阅读说明：本技术 光学镜头 (Optical lens ) 是由 王东方 孙毅 姚波 于 2018-05-16 设计创作，主要内容包括：本申请公开了一种光学镜头,该光学镜头沿着光轴由物侧至像侧依序可包括：第一透镜、第二透镜、第三透镜、第四透镜、第五透镜、和第六透镜。其中,第一透镜可具有负光焦度,其物侧面为凸面,像侧面为凹面；第二透镜可具有正光焦度,其物侧面为凸面；第五透镜可具有正光焦度,其物侧面和像侧面均为凸面；第六透镜可具有负光焦度,其像侧面为凹面；以及第三透镜和第四透镜可相互胶合组成胶合透镜。根据本申请的光学镜头,可实现高解像、小型化、前端小口径、长焦化、大视场角、主光线角小、后焦长等中的至少一个有益效果。(This application discloses a kind of optical lens, the optical lens along optical axis by object side to image side sequentially can include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.Wherein, the first lens can have negative power, and object side is convex surface, and image side surface is concave surface；Second lens can have positive light coke, and object side is convex surface；5th lens can have positive light coke, and object side and image side surface are convex surface；6th lens can have negative power, and image side surface is concave surface；And the third lens and the 4th lens can mutually gluing unit at balsaming lens.According to the optical lens of the application, it can be achieved that high-resolution, miniaturization, front end be small-bore, long coking, big field angle, at least one beneficial effect in the small, back focal length of chief ray angle etc..)

1. optical lens, along optical axis by object side to image side sequentially include: the first lens, the second lens, the third lens, the 4th thoroughly Mirror, the 5th lens and the 6th lens,

It is characterized in that,

First lens have negative power, and object side is convex surface, and image side surface is concave surface；

Second lens have positive light coke, and object side is convex surface；

5th lens have positive light coke, and object side and image side surface are convex surface；

6th lens have negative power, and image side surface is concave surface；And

The third lens and the mutual gluing unit of the 4th lens are at balsaming lens.

2. optical lens according to claim 1, which is characterized in that the object side of first lens is at distance light axis Concave surface is convex surface, generally bi-concave shape at dipped beam axis.

3. optical lens according to claim 1, which is characterized in that first lens are aspherical lens.

4. optical lens according to claim 1, which is characterized in that the image side surface of second lens is convex surface.

5. optical lens according to claim 1, which is characterized in that the image side surface of second lens is concave surface.

6. optical lens according to claim 1, which is characterized in that the third lens have negative power, object side Face and image side surface are concave surface.

7. optical lens according to claim 1, which is characterized in that the 4th lens have positive light coke, object side Face and image side surface are convex surface.

8. optical lens according to claim 1, which is characterized in that the object side of the 6th lens is convex surface.

9. optical lens according to claim 1, which is characterized in that the object side of the 6th lens is concave surface.

10. optical lens according to claim 1, which is characterized in that the 6th lens are aspherical lens.

11. optical lens according to claim 1 to 10, which is characterized in that first lens and described Six lens are glass lens.

12. optical lens according to claim 1 to 10, which is characterized in that meet conditional: D/h/FOV≤ 0.03,

Wherein, FOV is the maximum field of view angle of the optical lens；

D is the maximum clear aperture of the first lens object side corresponding to optical lens maximum field of view angle；And

H is image height corresponding to optical lens maximum field of view angle.

13. optical lens according to claim 1 to 10, which is characterized in that the maximum view of the optical lens Image height h corresponding to rink corner degree FOV, the whole group focal length value F of the optical lens and optical lens maximum field of view angle it Between meet: (FOV × F)/h >=50.

14. optical lens according to claim 1 to 10, which is characterized in that the object side of first lens Center to distance TTL of the imaging surface on the optical axis of the optical lens and whole group focal length value F of the optical lens Between meet: TTL/F≤3.5.

15. optical lens according to claim 1 to 10, which is characterized in that meet conditional: BFL/TTL >= 0.15,

Wherein, BFL be the 6th lens image side surface center to the optical lens imaging surface on the optical axis Distance；And

TTL is the center of the object side of first lens to distance of the imaging surface on the optical axis of the optical lens.

It by object side to image side sequentially include: the first lens, the second lens, the third lens, the 4th along optical axis 16. optical lens Lens, the 5th lens and the 6th lens,

It is characterized in that,

First lens, the third lens and the 6th lens all have negative power；

Second lens, the 4th lens and the 5th lens all have positive light coke；

The third lens and the 4th lens glue are combined into balsaming lens；And

The center of the object side of first lens to the optical lens distance TTL and institute of the imaging surface on the optical axis It states and meets between the whole group focal length value F of optical lens: TTL/F≤3.5.

Technical field

This application involves a kind of optical lens, more specifically, this application involves a kind of optical lens including six-element lens.

Background technique

On-vehicle lens play very important role as " eyes " of automobile in vehicle-mounted DAS (Driver Assistant System), with The rapid development of science and technology, requirement of the people to on-vehicle lens are also higher and higher.High-resolution, miniaturization, under different operating environment Stability be always on-vehicle lens technical bottleneck, the popularization and application of on-vehicle lens makes people to the solution of on-vehicle lens at present Image force requirement is also higher and higher, from original mega pixel, is constantly promoted towards the direction 2M universal.

But as resolving power improves, corresponding camera lens volume and weight be will increase, camera lens resolving power and miniaturization Contradiction is increasingly prominent, and conventional forward sight on-vehicle lens front end bore is larger, angle is smaller, and field range is little, and if will Its overall length shortens, and the rear coke of whole system can become smaller, and CRA is caused to become larger, can not perfect matching chip, and be unfavorable for reality Border installation.Vehicle-carrying type steel optical lens more than mega pixel generallys use 6 pieces of eyeglasses at present, though solution picture is obviously improved compared with 5 pieces, But the increase of eyeglass, so that the miniaturization of camera lens is more difficult, thus, it is such for on-vehicle lens in changeable, rugged environment For lower work, the limited camera lens of installation space, on the basis of guaranteeing the stability under different operating environment, further promoted It is minimized, the direction of high-resolution becomes the main trend of on-vehicle lens development.

Summary of the invention

This application provides be applicable to vehicle-mounted installation, can at least overcome or part overcome it is in the prior art it is above-mentioned extremely The optical lens of a few defect.

The one aspect of the application provides such a optical lens, and the optical lens is along optical axis by object side to image side Sequentially can include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.Wherein, first thoroughly Mirror can have negative power, and object side is convex surface, and image side surface is concave surface；Second lens can have positive light coke, object side For convex surface；5th lens can have positive light coke, and object side and image side surface are convex surface；6th lens can have negative light focus Degree, image side surface are concave surface；And the third lens and the 4th lens can mutually gluing unit at balsaming lens.

In one embodiment, the object side of the first lens can be concave surface at distance light axis, can be convex at dipped beam axis Face, generally bi-concave shape.

In one embodiment, the first lens can be aspherical lens.

In one embodiment, the image side surface of the second lens can be convex surface.

In another embodiment, the image side surface of the second lens can be concave surface.

In one embodiment, the third lens can have negative power, and object side and image side surface can be concave surface.

In one embodiment, the 4th lens can have positive light coke, and object side and image side surface can be convex surface.

In one embodiment, the object side of the 6th lens can be convex surface.

In another embodiment, the object side of the 6th lens can be concave surface.

In one embodiment, the 6th lens can be aspherical lens.

In one embodiment, the first lens and the 6th lens can be glass lens.

In one embodiment, conditional can be met: D/h/FOV≤0.03, wherein FOV is the maximum of optical lens Field angle；D is the maximum clear aperture of the first lens object side corresponding to optical lens maximum field of view angle；And h is optics Image height corresponding to camera lens maximum field of view angle.

In one embodiment, the maximum field of view angle FOV of optical lens, the whole group focal length value F of optical lens and It can meet between image height h corresponding to optical lens maximum field of view angle: (FOV × F)/h >=50.

In one embodiment, the center of the object side of the first lens to optical lens imaging surface on optical axis away from It can meet between TTL and the whole group focal length value F of optical lens: TTL/F≤3.5.

In one embodiment, conditional can be met: BFL/TTL >=0.15, wherein BFL is the image side of the 6th lens The center in face to optical lens distance of the imaging surface on optical axis；And TTL is the center of the object side of the first lens to light Learn distance of the imaging surface of camera lens on optical axis.

The another aspect of the application provides such a optical lens, and the optical lens is along optical axis by object side to image side Sequentially can include: the first lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.Wherein, first thoroughly Mirror, the third lens and the 6th lens can have negative power；Second lens, the 4th lens and the 5th lens can have positive light Focal power；The third lens and the glue-bondable composition balsaming lens of the 4th lens；And first lens object side center to optical frames The imaging surface of head can meet between the distance TTL on optical axis and the whole group focal length value F of optical lens: TTL/F≤3.5.

In one embodiment, the object side of the first lens can be convex surface, and image side surface can be concave surface.Further, The object side of one lens is concave surface at distance light axis, is convex surface, generally bi-concave shape at dipped beam axis.

In one embodiment, the first lens can be aspherical lens.

In one embodiment, the object side of the second lens and image side surface can be convex surface.

In another embodiment, the object side of the second lens can be convex surface, and image side surface can be concave surface.

In one embodiment, the object side of the third lens and image side surface can be concave surface.

In one embodiment, the object side of the 4th lens and image side surface can be convex surface.

In one embodiment, the object side of the 5th lens and image side surface can be convex surface.

In one embodiment, the object side of the 6th lens can be convex surface, and image side surface can be concave surface.

In another embodiment, the object side of the 6th lens and image side surface can be concave surface.

In one embodiment, the 6th lens can be aspherical lens.

In one embodiment, the first lens and the 6th lens can be glass lens.

In one embodiment, conditional can be met: D/h/FOV≤0.03, wherein FOV is the maximum of optical lens Field angle；D is the maximum clear aperture of the first lens object side corresponding to optical lens maximum field of view angle；And h is optics Image height corresponding to camera lens maximum field of view angle.

In one embodiment, the maximum field of view angle FOV of optical lens, the whole group focal length value F of optical lens and It can meet between image height h corresponding to optical lens maximum field of view angle: (FOV × F)/h >=50.

In one embodiment, conditional can be met: BFL/TTL >=0.15, wherein BFL is the image side of the 6th lens The center in face to optical lens distance of the imaging surface on optical axis；And TTL is the center of the object side of the first lens to light Learn distance of the imaging surface of camera lens on optical axis.

The application uses such as six-element lens, by the shape of optimal setting eyeglass, the light focus of each eyeglass of reasonable distribution Degree and form balsaming lens etc., realize the small-bore miniaturization of optical lens, high-resolution, front end, long coking, big field angle, Chief ray angle (CRA) is small, back focal length, distort at least one beneficial effect such as big.

Detailed description of the invention

In conjunction with attached drawing, by the detailed description of following non-limiting embodiment, other features of the application, purpose and excellent Point will be apparent.In the accompanying drawings:

Fig. 1 is the structural schematic diagram for showing the optical lens according to the embodiment of the present application 1；

Fig. 2 is the structural schematic diagram for showing the optical lens according to the embodiment of the present application 2；And

Fig. 3 is the structural schematic diagram for showing the optical lens according to the embodiment of the present application 3.

Specific embodiment

Various aspects of the reference attached drawing to the application are made more detailed description by the application in order to better understand.It answers Understand, the only description to the illustrative embodiments of the application is described in detail in these, rather than limits the application in any way Range.In the specification, the identical element of identical reference numbers.Stating "and/or" includes associated institute Any and all combinations of one or more of list of items.

It should be noted that in the present specification, first, second, third, etc. statement is only used for a feature and another spy Sign distinguishes, without indicating any restrictions to feature.Therefore, without departing substantially from teachings of the present application, hereinafter The first lens discussed are also known as the second lens or the third lens, and it is glued saturating that the first balsaming lens is also known as second Mirror.

In the accompanying drawings, for ease of description, thickness, the size and shape of lens are slightly exaggerated.Specifically, attached drawing Shown in spherical surface or aspherical shape be illustrated by way of example.That is, spherical surface or aspherical shape are not limited to attached drawing Shown in spherical surface or aspherical shape.Attached drawing is merely illustrative and and non-critical drawn to scale.

Herein, near axis area refers to the region near optical axis.If lens surface is convex surface and does not define convex surface position When setting, then it represents that the lens surface is convex surface near axis area is less than；If lens surface is concave surface and does not define the concave surface position When, then it represents that the lens surface is concave surface near axis area is less than.Surface in each lens near object is known as object side, Surface in each lens near imaging surface is known as image side surface.

It will also be appreciated that term " comprising ", " including ", " having ", "comprising" and/or " including ", when in this theory It indicates there is stated feature, element and/or component when using in bright book, but does not preclude the presence or addition of one or more Other feature, component, assembly unit and/or their combination.In addition, ought the statement of such as at least one of " ... " appear in institute When after the list of column feature, entire listed feature is modified, rather than modifies the individual component in list.In addition, when describing this When the embodiment of application, " one or more embodiments of the application " are indicated using "available".Also, term " illustrative " It is intended to refer to example or illustration.

Unless otherwise defined, otherwise all terms (including technical terms and scientific words) used herein all have with The application one skilled in the art's is generally understood identical meaning.It will also be appreciated that term (such as in everyday words Term defined in allusion quotation) it should be interpreted as having and their consistent meanings of meaning in the context of the relevant technologies, and It will not be explained with idealization or excessively formal sense, unless clear herein so limit.

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The feature of the application, principle and other aspects are described in detail below.

Optical lens according to the application illustrative embodiments includes such as six lens with focal power, i.e., and first Lens, the second lens, the third lens, the 4th lens, the 5th lens and the 6th lens.This six lens along optical axis from object side to Image side sequential.

It can also further comprise the photosensitive member for being set to imaging surface according to the optical lens of the application illustrative embodiments Part.Optionally, the photosensitive element for being set to imaging surface can be photosensitive coupling element (CCD) or Complimentary Metal-Oxide semiconductor Element (CMOS).

First lens can have negative power, and object side can be convex surface, and image side surface can be concave surface.Further, first It is concave surface that lens, which may be configured as object side at distance light axis, and object side is convex surface at dipped beam axis, and image side surface is concave surface, i.e., first The generally bi-concave shape of lens.By the whole concave-concave to the first lens, the control of this special shape of center bent moon can subtract The front end bore of mini system, while realizing the long coking and big visual field of system.

Second lens can have positive light coke, and object side can be convex surface.The light that second lens can collect the first lens Line is compressed, and makes the smooth transition of light tendency to rear optical system.

The third lens can have negative power, and object side and image side surface can be concave surface.

4th lens can have positive light coke, and object side and image side surface can be convex surface.

5th lens can have positive light coke, and object side and image side surface can be convex surface.5th lens can be with converged light Line makes the light of diverging can smoothly enter into rear optical system, while can balance the spherical aberration introduced by front eyeglass, limited Image quality is promoted under overall length.

6th lens can have negative power, and image side surface can be concave surface.6th lens are divergent lens, before can dissipating Fang Huiju light, so that image space light is at ascendant trend, to realize the matching of large chip.Pass through the framework of above-mentioned camera lens entirety The effect, it can be achieved that CRA small is arranged in design and the shape of the 6th lens.

As it is known to the person skilled in the art, balsaming lens can be used for reducing color difference to the maximum extent or eliminate color difference.In The reflection loss that image quality can be improved using balsaming lens in optical lens, reduce light energy, to promote the clear of lens imaging Clear degree.In addition, the use of balsaming lens can also simplify the linkage editor in camera lens manufacturing process.

In the exemplary embodiment, can by by the object side of the image side surface of the third lens and the 4th lens gluing, and By the third lens and the 4th lens combination at balsaming lens.By introducing balsaming lens, it can help to eliminate color difference influence, reduce The tolerance sensitivities of system realize high-resolution；Meanwhile balsaming lens can be with residual fraction color difference with the whole of balance optical system Body colour is poor.The gluing of eyeglass can also omit the airspace between two lens, reduce system overall length, so that optical system overall It is compact, meet system compact demand.In addition, eyeglass it is glued reduce lens unit because generated during group is stood inclination/ The tolerance sensitivities problem such as core shift.

Wherein, in balsaming lens, the third lens close to object side have negative power, and the 4th lens close to image side have There is a positive light coke, such setting will can be transitioned into again rear after fast convergence after divergence of beam that front collects, be conducive to The reduction of rear ray traveling optical paths, to realize short TTL.

In the exemplary embodiment, can the light for limiting light beam be set for example between the second lens and the third lens Door screen, to further increase the image quality of camera lens.Diaphragm is arranged between the second lens and balsaming lens, can collect front and back light Line shortens optical system overall length, reduces front and back lens set bore.

In the exemplary embodiment, the maximum field of view angle FOV of optical lens, corresponding to optical lens maximum field of view angle It can meet between image height h corresponding to the maximum clear aperture D of first lens object side and optical lens maximum field of view angle: D/ H/FOV≤0.03, it is more desirable that D, h and FOV can further meet D/h/FOV≤0.025.Meet conditional D/h/FOV≤ 0.03, it is ensured that the front end of camera lens is small-bore.

In the exemplary embodiment, the maximum field of view angle FOV of optical lens, optical lens whole group focal length value F with And (FOV × F)/h >=50 can be met between image height h corresponding to optical lens maximum field of view angle, it is more desirable that F, h and FOV into One step can meet (FOV × F)/h >=55.Meet conditional (FOV × F)/h >=50, it is ensured that the long coking of camera lens, big visual field Angle.

In the exemplary embodiment, between the optics total length TTL of optical lens and the whole group focal length value of optical lens TTL/F≤3.5 can be met, further, TTL/F≤3.3 can be met.Meet conditional TTL/F≤3.5, it can be achieved that camera lens Small size performance.

In the exemplary embodiment, between the optic back focal BFL of optical lens and the optics total length TTL of optical lens BFL/TTL >=0.15 can be met, further, BFL and TTL can further meet BFL/TTL >=0.2.In conjunction with the optical frames The overall architecture of head meets the rear burnt setting of BFL/TTL >=0.15, it is ensured that and it is burnt after the length of camera lens, optical lens can be conducive to Installation.

In the exemplary embodiment, the first lens and/or the 6th lens can use aspherical lens.Aspherical lens The characteristics of be: be consecutive variations from center of lens to periphery curvature.With the spherical surface for having constant curvature from center of lens to periphery Eyeglass is different, and aspherical lens have more preferably radius of curvature characteristic, and there is improvement to distort aberration and improve the excellent of astigmatic image error Point.After aspherical lens, the aberration occurred when imaging can be eliminated as much as possible, to promote the imaging of camera lens Quality.First lens are set as aspherical lens, and solution picture not only can be improved, and can also reduce camera lens front end bore, reduce cost, subtract Tiny lens radial direction volume is advantageously implemented miniaturization, and the shape of the distance light axis concave-concave dipped beam axis bent moon by the first lens The performance to distort greatly and the center angular resolution of optical system overall is amplified may be implemented in design, to expand the view of optical lens It is wild.6th lens are set as aspherical lens, can reduce the light path that marginal ray reaches lens imaging face, can be with correction system Off-axis point aberration, the optical properties such as optimization distortion, CRA, promotes image quality.

In the exemplary embodiment, eyeglass used by optical lens can be the eyeglass of plastic material, can also be The eyeglass of glass material.Since the eyeglass thermal expansion coefficient of plastic material is larger, the variation of ambient temperature used in the camera lens compared with When big, the lens of plastic material can cause the optic back focal variable quantity of camera lens larger.And the eyeglass of glass material is used, it can reduce Temperature is to influence burnt after lens optical.It is desirable that can be adopted according to the first lens of the optical lens of the application and the 6th lens Reduce influence of the environment to system entirety, improving optical mirror with glass lens to enhance performance of the camera lens in high/low temperature The overall performance of head.Further, Glass aspheric eyeglass can be used in the first lens, before further promoting image quality and reducing Port diameter.

According to the optical lens of the above embodiment of the application, pass through Rational choice, the lens shape to lens materials Optimal setting, the reasonable distribution of focal power, guarantee camera lens miniaturization while, ensure that resolving power, imaging level is reachable 2M or more, further by the whole concave-concave to the first lens, the control of this special shape of center bent moon reduces system Front end bore, while realizing the long coking and big visual field of system.The architecture design of camera lens entirety and the shape of the 6th lens Effect, it can be achieved that CRA small is set, and high angle scattered light is not easy to reach on backend machine component, reduces the generation of veiling glare；Meanwhile energy Enough and chip more perfect matching, and guarantee back focal length in order to camera lens installation.

However, it will be understood by those of skill in the art that without departing from this application claims technical solution the case where Under, the lens numbers for constituting camera lens can be changed, to obtain each result and advantage described in this specification.Although for example, It is described by taking six lens as an example in embodiment, but the optical lens is not limited to include six lens.If desired, The optical lens may also include the lens of other quantity.

The specific embodiment for being applicable to the optical lens of above embodiment is further described with reference to the accompanying drawings.