CN112198637A - Eight wide-angle camera lenses - Google Patents
Eight wide-angle camera lenses Download PDFInfo
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- CN112198637A CN112198637A CN202011282221.4A CN202011282221A CN112198637A CN 112198637 A CN112198637 A CN 112198637A CN 202011282221 A CN202011282221 A CN 202011282221A CN 112198637 A CN112198637 A CN 112198637A
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- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 230000014509 gene expression Effects 0.000 claims abstract description 14
- 238000003384 imaging method Methods 0.000 claims description 43
- 230000004075 alteration Effects 0.000 description 15
- 230000000694 effects Effects 0.000 description 4
- 201000009310 astigmatism Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
The invention discloses an eight-piece wide-angle camera lens, which comprises 8 pieces of lenses arranged in sequence from an object side to an image side along an optical axis, wherein the first lens has negative refractive power, and the surface of the object side is a concave surface and the surface of the image side is a convex surface; the second lens has negative refractive power; the object side surface of the third lens is a convex surface; the fourth lens has negative refractive power, and the surface of the image side is a concave surface; the seventh lens element has positive refractive power, and both the image-side surface and the object-side surface are convex; the eighth lens element has negative refractive power, and has a concave image-side surface and at least one convex surface; the surfaces of the 8 lenses are aspheric surfaces; the following conditional expressions are satisfied: TTL/MIC is less than 1.6, FOV is less than 100 when 80, and MIC is the maximum half image height of the lens imaged on an image surface; TTL is the total optical height from the object side surface of the first lens to the image plane; the FOV is the field angle corresponding to a 1.0 field of view. The lens has the advantages of wide angle, miniaturization, small distortion and the like.
Description
Technical Field
The invention belongs to the technical field of optical lenses, and relates to an eight-lens wide-angle camera lens.
Background
With the continuous development of mobile phone technology, the camera effect of the mobile phone gradually becomes an important index for evaluating the performance of the mobile phone, the clear image of the mobile phone camera is presented, meanwhile, a new trend that the lens is pursued to shoot more information to be mobile phone camera shooting is achieved, and the wide-angle lens has a larger field angle compared with a conventional lens and can meet the requirement of shooting in a wider range. However, the general wide-angle lens has a problem of excessive distortion, which affects the final imaging effect of the lens.
Disclosure of Invention
In order to solve the technical problems, the invention provides an eight-lens wide-angle pick-up lens which has a good imaging effect and small distortion and can meet the requirement of miniaturization.
The invention discloses an eight-piece wide-angle camera lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object side to an image side along an optical axis, wherein the first lens has negative refractive power, and the surface of the object side is a concave surface and the surface of the image side is a convex surface; the second lens has a negative refractive power; the object side surface of the third lens is a convex surface; the fourth lens has negative refractive power, and the surface of the image side of the fourth lens is a concave surface; the seventh lens has positive refractive power, and both the image side surface and the object side surface are convex surfaces; the eighth lens element has negative refractive power, and has a concave image-side surface and at least one convex surface; the surfaces of the 8 lenses are aspheric surfaces; and satisfies the following conditional expressions:
TTL/MIC<1.6
80<FOV<100
wherein MIC is the maximum half-image height of the lens in image surface imaging; TTL is the total optical height from the object side surface of the first lens to an image plane; the FOV is the field angle corresponding to a 1.0 field of view.
In the eight-piece wide-angle imaging lens of the present invention, the imaging lens further satisfies the following relational expression:
2.0<(R1+R2)/F1<5.5
0<(R3+R4)/F12<4
wherein R1 is a radius of curvature of the object-side surface of the first lens; r2 is the radius of curvature of the image-side surface of the first lens; f1 is the focal length of the first lens; r3 is the radius of curvature of the second lens object-side surface; r4 is the radius of curvature of the second lens object-side surface; f12 is the focal length of the second lens.
In the eight-piece wide-angle imaging lens of the present invention, the imaging lens further satisfies the following relational expression:
0<R5/F3<0.6
where R5 is a radius of curvature of the object-side surface of the third lens, and F3 is a focal length of the third lens.
In the eight-piece wide-angle imaging lens of the present invention, the imaging lens further satisfies the following relational expression:
-2<R8/F4<0
wherein R8 is a radius of curvature of the image-side surface of the fourth lens element, and F4 is a focal length of the fourth lens element.
In the eight-piece wide-angle imaging lens of the present invention, the imaging lens further satisfies the following relational expression:
-1.5<Y82/F8<0
wherein Y82 is the distance from the edge of the image-side surface of the eighth lens element to the optical axis, and F8 is the focal length of the eighth lens element.
In the eight-piece wide-angle imaging lens of the present invention, the imaging lens further satisfies the following relational expression:
Fno<2.0
wherein Fno is the F number of the lens.
In the eight-piece wide-angle imaging lens of the present invention, the fifth lens has positive refractive power or negative refractive power; the sixth lens has a negative refractive power.
According to the eight-piece wide-angle camera lens, the advantages of the wide-angle camera lens are inherited by the camera lens through adjusting the focal power, the surface type, the center thickness of each lens, the axial distance between each lens and the like, the problem of overlarge distortion of the wide-angle camera lens is effectively solved, the camera lens has the advantages of miniaturization, good imaging effect and small distortion of the camera lens, and the wide-angle camera lens has higher competitiveness.
Drawings
Fig. 1 is a schematic structural view of an eight-piece wide-angle imaging lens according to embodiment 1 of the present invention;
fig. 2A is a graph of axial chromatic aberration of the imaging lens of embodiment 1;
fig. 2B is a distortion graph of the imaging lens of embodiment 1;
fig. 3 is a schematic structural view of an eight-piece wide-angle imaging lens according to embodiment 1 of the present invention;
fig. 4A is a graph of axial chromatic aberration of the imaging lens of embodiment 1;
fig. 4B is a distortion graph of the imaging lens of embodiment 1;
fig. 5 is a schematic structural view of an eight-piece wide-angle imaging lens according to embodiment 1 of the present invention;
fig. 6A is a graph of axial chromatic aberration of the imaging lens of embodiment 1;
fig. 6B is a distortion graph of the imaging lens of embodiment 1.
Detailed Description
The invention discloses an eight-piece wide-angle camera lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are sequentially arranged from an object side to an image side along an optical axis, wherein the first lens has negative refractive power, and the surface of the object side is a concave surface and the surface of the image side is a convex surface; the second lens has a negative refractive power; the object side surface of the third lens is a convex surface; the fourth lens has negative refractive power, and the surface of the image side of the fourth lens is a concave surface; the seventh lens has positive refractive power, and both the image side surface and the object side surface are convex surfaces; the eighth lens element has negative refractive power, and has a concave image-side surface and at least one convex surface; the surfaces of the 8 lenses are aspheric surfaces; and satisfies the following conditional expressions:
TTL/MIC<1.6
80<FOV<100
wherein MIC is the maximum half-image height of the lens in image surface imaging; TTL is the total optical height from the object side surface of the first lens to an image plane; the FOV is the field angle corresponding to a 1.0 field of view.
In specific implementation, the camera lens further satisfies the following relational expression:
2.0<(R1+R2)/F1<5.5
0<(R3+R4)/F12<4
wherein R1 is a radius of curvature of the object-side surface of the first lens; r2 is the radius of curvature of the image-side surface of the first lens; f1 is the focal length of the first lens; r3 is the radius of curvature of the second lens object-side surface; r4 is the radius of curvature of the second lens object-side surface; f12 is the focal length of the second lens. The lens meeting the condition has a wider field angle on the premise of smaller volume.
In specific implementation, the camera lens further satisfies the following relational expression:
0<R5/F3<0.6
where R5 is a radius of curvature of the object-side surface of the third lens, and F3 is a focal length of the third lens. After the condition is met, the influence of the axial chromatic aberration of the lens can be optimized, the distortion is reduced, and the imaging quality of the lens is improved.
In specific implementation, the camera lens further satisfies the following relational expression:
-2<R8/F4<0
wherein R8 is a radius of curvature of the image-side surface of the fourth lens element, and F4 is a focal length of the fourth lens element. After the condition is met, the influence of the axial chromatic aberration of the lens can be optimized, the distortion is reduced, and the imaging quality of the lens is improved.
In specific implementation, the camera lens further satisfies the following relational expression:
-1.5<Y82/F8<0
wherein Y82 is the distance from the edge of the image-side surface of the eighth lens element to the optical axis, and F8 is the focal length of the eighth lens element. The chromatic aberration and distortion of the lens can be further improved after the condition is met, and the optical lens can shoot clear and complete images.
In specific implementation, the camera lens further satisfies the following relational expression:
Fno<2.0
wherein Fno is the F number of the lens.
The smaller F number can make the lens have larger near light quantity after meeting the condition, so that the lens can adapt to environments under different illumination.
In specific implementation, the fifth lens has positive refractive power or negative refractive power; the sixth lens has a negative refractive power.
The object side and image side surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are aspheric surfaces, wherein aspheric coefficients satisfy the following equation:
wherein Z is an aspheric sagittal height, c is an aspheric paraxial curvature, y is a lens aperture, k is a conic coefficient, a4 is a 4-th aspheric coefficient, a6 is a 6-th aspheric coefficient, A8 is an 8-th aspheric coefficient, a10 is a 10-th aspheric coefficient, a12 is a 12-th aspheric coefficient, a14 is a 14-th aspheric coefficient, and a16 is a 16-th aspheric coefficient.
Example 1
Fig. 1 is a 2D view of an optical lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical lens of the present embodiment, in order from an object side to an image side along an optical axis, includes: the first lens has a negative refractive power; the second lens has negative refractive power; the third lens has positive refractive power; the fourth lens has negative refractive power; the fifth lens has negative refractive power; the sixth lens has negative refractive power; the seventh lens has positive refractive power; the eighth lens has a negative refractive power; the optical filter has an object side surface and an image side surface, and the diaphragm is arranged between the first lens and the second lens. The incident light passes through each lens surface in sequence and is finally imaged on an imaging surface.
Tables 1(a), 1(b) and 1(c) show the surface type, radius of curvature, thickness and material of each lens of the optical lens of example 1. Wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
The design parameters of the lens assembly of the present embodiment refer to the following table:
TABLE 1(a)
| Lens | Surface number | Surface type | Radius of curvature | Thickness of | Material Property (Nd: Vd) | |
| Article surface | Spherical surface | Inf | Inf | |||
| P1 | S 1 | Aspherical surface | -5.647 | 0.45 | 1.5352：56.115 | |
| S 2 | Aspherical surface | -19.680 | 0.11 | |||
| Stop | Spherical surface | Inf | 0.002 | |||
| P2 | S 3 | Aspherical surface | -28.581 | 0.22 | 1.5352：56.115 | |
| S 4 | Aspherical surface | -28.663 | 0.10 | |||
| P3 | S 5 | Aspherical surface | 1.360 | 0.46 | 1.5352：56.115 | |
| S 6 | Aspherical surface | -10.389 | 0.17 | |||
| | S | 7 | Aspherical surface | -8.762 | 0.22 | 1.6612：20.3540 |
| S 8 | Aspherical surface | 6.479 | 0.21 | |||
| P5 | S 9 | Aspherical surface | 15.601 | 0.22 | 1.5445：55.987 | |
| S 10 | Aspherical surface | 9.924 | 0.11 | |||
| P6 | S 11 | Aspherical surface | 2.434 | 0.22 | 1.6612：20.3540 | |
| S 12 | Aspherical surface | 1.590 | 0.20 | |||
| P7 | S 13 | Aspherical surface | 3.067 | 0.49 | 1.567:38 | |
| S 14 | Aspherical surface | -1.302 | 0.40 | |||
| P8 | S 15 | Aspherical surface | -10.996 | 0.20 | 1.567:38 | |
| S 16 | Aspherical surface | 1.347 | 0.32 | |||
| IR | 17 | Spherical surface | Inf | 0.21 | BK7 | |
| 18 | Spherical surface | Inf | 0.29 | |||
| Image | Spherical surface |
TABLE 1(b)
In this embodiment, the specific lens parameters are shown in the following table:
TABLE 1(c)
According to table 1(a), table 1(b) and fig. 1, the shape of the lens and the attributes of the lens of the current embodiment are clearly shown, which illustrates that the current embodiment realizes miniaturization of the lens and has a characteristic of a larger angle of field by adjusting the shape and the interval of the lens.
As shown clearly in the description of the astigmatism curves in table 1(c) and fig. 2A, after the lens meets the requirements of the claims, the chromatic aberration curve on the axis of the lens is smaller, which indicates that the lens has a better capability of improving the chromatic aberration on the axis, and that the lens can present a clear image when shooting an object.
As shown clearly by the distortion curves in table 1(c) and fig. 2B, the maximum distortion value of the lens is less than 4% after the lens meets the requirements of the claims, which indicates that the lens has a good capability of improving distortion.
According to the information, the embodiment can realize the miniaturization of the lens, reduce the influence of distortion and chromatic aberration and present a clearer image.
Example 2
Fig. 3 is a 2D diagram of an optical lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical lens of the present embodiment, in order from an object side to an image side along an optical axis, includes: the first lens has a negative refractive power; the second lens has negative refractive power; the third lens has positive refractive power; the fourth lens has negative refractive power; the fifth lens has positive refractive power; the sixth lens has negative refractive power; the seventh lens has positive refractive power; the eighth lens has a negative refractive power; the optical filter is provided with an object side surface and an image side surface, and the diaphragm is arranged between the second lens and the third lens. The incident light passes through each lens surface in sequence and is finally imaged on an imaging surface.
Tables 2(a), 2(b), 2(c) show the surface type, radius of curvature, thickness and material of each lens of the optical lens of example 2. Wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
In this embodiment, the specific design parameters refer to the following table:
TABLE 2(a)
TABLE 2(b)
In this embodiment, the specific lens parameters are shown in the following table:
TABLE 2(c)
According to table 2(a), table 2(b) and fig. 3, the lens shape and each attribute of the lens of the current embodiment are clearly shown, which illustrates that the current embodiment realizes miniaturization of the lens and has a characteristic of a larger angle of field of view by adjusting the shape and the interval of the lens.
As shown clearly in the description of the astigmatism curves in table 2(c) and fig. 4A, after the lens meets the requirements of the claims, the chromatic aberration curve on the axis of the lens is smaller, which indicates that the lens has a better capability of improving the chromatic aberration on the axis, and that the lens can present a clear image when shooting an object.
As shown clearly by the distortion curves in table 2(c) and fig. 4B, after the lens meets the requirements of the claims, the maximum distortion value of the lens is less than 4%, which indicates that the lens has a good capability of improving distortion.
According to the information, the embodiment can realize the miniaturization of the lens, reduce the influence of distortion and chromatic aberration and present a clearer image.
Example 3
Fig. 5 is a 2D diagram of an optical lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical lens of the present embodiment, in order from an object side to an image side along an optical axis, includes: the first lens has a negative refractive power; the second lens has negative refractive power; the third lens has positive refractive power; the fourth lens has negative refractive power; the fifth lens has negative refractive power; the sixth lens has negative refractive power; the seventh lens has positive refractive power; the eighth lens has a negative refractive power; the optical filter has an object side surface and an image side surface, and the diaphragm is arranged between the first lens and the second lens. The incident light passes through each lens surface in sequence and is finally imaged on an imaging surface.
Tables 3(a), 3(b), and 3(c) show the surface type, radius of curvature, thickness, and material of each lens of the optical lens of example 3. Wherein the unit of the radius of curvature and the thickness are both millimeters (mm).
In this embodiment, the specific design parameters refer to the following table:
TABLE 3(a)
TABLE 3(b)
In this embodiment, the specific lens parameters are shown in the following table:
table 3(c)
According to table 3(a), table 3(b) and fig. 5, the lens shape and each attribute of the lens of the current embodiment are clearly shown, which illustrates that the current embodiment realizes miniaturization of the lens and has a characteristic of a larger angle of field of view by adjusting the shape and the interval of the lens.
As shown clearly in the description of the astigmatism curves in table 3(c) and fig. 6A, after the lens meets the requirements of the claims, the chromatic aberration curve on the axis of the lens is smaller, which indicates that the lens has a better capability of improving the chromatic aberration on the axis, and that the lens can present a clear image when shooting an object.
As shown clearly by the distortion curves in table 3(c) and fig. 6B, the maximum distortion value of the lens is less than 4% after the lens meets the requirements of the claims, which indicates that the lens has a good capability of improving distortion. According to the information, the embodiment can realize the miniaturization of the lens, reduce the influence of distortion and chromatic aberration and present a clearer image.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined by the appended claims.
Claims (7)
1. An eight-lens wide-angle imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens arranged in this order from an object side to an image side along an optical axis, characterized in that:
the first lens has negative refractive power, and the object-side surface is a concave surface and the image-side surface is a convex surface; the second lens has a negative refractive power; the object side surface of the third lens is a convex surface; the fourth lens has negative refractive power, and the surface of the image side of the fourth lens is a concave surface; the seventh lens has positive refractive power, and both the image side surface and the object side surface are convex surfaces; the eighth lens element has negative refractive power, and has a concave image-side surface and at least one convex surface; the surfaces of the 8 lenses are aspheric surfaces; and satisfies the following conditional expressions:
TTL/MIC<1.6
80<FOV<100
wherein MIC is the maximum half-image height of the lens in image surface imaging; TTL is the total optical height from the object side surface of the first lens to an image plane; the FOV is the field angle corresponding to a 1.0 field of view.
2. The eight-piece wide-angle imaging lens of claim 1, wherein the imaging lens further satisfies the following relationship:
2.0<(R1+R2)/F1<5.5
0<(R3+R4)/F12<4
wherein R1 is a radius of curvature of the object-side surface of the first lens; r2 is the radius of curvature of the image-side surface of the first lens; f1 is the focal length of the first lens; r3 is the radius of curvature of the second lens object-side surface; r4 is the radius of curvature of the second lens object-side surface; f12 is the focal length of the second lens.
3. The eight-piece wide-angle imaging lens of claim 1, wherein the imaging lens further satisfies the following relationship:
0<R5/F3<0.6
where R5 is a radius of curvature of the object-side surface of the third lens, and F3 is a focal length of the third lens.
4. The eight-piece wide-angle imaging lens of claim 1, wherein the imaging lens further satisfies the following relationship:
-2<R8/F4<0
wherein R8 is a radius of curvature of the image-side surface of the fourth lens element, and F4 is a focal length of the fourth lens element.
5. The eight-piece wide-angle imaging lens of claim 1, wherein the imaging lens further satisfies the following relationship:
-1.5<Y82/F8<0
wherein Y82 is the distance from the edge of the image-side surface of the eighth lens element to the optical axis, and F8 is the focal length of the eighth lens element.
6. The eight-piece wide-angle imaging lens of claim 1, wherein the imaging lens further satisfies the following relationship:
Fno<2.0
wherein Fno is the F number of the lens.
7. The eight-piece wide-angle imaging lens of claim 1, wherein the fifth lens has positive refractive power or negative refractive power; the sixth lens has a negative refractive power.
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|---|---|---|---|---|
| CN110174743A (en) * | 2018-02-21 | 2019-08-27 | 株式会社腾龙 | Pick-up lens and the photographic device for having the pick-up lens |
| CN209979916U (en) * | 2019-05-10 | 2020-01-21 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN111830676A (en) * | 2020-07-13 | 2020-10-27 | 南昌欧菲精密光学制品有限公司 | Optical system, image capturing module and electronic device |
| CN111929851A (en) * | 2020-09-29 | 2020-11-13 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
| CN213365167U (en) * | 2020-11-16 | 2021-06-04 | 辽宁中蓝光电科技有限公司 | Eight wide-angle camera lenses |
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2020
- 2020-11-16 CN CN202011282221.4A patent/CN112198637A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174743A (en) * | 2018-02-21 | 2019-08-27 | 株式会社腾龙 | Pick-up lens and the photographic device for having the pick-up lens |
| CN209979916U (en) * | 2019-05-10 | 2020-01-21 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN111830676A (en) * | 2020-07-13 | 2020-10-27 | 南昌欧菲精密光学制品有限公司 | Optical system, image capturing module and electronic device |
| CN111929851A (en) * | 2020-09-29 | 2020-11-13 | 瑞泰光学(常州)有限公司 | Image pickup optical lens |
| CN213365167U (en) * | 2020-11-16 | 2021-06-04 | 辽宁中蓝光电科技有限公司 | Eight wide-angle camera lenses |
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