 20, and the assembly gap 30 is formed between the mounting portion 122, the mounting protrusion 123 and the inner wall 22 of the lens barrel 20, so as to reduce the contact area between the lens 10 and the lens barrel 20, and further reduce the pressing force of the lens barrel 20 of the optical lens 100 placed in a high temperature environment on the lens 10, further prevent the film 40 covering the imaging body 11 of the lens 10 from cracking, and ensure the normal use of the optical lens 100. That is, the lens 10 can be held in the fitting space 21 of the lens barrel 20 by surface-fitting the mounting body 12 to the inner wall 22 of the lens barrel 20, that is, the outer walls 1231 of the plurality of spaced mounting protrusions 123 of the mounting body 12 of the lens 10 correspond to the inner wall 21 of the lens barrel 20 having one complete circumference.

Further, an operator can conveniently clamp the lens 10 by the mounting protrusion 123 and the mounting groove 124 of the lens 10, and the lens 10 is not easy to slip off in the assembling process. Meanwhile, the clamped lens 10 can be placed at the preset position in the assembling space 21 of the lens barrel 20 without using other tools, so that assembling time is saved.

Preferably, the mounting protrusions 123 are uniformly and symmetrically distributed on the periphery of the mounting portion 122, so that the lens barrel 20 of the lens 100 placed in a high-temperature environment can uniformly press the lens 10, which is beneficial to reducing the thermal strain of the imaging body 11 and the film 40 of the lens 10 in the high-temperature environment.

Preferably, the mounting protrusions 123 are uniformly distributed at intervals on the periphery of the mounting portion 122 of the mounting body 12, further enabling the lens barrel 20 of the lens barrel 100 placed in a high-temperature environment to uniformly press the lens 10, which is beneficial to reducing the thermal strain amount of the imaging body 11 of the lens 10 in the high-temperature environment. It should be understood that the mounting protrusions 123 may also be implemented to be distributed around the mounting portion 122 at non-equidistant intervals.

It is worth mentioning that the specific shape of the outer wall 1231 of the mounting protrusion 123 is not limited. Preferably, the outer wall 1231 of the mounting protrusion 123 is implemented as a plane, thereby facilitating gripping. Preferably, the outer wall 1231 of the mounting protrusion 123 is implemented as a circular arc curved surface, so that the outer wall 1231 can closely adhere to the inner wall 22 of the lens barrel 20, and the lens 10 is prevented from shaking in the assembling space 21 of the lens barrel 20.

In addition, the specific number of the mounting projections 123 of the mounting body 12 is not limited. For example, referring to fig. 6A, 7 and 8, the mounting protrusion 123 may be implemented as 3, 5 or a plurality of the mounting protrusions 123 such that the mounting body 12 is gear-shaped. Also, the shape of the mounting projection 123 is not limited. For example, the cross section of the mounting protrusion 123 may be implemented as one or a combination of a triangle, a square, a rectangle, and a trapezoid. It should be noted that the specific shape and number of the mounting protrusions 123 illustrated in the drawings and described in the specification are merely examples, and should not be construed as limiting the content and scope of the optical lens of the present invention.

Referring to the description fig. 9A to 9B, a preferred embodiment of the lens barrel 20 of the optical lens 100 is shown. Preferably, the cross section of the inner wall 22 of the lens barrel 20 of the optical lens 100 is a polygonal structure, and the inner wall 22 of the lens barrel 20 clamps the lens 10 by line-surface matching with the mounting body 12 of the lens 10, so that the lens 10 is held in the assembling space 21 of the lens barrel 20, thereby reducing the contact area between the lens 10 and the lens barrel 20.

Specifically, the inner wall 22 of the lens barrel 20 is formed by a plurality of mutually connected planes 221, and an included angle exists between the adjacent planes 221. The diameter of the mounting body 12 of the lens 10 is matched with the diameter of the lens barrel 20, the outer wall 121 of the mounting body 12 of the lens 10 is a complete circumferential surface, and the plane 221 of the inner wall 22 of the lens barrel 20 is tangent to the circumference of the mounting body 12, so that a contact point between any planes of the mounting body 12 and the inner wall 22 of the lens barrel 20 can be on the same straight line, and further the inner wall 22 of the lens barrel 20 can clamp the lens 10, so that the lens 10 is stably held in the assembling space 21 of the lens barrel 20. Further, the assembly gap 30 is formed between the plane 221 constituting the inner wall 22 and the outer wall 121 of the mounting body 12 of the lens 10, so as to reduce a contact area between the inner wall 22 of the lens barrel 20 and the outer wall 121 of the mounting body 12 of the lens 10, and further reduce a resistance of the lens barrel 20 to normal expansion of the lens 10 in a high temperature environment, that is, reduce a pressing force of the lens barrel 20 of the optical lens 100 to the imaging body 11 of the lens 10 placed in the high temperature environment, and further reduce a thermal strain amount of the imaging body 11 of the lens 10 deformed in the high temperature environment, thereby further ensuring that the film layer covering the imaging body 11 of the lens 10 is not easily cracked in the high temperature environment. Therefore, the optical lens 100 can still clearly and stably image in a high-temperature environment.

Preferably, the cross section of the inner wall 22 of the lens barrel 20 is a regular polygon, and the maximum radius of the inner wall 22 of the lens barrel 20 is adapted to the radius of the mounting body 12 of the lens 10, so that the mounting body 21 of the lens barrel 20 mounted in the fitting space 21 of the lens barrel 20 can closely fit the plane 221 of the inner wall 22 of the lens barrel 20. Further, the cross-sectional shape of the inner wall 22 of the lens barrel 20 and the lens 10 transversely placed in the fitting space 22 have the same symmetry axis, and the inner wall 22 of the lens barrel 20 and the lens 10 have the same center, so that the inner wall 22 of the lens barrel 20 and the imaging main body 11 placed in a high-temperature environment can be uniformly pressed by the lens barrel 20, and the imaging effect of the lens 10 is prevented from being influenced by deformation of the imaging main body 11 due to uneven stress. Meanwhile, the film layer 40 covering the imaging main body 11 is prevented from being cracked due to the deformation of the imaging main body 11, and the stability and the definition of the imaging of the lens 10 are further guaranteed.

It is worth mentioning that the number of sides of the cross section of the inner wall 22 of the lens barrel 20 is not limited, i.e., the number of the planes 221 constituting the inner wall 22 is not limited. For example, referring to fig. 9A to 10, the number of the planes 221 constituting the inner wall 22 may be implemented as, but not limited to, 6, seven, etc., that is, the cross section of the inner wall 22 of the lens barrel 20 may be implemented as, but not limited to, a positive 6-sided polygon, a positive 7-sided polygon, etc. Preferably, the number of sides of the cross section of the inner wall 22 of the lens barrel 20 is equal to or greater than six.

Referring to fig. 11, in other embodiments of the present invention, the cross-section of the inner wall 22 of the lens barrel 20 may also be implemented as a non-regular polygon, i.e., the lengths of the planes 221 constituting the inner wall 22 are not exactly equal. And, the maximum radius of the mounting body 12 of the lens 10 is adapted to the radius value of the inner wall 22 of the lens barrel 20, so that the lens 10 can be stably clamped by the inner wall 22 mounted to the lens barrel 20. Further, the inner wall 22 of the lens barrel 20 with a non-regular polygon cross section is symmetrical or anti-symmetrical with respect to the center of the imaging main body 11 of the lens 10 placed in the assembly space 21 of the lens barrel 20, so as to ensure that the mounting main body 12 and the imaging main body 11 of the lens 10 placed in a high temperature environment can be uniformly extruded by the lens barrel 20, avoid the imaging main body 11 from being deformed due to uneven stress to affect the imaging effect of the lens 10, further prevent the film 40 covering the imaging main body 11 from being cracked due to the deformation of the imaging main body 11, and be beneficial to ensuring the imaging stability and definition of the lens 10.

It should be understood that adjacent surfaces constituting the inner wall 22 of the lens barrel 20 have different curvatures, and the lens 10 can be held by the inner wall 22 of the lens barrel 20 and stably held in the fitting space 21 of the lens barrel 20, so that the fitting gap 30 can be formed between the lens 10 and the inner wall 22 of the lens barrel 20. That is, the adjacent surfaces of the inner wall 22 of the lens barrel 20 may be implemented as one or a combination of two or more of a plane and a curved surface, for example, the adjacent surfaces are both planes, or the adjacent surfaces are both curved surfaces having different curvatures, or the adjacent surfaces are a combination of a plane and a curved surface.

In addition, in the assembling process, the assembling space 30 formed between the lens 10 and the lens barrel 20 can prevent the lens barrel 20 from blocking a tool for clamping the lens 10, so that an operator can place the lens 10 at the preset position in the assembling space 21 of the lens barrel 20 without replacing the tool in the assembling process, thereby reducing the assembling man-hour of the optical lens 100, shortening the assembling period, and reducing the manufacturing cost.

Referring to fig. 12A to 14, another embodiment of the lens barrel 20 is shown, wherein the lens barrel 20 includes a barrel main body 25 and at least one assembling protrusion 26, the lens barrel 20 has at least one assembling groove 27, the assembling protrusion 26 extends from the barrel main body 25, the assembling groove 27 is formed between the adjacent assembling protrusions 26, and the assembling groove 27 communicates with the assembling space 21. The diameter of the mounting body 12 is adapted to the distance from the central axis of the lens barrel 20 to the fitting projection 26, so that the lens 10 can be held in the fitting space 21 of the lens barrel 20 by the way that the outer wall 121 of the mounting body 12 is in abutment with an inner wall 261 of the fitting projection 26 of the lens barrel 20, thereby forming the fitting gap 30 between the barrel body 25, the fitting projection 26, and the outer wall 121 of the mounting body 12 of the lens 10, to reduce a contact area of the lens 10 with the barrel 20, further, the squeezing force of the lens barrel 20 of the optical lens 100 placed in a high temperature environment to the lens 10 can be reduced, the film layer 40 of the imaging body 11 covering the lens 10 is further prevented from being cracked, and the normal use of the optical lens 100 is ensured. That is, the lens barrel 20 can hold the lens 10 by surface-fitting the inner wall 261 of the fitting protrusion 26 with the outer wall 121 of the mounting body 12 of the lens 10, so that the lens 10 is held in the fitting space 21 of the lens barrel 20, that is, the inner walls 261 of a plurality of mutually spaced fitting protrusions 26 of the lens barrel 20 correspond to the outer wall 121 of the mounting body 12 of the lens having one complete circumference. In other words, when the optical lens 100 is placed in a high temperature environment, the lens barrel 20 and the lens 10 of the optical lens 100 both expand, and only the assembling protrusion 26 of the lens barrel 20 directly extrudes the mounting body 12 of the lens 10, so that compared with the conventional vehicle-mounted lens in which the circumferential surfaces of the outer wall of the lens and the inner wall of the lens barrel are completely attached to each other, the lens barrel 20 of the optical lens 100 of the present invention reduces the limitation on the normal expansion of the lens 10 in the high temperature environment, and further reduces the extrusion acting force of the lens barrel 20 on the lens 10.

Preferably, the assembling protrusions 26 are uniformly and symmetrically distributed on the periphery of the lens barrel main body 25, so that the assembling protrusions 26 of the lens barrel 20 of the lens 100 placed in a high temperature environment can uniformly press the lens 10, which is beneficial to reducing the thermal strain of the imaging main body 11 and the film layer 40 of the lens 10 in the high temperature environment.

Preferably, the assembling protrusions 26 are evenly distributed at intervals on the circumference of the barrel main body 25 of the mounting main body 12, further enabling the barrel 20 of the lens 100 placed in a high temperature environment to evenly press the lens 10, which is beneficial to reducing the thermal strain amount of the imaging main body 11 of the lens 10 in a high temperature environment. It should be understood that the fitting protrusions 26 may also be implemented to be distributed around the barrel body 25 at non-equidistant intervals.

It is worth mentioning that the specific shape of the inner wall 26 of the fitting projection 26 is not limited. Preferably, the inner wall 261 of the fitting projection 26 is implemented as a circular arc curved surface, so that the inner wall 261 of the fitting projection 26 can be closely attached to the mounting body 12 of the lens 10, and the lens 10 is prevented from shaking in the fitting space 21 of the lens barrel 20. It should be understood that the inner wall 261 of the fitting projection 26 may also be implemented as a plane.

In addition, the specific number of the fitting protrusions 26 of the lens barrel 20 is not limited. For example, referring to fig. 12A to 14, the assembling protrusion 26 may be implemented as 3, 4, or a plurality of assembling protrusions 26 such that the inner wall 22 of the lens barrel 20 is gear-shaped. Also, the shape of the fitting projection 26 is not limited. For example, the cross section of the fitting projection 26 may be implemented as one of a triangle, a square, a rectangle, a trapezoid, or a combination of more than one. It should be noted that the specific shape and number of the fitting projections 26 illustrated in the drawings and described in the specification are merely examples, and should not be construed as limiting the content and scope of the optical lens of the present invention.

It is worth mentioning that the features of the different embodiments above may be combined with each other. For example, referring to fig. 15 of the specification, the mounting body 12 of the lens 10 is implemented as a polygonal structure, and the cross section of the inner wall 22 of the lens barrel 20 is also implemented as a polygonal structure, and the assembly line 1212 of the outer wall 121 of the mounting body 12 of the lens 10 is closely attached to the plurality of mutually connected flat surfaces 221 of the inner wall 22 of the lens barrel 20, so that the lens 10 is stably held in the assembly space 21 of the lens barrel 20 while the assembly gap 30 is formed between the flat surface 1211 of the outer wall 121 of the mounting body 12 of the lens 10 and the flat surface 221 of the inner wall 22 of the lens barrel 20. Referring to fig. 16, the lens 10 is stably held in the fitting space 21 of the lens barrel 20 in such a manner that the outer wall 1231 of the fitting protrusion 123 of the fitting body 12 and the inner wall 261 of the fitting protrusion 26 of the lens barrel 20 are attached to each other, and the fitting groove 27 of the lens barrel 20 and the fitting groove 124 of the fitting body 12 of the lens 10 communicate with each other to form the fitting gap 30.

Referring to fig. 17, the optical lens 100 of the present invention can be applied to the imaging device 200, and specifically, the imaging device 200 includes at least one optical lens 100 and a photoelectric conversion unit 210, where the photoelectric conversion unit 210 includes a photosensitive chip 211, the lens 10 of the optical lens 100 is held on a photosensitive path of the photosensitive chip 211, and light passing through the imaging subject 11 of the lens 10 of the optical lens 100 can reach the photosensitive chip 211, so that the imaging device 200 can image.

Referring to fig. 18, the imaging device 200 can be applied to the automobile 300, and specifically, the automobile 300 includes an automobile body 310 and at least one imaging device 200, and the imaging device 200 is mounted on the automobile body 310 and can monitor the automobile body 310 and the environment around the automobile body 310, thereby ensuring the safety of the automobile body 310 during driving.

According to another aspect of the present invention, the present invention further provides an assembling method of an optical lens, wherein the assembling method includes the steps of:

(a) providing a lens barrel 20 having a fitting space 21 and a light inlet 23 and a light outlet 24 communicating with the fitting space 21; and

(b) the optical lens is assembled by assembling the lens 10 to the lens barrel 20 in such a manner that at least one assembling gap 30 is formed between an outer wall of the lens 10 and an inner wall of the lens barrel 20.

According to another aspect of the present invention, the present invention further provides a method for preventing cracking of a film layer of an optical lens, wherein the method for preventing cracking comprises the following steps: at least one assembling gap 30 is formed between a lens 10 and a lens barrel 20, so that when the optical lens 100 is heated to cause the lens barrel 20 and the lens 10 to deform, the assembling gap 30 is used for preventing the lens barrel 20 from applying a compression force on the whole outer wall of the lens 10, thereby preventing the film 40 covering the lens 10 from cracking.

It will be appreciated by persons skilled in the art that the above embodiments are only examples, wherein features of different embodiments may be combined with each other to obtain embodiments which are easily conceivable in accordance with the disclosure of the invention, but which are not explicitly indicated in the drawings.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.