CN207473176U - A kind of optical system and wide-angle lens - Google Patents
A kind of optical system and wide-angle lens Download PDFInfo
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- CN207473176U CN207473176U CN201721375792.6U CN201721375792U CN207473176U CN 207473176 U CN207473176 U CN 207473176U CN 201721375792 U CN201721375792 U CN 201721375792U CN 207473176 U CN207473176 U CN 207473176U
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Abstract
The optical system and wide-angle lens of the utility model include：Along six groups of lens that optical axis arrangement is set gradually by object side to image side, the first lens group and the 5th lens group have negative refractive power, and third lens group, the 4th lens group and the 6th lens group have positive refracting power；First lens group object side optical surface is convex surface；Second lens group object side optical surface is convex surface, and image side optical surface is concave surface；5th lens group image side optical surface is concave surface；F1For the effective focal length of the first lens group, F2For the effective focal length of the second lens group, N5For the refractive index of the 5th lens group, F5For the effective focal length of the 5th lens group, F is the focal length of optical system, meets following relationship：|F1/F2|<0.5, N5>1.6, | F5/F|<2.0.The lens group of the optical system is simple to manufacture, and can meet requirement of the user to the ultra-wide angle high brightness of camera lens, and can meet user to miniaturization of electronic products, it is lightening the needs of.
Description
Technical field
The utility model is related to a kind of optical system more particularly to a kind of optical system and wide-angle lens.
Background technology
The utility model of CCD, CMOS instead of film etc. new picture pick-up device (sensor), realizes the digitlization of photo
Exploitation with miniature movable device and universal.With the development of science and technology the trend of present electronic product development is mainly court
To miniaturization and ultrathin, such as small-sized or slim digital camera, network cameras, mobile phone camera lens etc., high-resolution and
Though demand of the high imaging quality for user, small-sized and slimming wide-angle lens is even more the active demand of user.But at present
Wide-angle lens in the market is not met by small-sized and slimming requirement.
Utility model content
The utility model provides a kind of optical system and wide-angle lens, lens group are simple to manufacture, and can meet user to camera lens
Ultra-wide angle high brightness requirement and to miniaturization of electronic products, lightening demand.
The utility model provides a kind of optical system, including：Six set gradually along optical axis arrangement by object side to image side
Group lens, the first lens group and the 5th lens group have negative refractive power, third lens group, the 4th lens group and the 6th lens group tool
There is positive refracting power；
First lens group object side optical surface is convex surface；Second lens group object side optical surface be convex surface, image side optical surface
For concave surface；5th lens group image side optical surface is concave surface；
Wherein, F1For the effective focal length of the first lens group, F2For the effective focal length of the second lens group, N5For the 5th lens group
Refractive index, F5For the effective focal length of the 5th lens group, F is the focal length of optical system, and meets following relationship：
|F1/F2|<0.5, N5>1.6, | F5/F|<2.0。
In the optical system of the utility model, at least one face is becomes curved in two faces of the 6th lens group
Shape.
In the optical system of the utility model, described at least one face of six groups of lens is aspherical.
The utility model also provides a kind of wide-angle lens, and the optical system of the optical lens includes：Along optical axis arrangement by
Six groups of lens that object side to image side is set gradually, the first lens group and the 5th lens group have negative refractive power, third lens group, the
Four lens groups and the 6th lens group have positive refracting power；
First lens group object side optical surface is convex surface；Second lens group object side optical surface be convex surface, image side optical surface
For concave surface；5th lens group image side optical surface is concave surface；
Wherein, F1For the effective focal length of the first lens group, F2For the effective focal length of the second lens group, N5For the 5th lens group
Refractive index, F5For the effective focal length of the 5th lens group, F is the focal length of optical system, and meets following relationship：
|F1/F2|<0.5, N5>1.6, | F5/F|<2.0。
In the wide-angle lens of the utility model, at least one face is becomes curved in two faces of the 6th lens group
Shape.
In the wide-angle lens of the utility model, described at least one face of six groups of lens is aspherical.
The lens group of optical system provided by the utility model is simple to manufacture, between the first lens group and the 6th lens group
Distance is shorter, can meet requirement of the user to the ultra-wide angle high brightness of camera lens and to miniaturization of electronic products, lightening need
It asks.Eyeglass face type considers the feasibility of injection, has the advantages that mold manufacturing and injection production are simple.Since low distortion is special
Property, it does not need to increase correction.
Description of the drawings
Fig. 1 is the sectional view of the embodiment 1 of the utility model optical system；
Fig. 2 is 1 mesh distortion performance plot of embodiment；
Fig. 3 a are the astigmatism curvature of field line charts of embodiment 1；
Fig. 3 b are the distortion characteristics curve graphs of embodiment 1；
Fig. 4 is the sectional view of the embodiment 2 of the utility model optical system；
Fig. 5 is 2 mesh distortion performance plot of embodiment；
Fig. 6 a are the astigmatism curvature of field line charts of embodiment 2；
Fig. 6 b are the distortion characteristics curve graphs of embodiment 2.
Specific embodiment
The utility model provides a kind of optical system, including：It is set gradually along optical axis arrangement by object side to image side
Six groups of lens, the first lens group 1 and the 5th lens group 5 have negative refractive power, and third lens group 3, the 4th lens group 4 and the 6th are saturating
Microscope group 6 has positive refracting power.
First lens group, 1 object side optical surface is convex surface；Second lens group, 2 object side optical surface is convex surface, and image side optical surface is
Concave surface；3 image side optical surface of third lens group is concave surface；5th lens group, 5 image side optical surface is concave surface.
First lens group 1 and the second lens group 2 meet following relationship：
|F1/F2|<0.5 (1)
Wherein, F1For the effective focal length of the first lens group 1, F2Effective focal length for the second lens group 2.
The critical value meaning of formula (1) is, in wide-angle lens, since the first lens group 1 has very strong negative refractive power,
If beyond the range of above-mentioned formula (1), the incidence angle of remaining lens group incident ray can become larger, also can to camera lens overall performance
It has an impact.
5th lens group 5 meets following relationship：
N5>1.6 (2)
Wherein, N5For the refractive index of the 5th lens group 5, the refractive index that formula (2) limits 5 material of the 5th lens group will reach
More than 1.6.When the refractive index of 5 material of the 5th lens group is below 1.6, it is difficult to shorten from the first lens group 1 lens to the end
The distance of group；It, can be with from the distance of the first lens group 1 lens group to the end when the refractive index of 5th lens group, 5 material is more than 1.6
Shorten.Moreover, if material of the selective refraction rate below 1.6, achromatic are also highly difficult.
|F5/F|<2.0 (3)
Wherein, F5For the effective focal length of the 5th lens group 5, F is the focal length of optical system.Formula (3) limits the 5th lens
The effective focal length of group 5 and the ratio of whole focal length are less than 2.When the effective focal length of the 5th lens group 5 and the ratio of whole focal length are big
When 2, the curvature of the 5th lens group 5 into image side surface can become larger, and distortion aberration and periphery achromatic can be relatively difficult.
Further, any one side in two faces of the 6th lens group 6 of the optical system of the utility model all has
At least two become curved shape.At least one face is aspherical in six groups of lens in the optical system of the utility model.
It is aspherical to parse according to the following formula.
In formula (4), z, which is represented, loses high (SAG), and k represents the constant of the cone, and c represents curvature, and r represents radial distance.A、B、C、
D, E, F, G, H and J are asphericity coefficient.
The utility model additionally provides a kind of wide-angle lens, using above-mentioned optical system, the concrete structure of optical system this
In repeat no more.
The optical system of the utility model is illustrated with reference to embodiment：
Fig. 1 is the sectional view of the embodiment 1 of the utility model optical system, and the optical system of embodiment 1 is FOV 120
Degree, image height and TTL are from the first lens group to the optical design that the ratio of the distance of image planes is 1.3.With optics light hole Fno
2.2 it is characterized.The effective focal length F of first lens group 11For -1.5765mm, the effective focal length F of the second lens group 22For
4.0512mm, the effective focal length F of third lens group 33For 5.2427mm, the effective focal length F of the 4th lens group 44For 1.4202mm,
The effective focal length F of 5th lens group 55For -1.8962mm, the effective focal length F of the 6th lens group 66For 3.6352mm.Table 1 is implements
The relevant parameter of the optical system of example 1.
Table 2 is the asphericity coefficient table of embodiment 1.
Fig. 2 is 1 mesh distortion performance plot of embodiment, it is seen that TV distortion is less than 3.3% in all visual fields of this optical system；Figure
3a is the astigmatism curvature of field line chart of embodiment 1；Fig. 3 b are the distortion characteristics curve graphs of embodiment 1, it is seen that this optical system is all to be regarded
Optical distortion maximum value is 2.7% in.
Fig. 4 is the sectional view of the embodiment 2 of the utility model optical system, and the optical system of embodiment 2 is FOV120 degree,
Image height and TTL are from the first lens group to the optical design that the ratio of the distance of image planes is 1.3.With optics light hole Fno 2.2
It is characterized.The effective focal length F of first lens group 11For -1.5723mm, the effective focal length F of the second lens group 22For 4.1563mm,
The effective focal length F of three lens groups 33For 5.1327mm, the effective focal length F of the 4th lens group 44For 1.4294mm, the 5th lens group 5
Effective focal length F5For -1.9160mm, 6 effective focal length F of the 6th lens group6For 3.8447mm.Table 3 is the optical system of embodiment 2
Relevant parameter.
| Face number | Radius | Thickness | Glass refraction and dispersion (Abbe numbers) | Remarks |
| 1 | -17.59 | 0.82 | 1.535:55.8 | It is aspherical |
| 2 | 0.90 | 0.52 | It is aspherical | |
| 3 | 1.45 | 0.41 | 1.64:23.53 | It is aspherical |
| 4 | 2.87 | 0.35 | It is aspherical | |
| 5 | -2.91 | 0.57 | 1.544:56.11 | It is aspherical |
| 6 | -1.54 | 0.1 | It is aspherical | |
| 7 | Plane | 0.1 | Diaphragm | |
| 8 | 2.34 | 0.64 | 1.544:56.11 | It is aspherical |
| 9 | -1.05 | 0.08 | It is aspherical | |
| 10 | -2.38 | 0.24 | 1.651:21.52 | It is aspherical |
| 11 | 2.73 | 0.54 | It is aspherical | |
| 12 | 1.35 | 0.73 | 1.535:55.8 | It is aspherical |
| 13 | 3.53 | 0.12 | It is aspherical | |
| 14 | Plane | 0.21 | 1.52:64.16 | Optical filter |
| 15 | Plane | 0.56 | It is aspherical |
Table 4 is the asphericity coefficient table of embodiment 2.
Fig. 5 is 2 mesh distortion performance plot of embodiment, it is seen that TV distortion is less than 2.2% in all visual fields of this optical system；Figure
6a is the astigmatism curvature of field line chart of embodiment 2；Fig. 6 b are the distortion characteristics curve graphs of embodiment 2, it is seen that this optical system is all to be regarded
Optical distortion maximum value is 3.6% in.
The feature of two embodiments be all the shape in 5 second face of the 5th lens group be into image side concave surface, refractive index 1.6 with
On.In embodiment 1 | F1/F2| ratio for 0.39, in embodiment 2 | F1/F2| ratio be 0.37；5th lens in embodiment 1
The ratio of 5 effective focal lengths of group and whole focal length | F5/ F | it is 1.54,5 effective focal length of the 5th lens group and whole coke in embodiment 2
Away from ratio | F5/ F | it is 1.51.
The above is only the preferred embodiment of the present invention, the thought being not intended to limit the utility model, it is all
Within the spirit and principles of the utility model, it is new to should be included in this practicality for any modification, equivalent replacement, improvement and so on
Within the protection domain of type.
Claims (6)
1. a kind of optical system, which is characterized in that including：Six groups set gradually by object side to image side along optical axis arrangement are saturating
Mirror, the first lens group and the 5th lens group have negative refractive power, and third lens group, the 4th lens group and the 6th lens group have just
Refracting power；
First lens group object side optical surface is convex surface；Second lens group object side optical surface is convex surface, and image side optical surface is recessed
Face；5th lens group image side optical surface is concave surface；
Wherein, F1For the effective focal length of the first lens group, F2For the effective focal length of the second lens group, N5Folding for the 5th lens group
Penetrate rate, F5For the effective focal length of the 5th lens group, F is the focal length of optical system, and meets following relationship：
|F1/F2|<0.5, N5>1.6, | F5/F|<2.0。
2. optical system as described in claim 1, which is characterized in that at least one in two faces of the 6th lens group
Face is becomes curved shape.
3. optical system as described in claim 1, which is characterized in that described at least one face of six groups of lens is aspherical.
4. a kind of wide-angle lens, which is characterized in that the optical system of the wide-angle lens includes：It is arranged along optical axis by object side to picture
Six groups of lens that side is set gradually, the first lens group and the 5th lens group have negative refractive power, third lens group, the 4th lens group
There is positive refracting power with the 6th lens group；
First lens group object side optical surface is convex surface；Second lens group object side optical surface is convex surface, and image side optical surface is recessed
Face；5th lens group image side optical surface is concave surface；
Wherein, F1For the effective focal length of the first lens group, F2For the effective focal length of the second lens group, N5Folding for the 5th lens group
Penetrate rate, F5For the effective focal length of the 5th lens group, F is the focal length of optical system, and meets following relationship：
|F1/F2|<0.5, N5>1.6, | F5/F|<2.0。
5. wide-angle lens as claimed in claim 4, which is characterized in that at least one in two faces of the 6th lens group
Face is becomes curved shape.
6. wide-angle lens as claimed in claim 4, which is characterized in that described at least one face of six groups of lens is aspherical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375792.6U CN207473176U (en) | 2017-10-24 | 2017-10-24 | A kind of optical system and wide-angle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375792.6U CN207473176U (en) | 2017-10-24 | 2017-10-24 | A kind of optical system and wide-angle lens |
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| Publication Number | Publication Date |
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| CN207473176U true CN207473176U (en) | 2018-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721375792.6U Active CN207473176U (en) | 2017-10-24 | 2017-10-24 | A kind of optical system and wide-angle lens |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664825A (en) * | 2017-10-24 | 2018-02-06 | 辽宁中蓝电子科技有限公司 | A kind of optical system and wide-angle lens |
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2017
- 2017-10-24 CN CN201721375792.6U patent/CN207473176U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664825A (en) * | 2017-10-24 | 2018-02-06 | 辽宁中蓝电子科技有限公司 | A kind of optical system and wide-angle lens |
| CN107664825B (en) * | 2017-10-24 | 2023-12-26 | 辽宁中蓝光电科技有限公司 | Optical system and wide-angle lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201127 Address after: 124000 No. 388 North China Road, Xinglongtai District, Panjin City, Liaoning Province Patentee after: Liaoning Zhonglan Photoelectric Technology Co.,Ltd. Address before: 124010 Zhonghua Road East, Xinglongtai District, Liaoning, Panjin Patentee before: LIAONING ZHONGLAN ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Optical system and wide-angle lens Effective date of registration: 20210726 Granted publication date: 20180608 Pledgee: China Construction Bank Corporation Panjin branch Pledgor: Liaoning Zhonglan Photoelectric Technology Co.,Ltd. Registration number: Y2021210000049 |