阅读说明：本技术 光学镜头、摄像模组及电子设备 (Optical lens, camera module and electronic equipment ) 是由 关赛新 于 2021-09-10 设计创作，主要内容包括：本发明公开了一种光学镜头、摄像模组及电子设备,光学镜头包括沿光轴从物侧至像侧依次设置的第一镜组和第二镜组,第一镜组包括沿光轴从物侧至像侧依次胶合连接的第一基板和第一透镜,第二镜组具有正屈折力,第二镜组包括沿光轴从物侧至像侧依次胶合连接的第二透镜、第二基板和第三透镜,光学镜头满足以下关系式：18deg<FOV/Fno<33deg,其中,FOV为光学镜头的最大视场角,Fno为光学镜头的光圈数。由于该光学镜头满足关系式：18deg<FOV/Fno<33deg,该光学镜头在实现小型化的同时还具有较大的视场角,从而实现更广的拍摄范围,且还具有较大的光圈,从而可以增加单位时间内的进光量,进而可增大边缘视场的相对照度。(The invention discloses an optical lens, a camera module and electronic equipment, wherein the optical lens comprises a first lens group and a second lens group which are sequentially arranged from an object side to an image side along an optical axis, the first lens group comprises a first substrate and a first lens which are sequentially connected from the object side to the image side in a gluing mode along the optical axis, the second lens group has positive refractive power, the second lens group comprises a second lens, a second substrate and a third lens which are sequentially connected from the object side to the image side in a gluing mode along the optical axis, and the optical lens meets the following relational expression: 18deg < FOV/Fno <33deg, where FOV is the maximum field angle of the optical lens and Fno is the f-number of the optical lens. Because the optical lens satisfies the relation: the optical lens has the advantages that the optical lens is 18deg < FOV/Fno <33deg, the optical lens has a large field angle while realizing miniaturization, so that a wider shooting range is realized, in addition, the optical lens also has a large aperture, so that the light entering amount in unit time can be increased, and further, the relative illumination of the marginal field of view can be increased.)

1. An optical lens comprises a first lens group and a second lens group which are arranged along an optical axis from an object side to an image side in sequence;

the first lens group comprises a first substrate and a first lens, which are sequentially connected in a gluing manner from an object side to an image side along an optical axis;

the second lens group has positive refractive power and comprises a second lens, a second substrate and a third lens which are sequentially connected in a gluing mode from the object side to the image side along the optical axis;

the optical lens satisfies the following relation:

18deg<FOV/Fno<33deg；

wherein, the FOV is the maximum field angle of the optical lens, and the Fno is the f-number of the optical lens.

2. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

1.5<TTL/EFL<4.0；

wherein, TTL is a distance from an object side surface of the first lens group to an image plane of the optical lens on the optical axis, and EFL is an effective focal length of the optical lens.

3. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

0.95<ImgH/EFL<1.15；

wherein ImgH is the radius of the maximum effective imaging circle of the optical lens, and EFL is the effective focal length of the optical lens.

4. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

0.1mm<ET1<0.3mm；

ET1 is a distance between a maximum effective half aperture of the object-side surface of the first lens group and a maximum effective half aperture of the image-side surface of the first lens group in the optical axis direction.

5. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

0.1mm<ET2<0.45mm；

ET2 is a distance between a maximum effective half aperture of the object-side surface of the second lens group and a maximum effective half aperture of the image-side surface of the second lens group in the optical axis direction.

6. An optical lens according to claim 1, wherein the optical lens satisfies the following relation:

FOV＞80deg。

7. an optical lens barrel according to claim 1, wherein the object side surface of said first lens group is a plane surface, and the object side surface of said first lens group is provided with a plating layer.

8. An optical lens barrel according to any one of claims 1 to 7, wherein a fourth lens is cemented to the object side surface of the first substrate.

9. A camera module, comprising a photo sensor chip and the optical lens of any one of claims 1-8, wherein the photo sensor chip is disposed on an image side of the optical lens.

10. An electronic device, comprising a housing and the camera module of claim 9, wherein the camera module is disposed in the housing.

Technical Field

The invention relates to the technical field of optical imaging, in particular to an optical lens, a camera module and electronic equipment.

Background

Generally, an injection molding method is used for an optical lens, however, for an optical lens with a smaller size, such as an optical lens applied to an endoscope, a capsule lens, an industrial endoscope, and the like, a small-sized lens is required to form a small-sized optical lens, however, the field angle of the small-sized optical lens in the related art is often smaller. How to make an optical lens satisfy the requirement of a large field angle while realizing miniaturization is still a problem to be solved urgently.

Disclosure of Invention

The embodiment of the invention discloses an optical lens, a camera module and electronic equipment.

In order to achieve the above object, in a first aspect, an embodiment of the present invention discloses an optical lens, including a first lens group and a second lens group sequentially disposed from an object side to an image side along an optical axis;

the first lens group comprises a first substrate and a first lens, which are sequentially connected in a gluing manner from an object side to an image side along an optical axis;

the second lens group has positive refractive power and comprises a second lens, a second substrate and a third lens which are sequentially connected in a gluing mode from the object side to the image side along the optical axis;

the optical lens satisfies the following relation: 18deg < FOV/Fno <33deg, where FOV is the maximum field angle of the optical lens and Fno is the f-number of the optical lens. Through connecting first lens veneer in first base plate, with second lens and third lens veneer in the second base plate, the setting of first base plate and second base plate provides firm shaping environment for first group of mirrors and second group of mirrors, can tolerate bigger processing error to the processing sensitivity of first group of mirrors and second group of mirrors has been reduced. In addition, the second lens group has positive bending force, so that the light converging capacity is improved, the compact structure of the optical lens is favorably improved, and the miniaturization design of the optical lens is favorably realized. Further, the optical lens satisfies the relation: 18deg < FOV/Fno <33deg, and the optical lens has a larger angle of view, thereby realizing a wider shooting range and being capable of accurately capturing and identifying light and image positions. Moreover, when the relational expression is satisfied, the optical lens can be provided with a larger aperture, so that the light entering amount in unit time can be increased, the relative illumination of the marginal field of view can be increased, and the positions of light rays and images can be further accurately captured and identified.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 1.5< TTL/EFL <4.0, where TTL is a distance on the optical axis from an object-side surface of the first lens group to an image plane of the optical lens, and EFL is an effective focal length of the optical lens. The optical lens meets the condition that TTL/EFL is less than 4.0 and is more than 1.5, so that the ratio of the total length of the optical lens to the effective focal length of the optical lens is limited, the light and thin design and the large field angle effect of the optical lens are realized, and the shooting range of the optical lens is enlarged.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.95< ImgH/EFL <1.15, wherein ImgH is the radius of the maximum effective imaging circle of the optical lens and EFL is the effective focal length of the optical lens. Because optical lens satisfies 0.95< ImgH/EFL <1.15, then, this optical lens still has less focus and the radius of great the biggest effective imaging circle when having great angle of field to when being applied to the module of making a video recording, can support bigger size's photosensitive chip, and then make the module of making a video recording realize higher pixel formation of image, can carry out accurate seizure and discernment to light and image position, improve the imaging quality of the module of making a video recording.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.1mm < ET1<0.3mm, wherein ET1 is a distance from a maximum effective semi-aperture of the object-side surface of the first lens group to a maximum effective semi-aperture of the image-side surface of the first lens group in the optical axis direction, i.e. an edge thickness of the first lens group. When the optical lens satisfies the condition that the distance between the first lens group and the second lens group is 0.1mm < ET1<0.3mm, the edge thickness of the first lens group is smaller, so that the total length of the optical lens is favorably shortened, and the light and thin design of the optical lens is further realized.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: 0.1mm < ET2<0.45mm, wherein ET2 is a distance from a maximum effective semi-aperture of the object-side surface of the second lens group to a maximum effective semi-aperture of the image-side surface of the second lens group in the optical axis direction, i.e. an edge thickness of the second lens group. When the optical lens meets the requirement that the distance between the ET2 and the ET is less than 0.45mm, the edge thickness of the second lens group is smaller, so that the total length of the optical lens is favorably shortened, and the light and thin design of the optical lens is further realized.

As an alternative implementation, in an embodiment of the first aspect of the present invention, the optical lens satisfies the following relation: FOV > 80 deg. Thus, the optical lens has a large angle of view, thereby achieving a large shooting range.

As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the object-side surface of the first lens group is a plane, and the object-side surface of the first lens group is provided with a plating layer. Like this, through being equipped with the cladding material at the object side of first mirror group, this cladding material can be the infrared filter layer to can filter the light such as other wave bands such as infrared light, and only let visible light pass through, can improve the light filtering effect on the one hand, on the other hand need not additionally to increase the light filter, is favorable to practicing thrift optical lens's cost.

As an alternative implementation, in an embodiment of the first aspect of the invention, the object side surface of the first substrate is glued with a fourth lens. Thus, the object-side surface of the fourth lens element is the object-side surface of the first lens group, and the object-side surface of the fourth lens element can be concave, convex or planar, thereby facilitating the adjustment of the optical performance of the optical lens assembly.

In a second aspect, the present invention discloses a camera module, which includes a photosensitive chip and the optical lens according to the first aspect, wherein the photosensitive chip is disposed on an image side of the optical lens. The image pickup module having the optical lens according to the first aspect has all the technical effects of the optical lens, that is, the optical lens has low processing sensitivity, and the optical lens has a large field angle while realizing a miniaturized design of the optical lens, thereby realizing a wider shooting range. Meanwhile, the optical lens is also provided with a larger aperture, so that the light entering amount in unit time can be increased, the relative illumination of the marginal field of view can be increased, and the positions of light rays and images can be further accurately captured and identified.

In a third aspect, the present invention discloses an electronic device, which includes a housing and the camera module set according to the second aspect, wherein the camera module set is disposed on the housing. The electronic device having the camera module according to the second aspect also has all the technical effects of the optical lens. That is, the optical lens of the electronic device has low processing sensitivity, and has a large angle of view while realizing a compact design of the optical lens, thereby realizing a wider photographing range. Meanwhile, the optical lens is also provided with a larger aperture, so that the light entering amount in unit time can be increased, the relative illumination of the marginal field of view can be increased, and the positions of light rays and images can be further accurately captured and identified.

Compared with the prior art, the embodiment of the invention has the beneficial effects that:

by adopting the optical lens, the camera module and the electronic equipment provided by the embodiment, the optical lens comprises two lens groups formed by gluing the substrate and the lens, so that the processing sensitivity of the optical lens can be reduced, and the miniaturization design of the optical lens can be realized. Further, the optical lens satisfies the relation: 18deg < FOV/Fno <33deg, and the optical lens has a larger angle of view, thereby realizing a wider shooting range and being capable of accurately capturing and identifying light and image positions. Moreover, when the relational expression is satisfied, the optical lens can be provided with a larger aperture, so that the light entering amount in unit time can be increased, the relative illumination of the marginal field of view can be increased, and the positions of light rays and images can be further accurately captured and identified.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an optical lens disclosed in a first embodiment of the present application;

fig. 2 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 3 is a schematic structural diagram of an optical lens disclosed in the second embodiment of the present application;

fig. 4 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 5 is a schematic structural diagram of an optical lens disclosed in the third embodiment of the present application;

fig. 6 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 7 is a schematic structural diagram of an optical lens disclosed in a fourth embodiment of the present application;

fig. 8 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 9 is a schematic structural diagram of an optical lens disclosed in a fifth embodiment of the present application;

fig. 10 is a light ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 11 is a schematic structural diagram of an optical lens disclosed in a sixth embodiment of the present application;

fig. 12 is a ray spherical aberration diagram (mm), an astigmatism diagram (mm), and a distortion diagram (%);

fig. 13 is a schematic structural diagram of the camera module disclosed in the present application;

fig. 14 is a schematic structural diagram of an electronic device disclosed in the present application.

Detailed Description

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

The technical solution of the present invention will be further described with reference to the following embodiments and the accompanying drawings.

Referring to fig. 1 to 2, an optical lens 100 includes a first lens group L1 and a second lens group L2 disposed in order from an object side to an image side along an optical axis o, the first lens group L1 includes a first substrate L11 and a first lens L12 cemented in order from the object side to the image side along the optical axis o, and the second lens group L2 includes a second lens L21, a second substrate L22, and a third lens L23 cemented in order from the object side to the image side along the optical axis o. During imaging, light rays sequentially enter the first lens group L1 and the second lens group L2 from the object side of the first lens group L1, and finally form an image on the image plane 101 of the optical lens 100. Wherein the first lens group L1 has refractive power (e.g. positive refractive power or negative refractive power), and the second lens group L2 has positive refractive power. The arrangement of first lens group L11 and second lens group L22 provides a stable molding environment for first lens group L1 and second lens group L2 by adhesively bonding first lens L12 to first substrate L11, and second lens L21 and third lens L23 to second substrate L22, which can allow for larger processing errors, thereby reducing the processing sensitivity of first lens group L1 and second lens group L2. In addition, since the second lens group L2 has positive refractive power, the light converging capability is improved, which is beneficial to improving the compact structure of the optical lens 100 and the miniaturization design of the optical lens 100. In addition, the optical lens 100 includes a smaller number of lenses, which is beneficial to reducing the cost of the lenses.

Alternatively, the first substrate L11 and the second substrate L22 may be glass substrates, such that when the first lens group L1 and the second lens group L2 are processed, the first lens L12, the second lens L21, and the third lens L23 are formed first, then the first lens L12 is bonded to the first substrate L11, and the second lens L21 and the third lens L23 are bonded to two sides of the second substrate L22 respectively. Like this, can connect a plurality of lens veneer in glass substrate, then cut into a plurality of miniaturized mirror groups, promptly, can form a plurality of mirror groups on a glass substrate to be convenient for mass production is favorable to improving the machining efficiency of mirror group, and then improves optical lens 100's production efficiency.

Further, the first lens L12, the second lens L21, and the third lens L23 may be formed by etching or nanoimprinting, so as to facilitate miniaturization of the first lens L12, the second lens L21, and the third lens L23, and further achieve miniaturization of the optical lens 100.

In combination with the above, the lenses may be formed by a semiconductor process, that is, a plurality of lenses are formed on the wafer by an etching or nano-imprinting process, and then the two wafers are aligned and bonded to the substrate, so that the plurality of lenses on the two wafers are aligned and bonded, and finally a plurality of lens groups are formed by cutting. Thus, the optical lens 100 can be miniaturized, and mass production can be facilitated, so that production efficiency can be improved.

In an alternative mode, the object-side surface S2 of the first substrate L11 is not cemented with other lenses, i.e., the object-side surface S2 of the first substrate L11 is the object-side surface of the first lens group L1. Therefore, the first lens group L1 only includes the first substrate L11 and two layers of lens materials of the first lens L12 glued on the first substrate L11, which not only can reduce the material cost of the first lens group L1, but also makes the processing sensitivity of the first lens group L1 lower, thereby being beneficial to improving the manufacturing yield of the first lens group L1.

In another alternative, the object side S2 of the first substrate L11 is cemented with the fourth lens L13. Thus, the object-side surface S1 of the fourth lens element L13 is the object-side surface of the first lens group L1, and the object-side surface S1 of the fourth lens element L13 can be concave, convex or planar, so as to adjust the optical performance of the optical lens system 100.

It can be understood that the materials of the fourth lens element L13, the first substrate L11, the first lens element L12, the second substrate L22, the second lens element L21, and the third lens element L23 of the first lens group L1 can be plastic or glass, and when the glass material is used, the optical lens system 100 has good optical effect and the influence of temperature on the above lens groups can be reduced. When a plastic material is used, the entire weight of the optical lens 100 can be reduced.

In some embodiments, the optical lens 100 further includes a stop 102, and the stop 102 may be an aperture stop or a field stop, which may be disposed between the object side of the optical lens 100 and the object side of the first lens group L1. It is understood that, in other embodiments, the stop 102 may also be disposed between the first lens group L1 and the second lens group L2, and the position of the stop 102 may be adjusted according to practical situations, which is not specifically limited in this embodiment.

In some embodiments, the surface of the first lens L12 facing away from the first substrate L11, the surface of the second lens L21 facing away from the second substrate L22, and the surface of the third lens L23 facing away from the substrates may be aspheric or spherical, and may be specifically configured according to imaging requirements, which is not specifically limited in this embodiment.

As shown in fig. 3, optionally, the object-side surface of the first lens group L1 is a plane, and the object-side surface of the first lens group L1 is plated. Specifically, when first lens group L1 does not include fourth lens element L13, object-side surface S2 of first substrate L11 is the object-side surface of first lens group L1, object-side surface S2 of first substrate L11 is a plane, object-side surface S2 of first substrate L11 is plated, when first lens group L1 includes fourth lens element L13, object-side surface S1 of fourth lens element L13 is the object-side surface of first lens group L1, object-side surface S1 of fourth lens element L13 is a plane, that is, fourth lens element L13 is a flat plate, and object-side surface S1 of fourth lens element L13 is plated. Like this, through being equipped with the cladding material at first mirror group L1's object side, this cladding material can be infrared filter layer to can filter out the light such as other wave bands such as infrared light, and only let visible light pass through, can improve the filtering effect on the one hand, on the other hand need not additionally to increase the light filter, is favorable to practicing thrift optical lens's cost. It is understood that, since the object-side surface of the first lens group L1 is a plane, when the first substrate L11 or the fourth lens element L13 is made of glass, the first substrate L11 or the fourth lens element L13 can directly serve as the protective glass of the optical lens assembly 100.

In some embodiments, the optical lens assembly 100 further includes a filter L3, such as an infrared filter, and the infrared filter L3 is disposed between the image-side surface of the second lens group L2 (i.e., the image-side surface S9 of the third lens element L23) and the image plane 101 of the optical lens assembly 100, so as to filter out light in other wavelength bands, such as infrared light, and only allow visible light to pass through, thereby improving the filtering effect.

In some embodiments, the optical lens 100 satisfies the following relationship: 18deg < FOV/Fno <33deg, where FOV is the maximum field angle of the optical lens 100 and Fno is the f-number of the optical lens 100. When the optical lens 100 satisfies the relation 18deg < FOV/Fno <33deg, the optical lens 100 can be miniaturized and the optical lens 100 has a larger aperture, so that the light incident amount in a unit time can be increased, and the relative illumination of the marginal field of view can be increased, thereby further accurately capturing and identifying the positions of the light and the image. When the FOV/Fno is larger than or equal to 33deg, the optical lens 100 has a larger field angle and a smaller f-number, so that the f-number of the optical lens 100 is small when the field angle is large, thereby resulting in a smaller amount of incident light per unit time, a smaller relative illumination of the marginal field of view, and a lower accuracy of capturing and identifying the positions of light and images. When the FOV/Fno is less than or equal to 18deg, the field angle of the optical lens 100 is smaller, so that the shooting range of the optical lens 100 is smaller.

In some embodiments, the optical lens 100 satisfies the following relationship: FOV > 80 deg. Thus, the optical lens 100 has a large angle of view, thereby realizing a large photographing range.

In some embodiments, the optical lens 100 satisfies the following relationship: 1.5< TTL/EFL <4.0, where TTL is the distance from the object-side surface of the first lens group L1 to the image plane 101 of the optical lens 100 on the optical axis o, and EFL is the effective focal length of the optical lens 100. Since the optical lens 100 satisfies 1.5< TTL/EFL <4.0, a ratio of a total length of the optical lens 100 to an effective focal length of the optical lens 100 is limited, and a light and thin design and a large field angle effect of the optical lens 100 are achieved to increase a shooting range of the optical lens 100. When TTL/EFL is less than or equal to 1.5, the total length of the optical lens 100 is longer, and the effective focal length is larger, so that the field angle of the optical lens 100 is smaller, resulting in a smaller shooting range. When TTL/EFL is greater than or equal to 4.0, the total optical length of the optical lens 100 is too large, which is not favorable for the miniaturization design of the optical lens 100, and the focal length of the optical lens 100 is smaller, so that the field angle of the optical lens 100 is too large, the sensitivity of the optical lens 100 is increased, the distortion is too large, which is not favorable for the imaging of the optical lens 100.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.95< ImgH/EFL <1.15, where ImgH is the radius of the largest effective imaging circle of the optical lens 100. Because the optical lens 100 satisfies 0.95< ImgH/EFL <1.15, the optical lens 100 has a larger field angle and also has a smaller focal length and a larger radius of a maximum effective imaging circle, so that when the optical lens 100 is applied to a camera module, a larger-size photosensitive chip can be supported, and then the camera module realizes higher pixel imaging, light and image positions can be accurately captured and identified, and the imaging quality of the camera module is improved. When ImgH/EFL is greater than or equal to 1.15, the focal length of the optical lens 100 is too small to meet the requirement of long-range shooting, and it is not favorable for light to better converge on the image plane 101, so that it is difficult to achieve a good shooting effect. When ImgH/EFL is less than or equal to 0.95, the radius of the maximum effective imaging circle of the optical lens 100 is too small to match with a photosensitive chip with high pixels, so that high-pixel imaging is difficult to realize.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.1mm < ET1<0.3mm, where ET1 is the distance from the maximum effective half aperture of the object-side surface of the first lens group L1 to the maximum effective half aperture of the image-side surface of the first lens group L1 (i.e., the image-side surface S5 of the first lens L12) in the optical axis o direction, i.e., ET1 is the edge thickness of the first lens group L1. When the optical lens 100 satisfies 0.1mm < ET1<0.3mm, the edge thickness of the first lens group L1 is smaller, which is beneficial to shortening the total length of the optical lens 100, and further realizes the light and thin design of the optical lens 100. When ET1 is greater than or equal to 0.3mm, the edge thickness of the first lens group L1 is thick, which results in a larger total length of the optical lens 100, and is not favorable for the light and thin design of the optical lens 100. When ET1 is less than or equal to 0.1mm, the thickness of the first substrate L11 is less than 0.1mm, and the thickness of the first substrate L11 is too thin and is easy to break, thereby causing high production difficulty.

In some embodiments, the optical lens 100 satisfies the following relationship: 0.1mm < ET2<0.45mm, where ET2 is the distance in the optical axis o direction from the maximum effective half aperture of the object-side surface of second lens group L2 (i.e. object-side surface S6 of second lens L21) to the maximum effective half aperture of the image-side surface of second lens group L2 (i.e. image-side surface S9 of third lens L23), i.e. ET2 is the edge thickness of second lens group L2. When the optical lens 100 satisfies 0.1mm < ET2<0.45mm, the edge thickness of the second lens group L2 is smaller, which is beneficial to shortening the total length of the optical lens 100, and further realizes the light and thin design of the optical lens 100. When ET2 is greater than or equal to 0.45mm, the edge thickness of the second lens group L2 is thicker, which results in a larger total length of the optical lens 100, and is not favorable for the light and thin design of the optical lens 100. When ET2 is less than or equal to 0.1mm, the thickness of the second substrate L22 is less than 0.1mm, and the thickness of the first substrate L22 is too thin and is easy to break, thereby causing high production difficulty. .

The optical lens 100 of the present embodiment will be described in detail with reference to specific parameters.

First embodiment

As shown in fig. 1, fig. 1 is a schematic structural diagram of an optical lens 100 disclosed in the first embodiment of the present application. The optical lens 100 includes a stop 102, a first lens group L1, a second lens group L2, and a filter L3 sequentially disposed along an optical axis o from an object side to an image side, wherein the first lens group L1 includes a fourth lens L13, a first substrate L11, and a first lens L12 sequentially cemented together along the optical axis o from the object side to the image side, and the second lens group L2 includes a second lens L21, a second substrate L22, and a third lens L23 sequentially cemented together along the optical axis o from the object side to the image side. The materials of the first substrate L11, the second substrate L22, the first lens L12, the second lens L21, the third lens L23, and the fourth lens L13 can be referred to the above specific embodiments, and are not described herein again.

Furthermore, the first lens group L1 has negative refractive power, and the second lens group L2 has positive refractive power.

Furthermore, the object-side surface S1 of the fourth lens element L13 is concave at the paraxial region o, the object-side surface S2 of the first substrate L11 is planar at the paraxial region o, the object-side surface S4 and the image-side surface S5 of the first lens element L12 are respectively planar and concave at the paraxial region o, the object-side surface S6 of the second lens element L21 is convex at the paraxial region o, the object-side surface S7 of the second substrate L22 is planar at the paraxial region o, and the object-side surface S8 and the image-side surface S9 of the third lens element L23 are respectively planar and concave at the paraxial region o.

Specifically, other parameters of the optical lens 100 are given in table 1 below, taking as examples that the effective focal length f of the optical lens 100 is 0.522mm, the aperture size FNO of the optical lens 100 is 3.5, the field angle FOV of the optical lens 100 is 108.24deg, and the total optical length TTL of the optical lens 100 is 1.07 mm. The elements of the optical lens 100 from the object side to the image side along the optical axis o are arranged in the order of the elements from top to bottom in table 1. The surface numbers are from small to large respectively the object side surface S1 of the fourth lens L13, the object side surface S2 of the first substrate L11, the object side surface S4 and the image side surface S5 of the first lens L12, the object side surface S6 of the second lens L21, the object side surface S7 of the second substrate L22, the object side surface S8 and the image side surface S9 of the third lens L23. For example, the surface numbers 2 and 3 correspond to the object side surface S1 of the fourth lens L13 and the object side surface S2 of the first substrate L11, respectively. The Y radius in table 1 is the radius of curvature of the object-side or image-side surface of the respective surface number at the paraxial region o. The first value in the "thickness" parameter set of a lens is the thickness of the lens on the optical axis o, and the second value is the distance from the image-side surface to the back surface of the lens on the optical axis o. The numerical value of the stop 102 in the "thickness" parameter column is the distance from the stop 102 to the vertex of the next surface (the vertex refers to the intersection point of the surface and the optical axis o) on the optical axis o, the direction from the object side to the image side of the last lens of the first lens L12 is defined as the positive direction of the optical axis o, when the value is negative, it indicates that the stop 102 is disposed on the right side of the vertex of the next surface, and if the thickness of the stop 102 is positive, the stop 102 is disposed on the left side of the vertex of the next surface. It is understood that the units of the radius Y, thickness, and focal length in table 1 are all mm. The reference wavelength of the refractive index and Abbe number of each lens in Table 1 was 587.6nm, and the reference wavelength of the effective focal length was 546 nm.

TABLE 1

In the first embodiment, the object-side surface S1 of the fourth lens L13, the image-side surface S5 of the first lens L12, the object-side surface S6 of the second lens L21, and the image-side surface S9 of the third lens L23 are all aspheric surfaces, and the surface shape x of each aspheric surface lens can be defined by, but is not limited to, the following aspheric surface formula:

wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis o direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius R of Y in table 1 above); k is a conic coefficient; ai is a correction coefficient corresponding to the high-order term of the ith aspheric term. Table 2 shows the high-order term coefficients a4, a6, A8, a10, a12, a14, and a16 that can be used for the respective aspherical mirror surfaces S2, S5, S6, and S9 in the first embodiment.

TABLE 2

Referring to fig. 2 (a), fig. 2 (a) shows a light spherical aberration curve of the optical lens 100 in the first embodiment at wavelengths of 470nm, 510nm, 546nm, 610nm and 656.3 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from fig. 2 (a), the spherical aberration value of the optical lens 100 in the first embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 2 (B), fig. 2 (B) is a diagram of astigmatism of light of the optical lens 100 in the first embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 2 that the astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 2 (C), fig. 2 (C) is a distortion curve diagram of the optical lens 100 in the first embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 2, the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Second embodiment

As shown in fig. 3, fig. 3 is a schematic structural diagram of an optical lens 100 disclosed in the second embodiment of the present application. The optical lens 100 includes a stop 102, a first lens group L1, a second lens group L2, and a filter L3 disposed in order from an object side to an image side along an optical axis o, wherein the first lens group L1 includes a first substrate L11 and a first lens L12 cemented in order from the object side to the image side along the optical axis o, and the second lens group L2 includes a second lens L21, a second substrate L22, and a third lens L23 cemented in order from the object side to the image side along the optical axis o. The materials of the first substrate L11, the second substrate L22, the first lens L12, the second lens L21, and the third lens L23 can be found in the above embodiments, and are not described herein again.

Furthermore, the first lens group L1 has negative refractive power, and the second lens group L2 has positive refractive power.

Furthermore, the object-side surface S2 and the image-side surface S3 of the first substrate L11 are planar at the paraxial region o, the object-side surface S4 and the image-side surface S5 of the first lens element L12 are planar and concave at the paraxial region o, the object-side surface S6 of the second lens element L21 is convex at the paraxial region o, the object-side surface S7 of the second substrate L22 is planar at the paraxial region o, and the object-side surface S8 and the image-side surface S9 of the third lens element L23 are planar and concave at the paraxial region o.

In the second embodiment, the effective focal length f of the optical lens 100 is 0.518mm, the aperture size FNO of the optical lens 100 is 3.5, the FOV of the field angle of the optical lens 100 is 109.38deg, and the total optical length TTL of the optical lens 100 is 1.061mm, for example.

Other parameters in the second embodiment are given in the following table 3, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. The object-side surface S2 of the first substrate L11, the image-side surface S3 of the first substrate L11, the object-side surface S4 of the first lens L12, the image-side surface S5, the object-side surface S6 of the second lens L21, the object-side surface S7 of the second substrate L22, the object-side surface S8 of the third lens L23, and the image-side surface S9 are numbered from small to large. It is understood that the units of the radius Y, thickness, and focal length in table 3 are all mm. The reference wavelength of refractive index and Abbe number of each lens in Table 3 was 587.6nm, and the reference wavelength of effective focal length was 546 nm.

TABLE 3

In the second embodiment, table 4 gives the high-order term coefficients that can be used for each aspherical mirror surface in the second embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.

TABLE 4

Referring to fig. 4 (a), fig. 4 (a) shows a light spherical aberration curve of the optical lens 100 in the second embodiment at wavelengths of 460nm, 510nm, 546nm, 610nm and 656.3 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 4, the spherical aberration value of the optical lens 100 in the second embodiment is better, which illustrates that the imaging quality of the optical lens 100 in the present embodiment is better.

Referring to fig. 4 (B), fig. 4 (B) is a diagram of astigmatism of light of the optical lens 100 in the second embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 4 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 4 (C), fig. 4 (C) is a distortion curve diagram of the optical lens 100 in the second embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 4, the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Third embodiment

As shown in fig. 5, fig. 5 is a schematic structural diagram of an optical lens 100 disclosed in the third embodiment of the present application. The optical lens 100 includes a stop 102, a first lens group L1, a second lens group L2, and a filter L3 sequentially disposed from an object side to an image side along an optical axis o, wherein the first lens group L1 includes a fourth lens L13, a first substrate L11, and a first lens L12 cemented together sequentially from the object side to the image side along the optical axis o, and the second lens group L2 includes a second lens L21, a second substrate L22, and a third lens L23 cemented together sequentially from the object side to the image side along the optical axis o. The materials of the first substrate L11, the second substrate L22, the first lens L12, the second lens L21, the third lens L23, and the fourth lens L13 can be referred to the above specific embodiments, and are not described herein again.

Furthermore, both the first lens group L1 and the second lens group L2 have positive refractive power.

Furthermore, the object-side surface S1 of the fourth lens element L13 is concave at the paraxial region o, the object-side surface S2 of the first substrate L11 is planar at the paraxial region o, the object-side surface S4 and the image-side surface S5 of the first lens element L12 are respectively planar and convex at the paraxial region o, the object-side surface S6 of the second lens element L21 is concave at the paraxial region o, the object-side surface S7 of the second substrate L22 is planar at the paraxial region o, and the object-side surface S8 and the image-side surface S9 of the third lens element L23 are respectively planar and convex at the paraxial region o.

In the third embodiment, the effective focal length f of the optical lens 100 is 0.49mm, the aperture size FNO of the optical lens 100 is 3.5, the FOV of the field angle of the optical lens 100 is 115.14deg, and the total optical length TTL of the optical lens 100 is 1.286mm, for example. Other parameters in the third embodiment are given in the following table 5, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. The surface numbers of the first lens L13, the second lens L13, the third lens L6356, and the fourth lens L13 are, from small to large, an object side surface S1, an object side surface S2 of the first substrate L11, an object side surface S4 of the first lens L12, an image side surface S5, an object side surface S6 of the second lens L21, an object side surface S7 of the second substrate L22, an object side surface S8 of the third lens L23, and an image side surface S9. For example, the surface numbers 2 and 3 correspond to the object side surface S1 of the fourth lens L13 and the object side surface S2 of the first substrate L11, respectively. It is understood that the units of the radius Y, thickness, and focal length in table 5 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 5 was 587.6nm, and the reference wavelength of effective focal length was 546 nm.

TABLE 5

In the third embodiment, table 6 gives the high-order term coefficients that can be used for each aspherical mirror surface in the third embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.

TABLE 6

Referring to fig. 6 (a), fig. 6 (a) shows a light spherical aberration curve of the optical lens 100 in the third embodiment at wavelengths of 460nm, 510nm, 546nm, 610nm and 656.3 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 6, the spherical aberration value of the optical lens 100 in the third embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 6 (B), fig. 6 (B) is a diagram of astigmatism of light of the optical lens 100 in the third embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 6 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 6 (C), fig. 6 (C) is a distortion curve diagram of the optical lens 100 in the third embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 6, the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Fourth embodiment

As shown in fig. 7, fig. 7 is a schematic structural diagram of an optical lens 100 disclosed in the fourth embodiment of the present application. The optical lens 100 includes a stop 102, a first lens group L1, a second lens group L2, and a filter L3 sequentially disposed from an object side to an image side along an optical axis o, wherein the first lens group L1 includes a fourth lens L13, a first substrate L11, and a first lens L12 cemented together sequentially from the object side to the image side along the optical axis o, and the second lens group L2 includes a second lens L21, a second substrate L22, and a third lens L23 cemented together sequentially from the object side to the image side along the optical axis o. The materials of the first substrate L11, the second substrate L22, the first lens L12, the second lens L21, the third lens L23, and the fourth lens L13 can be referred to the above specific embodiments, and are not described herein again.

Furthermore, both the first lens group L1 and the second lens group L2 have positive refractive power.

Furthermore, the object-side surface S1 of the fourth lens element L13 is convex at the paraxial region o, the object-side surface S2 of the first substrate L11 is planar at the paraxial region o, the object-side surface S4 and the image-side surface S5 of the first lens element L12 are respectively planar and convex at the paraxial region o, the object-side surface S6 of the second lens element L21 is convex at the paraxial region o, the object-side surface S7 of the second substrate L22 is planar at the paraxial region o, and the object-side surface S8 and the image-side surface S9 of the third lens element L23 are respectively planar and concave at the paraxial region o.

In the fourth embodiment, the effective focal length f of the optical lens 100 is 0.55mm, the aperture size FNO of the optical lens 100 is 3.5, the FOV of the field angle of the optical lens 100 is 107.2deg, and the total optical length TTL of the optical lens 100 is 1.016mm, for example. The surface numbers of the first lens L13, the second lens L13, the third lens L6356, and the fourth lens L13 are, from small to large, an object side surface S1, an object side surface S2 of the first substrate L11, an object side surface S4 of the first lens L12, an image side surface S5, an object side surface S6 of the second lens L21, an object side surface S7 of the second substrate L22, an object side surface S8 of the third lens L23, and an image side surface S9. For example, the surface numbers 2 and 3 correspond to the object side surface S1 of the fourth lens L13 and the object side surface S2 of the first substrate L11, respectively. Other parameters in the fourth embodiment are shown in the following table 7, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. It is understood that the units of the radius Y, thickness, and focal length in table 7 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 7 was 587.6nm, and the reference wavelength of effective focal length was 546 nm.

TABLE 7

In the fourth embodiment, table 8 gives the high-order term coefficients that can be used for each aspherical mirror surface in the fourth embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.

TABLE 8

Referring to fig. 8 (a), fig. 8 (a) shows a light spherical aberration curve of the optical lens 100 in the fourth embodiment at wavelengths of 460nm, 510nm, 546nm, 610nm and 656.3 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 8, the spherical aberration value of the optical lens 100 in the fourth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 8 (B), fig. 8 (B) is a diagram of astigmatism of light of the optical lens 100 in the fourth embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 8 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 8 (C), fig. 8 (C) is a distortion curve diagram of the optical lens 100 in the fourth embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 8, the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Fifth embodiment

As shown in fig. 9, fig. 9 is a schematic structural diagram of an optical lens 100 disclosed in the fifth embodiment of the present application. The optical lens 100 includes a first lens group L1, a stop 102, a second lens group L2, and a filter L3 sequentially disposed from an object side to an image side along an optical axis o, wherein the first lens group L1 includes a fourth lens L13, a first substrate L11, and a first lens L12 sequentially cemented from the object side to the image side along the optical axis o, and the second lens group L2 includes a second lens L21, a second substrate L22, and a third lens L23 sequentially cemented from the object side to the image side along the optical axis o. The materials of the first substrate L11, the second substrate L22, the first lens L12, the second lens L21, the third lens L23, and the fourth lens L13 can be referred to the above specific embodiments, and are not described herein again.

Further, the first lens group L1 and the second lens group L2 have negative refractive power and positive refractive power, respectively.

Furthermore, the object-side surface S1 of the fourth lens element L13 is convex at the paraxial region o, the object-side surface S2 of the first substrate L11 is planar at the paraxial region o, the object-side surface S4 and the image-side surface S5 of the first lens element L12 are respectively planar and concave at the paraxial region o, the object-side surface S6 of the second lens element L21 is convex at the paraxial region o, the object-side surface S7 of the second substrate L22 is planar at the paraxial region o, and the object-side surface S8 and the image-side surface S9 of the third lens element L23 are respectively planar and convex at the paraxial region o.

In the fifth embodiment, the effective focal length f of the optical lens 100 is 0.52mm, the aperture size FNO of the optical lens 100 is 3.5, the FOV of the field angle of the optical lens 100 is 109.9deg, and the total optical length TTL of the optical lens 100 is 1.7mm, for example. Other parameters in the fifth embodiment are shown in the following table 9, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. The surface numbers of the first lens L13, the second lens L13, the third lens L6356, and the fourth lens L13 are, from small to large, an object side surface S1, an object side surface S2 of the first substrate L11, an object side surface S4 of the first lens L12, an image side surface S5, an object side surface S6 of the second lens L21, an object side surface S7 of the second substrate L22, an object side surface S8 of the third lens L23, and an image side surface S9. For example, the surface numbers 1 and 2 correspond to the object side surface S1 of the fourth lens L13 and the object side surface S2 of the first substrate L11, respectively. It is understood that the units of the radius Y, thickness, and focal length in table 9 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 9 was 587.6nm, and the reference wavelength of effective focal length was 546 nm.

TABLE 9

In the fifth embodiment, table 10 gives the high-order term coefficients that can be used for each aspherical mirror surface in the fifth embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.

Watch 10

Referring to fig. 10 (a), fig. 10 (a) shows a light spherical aberration curve of the optical lens 100 in the fifth embodiment at wavelengths of 460nm, 510nm, 546nm, 610nm and 656.3 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 10, the spherical aberration value of the optical lens 100 in the fifth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 10 (B), fig. 10 (B) is a diagram of astigmatism of light of the optical lens 100 in the fifth embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 10 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 10 (C), fig. 10 (C) is a distortion curve diagram of the optical lens 100 in the fifth embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 10, the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Sixth embodiment

As shown in fig. 11, fig. 11 is a schematic structural diagram of an optical lens 100 disclosed in a sixth embodiment of the present application. The optical lens 100 includes a first lens group L1, a stop 102, a second lens group L2, and a filter L3 disposed in order from an object side to an image side along an optical axis o, wherein the first lens group L1 includes a first substrate L11 and a first lens L12 cemented in order from the object side to the image side along the optical axis o, and the second lens group L2 includes a second lens L21, a second substrate L22, and a third lens L23 cemented in order from the object side to the image side along the optical axis o. The materials of the first substrate L11, the second substrate L22, the first lens L12, the second lens L21, and the third lens L23 can be found in the above embodiments, and are not described herein again.

Further, the first lens group L1 and the second lens group L2 have negative refractive power and positive refractive power, respectively.

Furthermore, the object-side surface S2 and the image-side surface S3 of the first substrate L11 are both planar at the paraxial region o, the object-side surface S4 and the image-side surface S5 of the first lens element L12 are respectively planar and concave at the paraxial region o, the object-side surface S6 of the second lens element L21 is convex at the paraxial region o, the object-side surface S7 of the second substrate L22 is planar at the paraxial region o, and the object-side surface S8 and the image-side surface S9 of the third lens element L23 are respectively planar and convex at the paraxial region o.

In the sixth embodiment, the effective focal length f of the optical lens 100 is 0.55mm, the aperture size FNO of the optical lens 100 is 3.5, the FOV of the field angle of the optical lens 100 is 108.22deg, and the total optical length TTL of the optical lens 100 is 1.598mm, for example. Other parameters in the sixth embodiment are given in the following table 11, and the definitions of the parameters can be obtained from the description of the foregoing embodiments, which are not repeated herein. The object-side surface S2 of the first substrate L11, the image-side surface S3 of the first substrate L11, the object-side surface S4 of the first lens L12, the image-side surface S5, the object-side surface S6 of the second lens L21, the object-side surface S7 of the second substrate L22, the object-side surface S8 of the third lens L23, and the image-side surface S9 are numbered from small to large. It is understood that the units of the radius Y, thickness, and focal length in table 11 are mm. The reference wavelength of refractive index and Abbe number of each lens in Table 11 was 587.6nm, and the reference wavelength of effective focal length was 546 nm.

TABLE 11

In the sixth embodiment, table 12 gives the high-order term coefficients that can be used for each aspherical mirror surface in the sixth embodiment, wherein each aspherical mirror surface type can be defined by the formula given in the first embodiment.

TABLE 12

Referring to fig. 12 (a), fig. 12 (a) shows a light spherical aberration curve of the optical lens 100 in the sixth embodiment at wavelengths of 460nm, 510nm, 546nm, 610nm and 656.3 nm. In fig. 2 (a), the abscissa in the X-axis direction represents the focus shift, and the ordinate in the Y-axis direction represents the normalized field of view. As can be seen from (a) in fig. 12, the spherical aberration value of the optical lens 100 in the sixth embodiment is better, which illustrates that the imaging quality of the optical lens 100 in this embodiment is better.

Referring to fig. 12 (B), fig. 12 (B) is a diagram of astigmatism of light of the optical lens 100 in the sixth embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents the focus offset and the ordinate along the Y-axis direction represents the image height in mm. The astigmatism curves represent the meridional image plane curvature T and the sagittal image plane curvature S, and it can be seen from (B) in fig. 12 that astigmatism of the optical lens 100 is well compensated at this wavelength.

Referring to fig. 12 (C), fig. 12 (C) is a distortion curve diagram of the optical lens 100 in the sixth embodiment at a wavelength of 546 nm. Wherein the abscissa along the X-axis direction represents distortion and the ordinate along the Y-axis direction represents image height in mm. As can be seen from (C) in fig. 12, the distortion of the optical lens 100 is well corrected at a wavelength of 546 nm.

Referring to table 13, table 13 summarizes ratios of the relations in the first embodiment to the sixth embodiment of the present application.

Watch 13

Referring to fig. 13, the present application further discloses a camera module 200, where the camera module 200 includes a photo sensor chip 201 and the optical lens 100 according to any of the first to sixth embodiments, and the photo sensor chip 201 is disposed at an image side of the optical lens 100. The optical lens 100 may be configured to receive a light signal of a subject and project the light signal to the light sensing chip 201, and the light sensing chip 201 may be configured to convert the light signal corresponding to the subject into an image signal. And will not be described in detail herein. It can be understood that the camera module 200 having the optical lens 100 has all the technical effects of the optical lens 100, i.e. the optical lens 100 comprises two mirror groups formed by gluing substrates and lenses, so that not only the processing sensitivity of the optical lens 100 can be reduced, but also the miniaturization design of the optical lens 100 can be realized. In addition, the optical lens 100 has a large field angle, so that a wider shooting range is realized, and light and image positions can be accurately captured and identified. Meanwhile, the optical lens 100 further has a larger aperture, so that the light incident amount in unit time can be increased, and the relative illumination of the marginal field of view can be increased, so as to further accurately capture and identify the positions of light and images. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.

Referring to fig. 14, the present application further discloses an electronic device 300, wherein the electronic device 300 includes a housing 301 and the camera module 200 as described above, and the camera module 200 is disposed on the housing 301 to obtain image information. The electronic device 300 may include, but is not limited to, an endoscope, a capsule lens, an industrial endoscope, and the like. It can be understood that the electronic device 300 having the camera module 200 also has all the technical effects of the optical lens 100. That is, the electronic apparatus 300 can make the optical lens 100 less sensitive to processing, and can realize a compact design of the optical lens 100. In addition, the optical lens 100 has a large field angle, thereby realizing a wider shooting range, and being capable of accurately capturing and identifying light and image positions. Meanwhile, the optical lens 100 further has a larger aperture, so that the light incident amount in unit time can be increased, and the relative illumination of the marginal field of view can be increased, so as to further accurately capture and identify the positions of light and images. Since the above technical effects have been described in detail in the embodiments of the optical lens 100, they are not described herein again.

The optical lens, the camera module and the electronic device disclosed by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the optical lens, the camera module and the electronic device and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.