CN207924236U - A kind of low distortion camera lens of high-resolution - Google Patents
A kind of low distortion camera lens of high-resolution Download PDFInfo
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- CN207924236U CN207924236U CN201820047862.3U CN201820047862U CN207924236U CN 207924236 U CN207924236 U CN 207924236U CN 201820047862 U CN201820047862 U CN 201820047862U CN 207924236 U CN207924236 U CN 207924236U
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Abstract
The utility model discloses a kind of low distortion camera lenses of high-resolution, include successively the first lens group, iris diaphgram and the second lens group along light incident direction, first lens group and the second lens group all have positive light coke, and can be moved along optical axis；First lens group includes a negative lens set and a positive lens set, and first lens group and the second lens group meet following relationship：3<f1/f2<5；‑0.3<f11/f1<‑0.1；Wherein, f1 represents the focal length value of the first lens group, and f2 represents the focal length value of the second lens group, and f11 represents the focal length value of the negative lens set of the first lens group.Short focus, big clear aperature may be implemented in the low distortion camera lens of this high-resolution, and small, and low distortion may be implemented, and imaging effect is good, can be widely applied in optical lens industry.
Description
Technical field
The utility model is related to optical device fields, more particularly to a kind of low distortion camera lens of high-resolution.
Background technology
With the development of field of machine vision, short focus wide-angle lens gradually develops into the master applied to field of machine vision
Equipment, occupation rate of market is wanted to step up every year.Requirement of the field of machine vision to short focus wide-angle lens is mainly volume
Small, low distortion, full filed are clear.But most short focus industrial lens currently on the market, it is small that there are clear apertures, and distortion is larger,
The shortcomings of resolution ratio of peripheral field is inadequate can not meet the demand of Vehicles Collected from Market.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of low distortion camera lens of high-resolution.
Technical solution adopted by the utility model to solve its technical problems is：
A kind of low distortion camera lens of high-resolution, include successively along light incident direction the first lens group, iris diaphgram and
Second lens group, first lens group and the second lens group all have positive light coke, and can be moved along optical axis；
First lens group includes a negative lens set and a positive lens set, and first lens group and the second lens group
Meet following relationship：
3<f1/f2<5；-0.3<f11/f1<-0.1；
Wherein, f1 represents the focal length value of the first lens group, and f2 represents the focal length value of the second lens group, and f11 represents first thoroughly
The focal length value of the negative lens set of microscope group.
Further, it includes a negative and positive balsaming lens that the negative lens set, which includes at least two panels negative lens, the positive lens set,.
Further, in the negative and positive balsaming lens of the positive lens set, the refractive index of at least a piece of lens is more than 2.0.
Further, in first lens group, at least the refractive index of three pieces lens is more than 1.8.
Further, the negative lens set includes the first lens, the second lens and the third lens, and the positive lens set includes the
Four lens, the 5th lens and the 6th lens；
First lens are the selenodont lens with positive light coke, and refractive index is more than 1.8, and Abbe number is less than 24；
Second lens are the selenodont lens with negative power, and refractive index is more than 1.8, and Abbe number is more than 50；
The third lens are the selenodont lens with negative power, and refractive index is less than 1.7, and Abbe number is less than 27；
4th lens are the double concave type lens with negative power, and refractive index is more than 2.0, and Abbe number is less than 23；
5th lens are the lenticular lens with positive light coke, and refractive index is less than 1.8, and Abbe number is more than 40；
6th lens are the lenticular lens with positive light coke, and refractive index is more than 2.0, and Abbe number is less than 24；
4th lens and the 5th lens constitute the balsaming lens with negative power.
Further, second lens group includes the negative lens and a negative and positive balsaming lens of a selenodont.
Further, the low distortion camera lens of the high-resolution meets following relationship：
1<BFL/F<2
Wherein, F indicates that the focal length of the low distortion camera lens of high-resolution, BFL indicate the back focal length of the low distortion camera lens of high-resolution.
Further, between first minute surface and the last one minute surface of second lens group of first lens group
Total length is not more than 39mm, and the aperture of the low camera lens that distorts of the high-resolution is not more than 23mm.
Further, the refractive index of at least a piece of lens is more than 2.0 in the negative and positive balsaming lens of second lens group.
Further, second lens group includes the 7th lens, the 8th lens, the 9th lens and the tenth lens；
7th lens are the meniscus lens with negative power, and refractive index is less than 1.8, and Abbe number is less than 40；
8th lens are the lenticular lens with positive light coke, and refractive index is less than 1.7, and Abbe number is less than 38；
9th lens are the meniscus lens with negative power, and refractive index is more than 2.0, and Abbe number is less than 30；
Tenth lens are the lenticular lens with positive light coke, and refractive index is more than 1.8, and Abbe number is more than 40；
8th lens and the 9th lens constitute the balsaming lens with positive light coke.
The utility model has the beneficial effects that：A kind of low distortion camera lens of high-resolution includes successively along light incident direction
First lens group, iris diaphgram and the second lens group, first lens group and the second lens group all have positive light coke, and
It can be moved along optical axis；First lens group includes a negative lens set and a positive lens set, and first lens group and the
Two lens groups meet following relationship：3<f1/f2<5；-0.3<f11/f1<-0.1；Wherein, f1 represents the focal length of the first lens group
Value, f2 represent the focal length value of the second lens group, and f11 represents the focal length value of the negative lens set of the first lens group.This high-resolution is low
Short focus, big clear aperature may be implemented in distortion camera lens, and small, low distortion may be implemented, imaging effect is good.
Description of the drawings
Fig. 1 is the structural schematic diagram of the low distortion camera lens of the high-resolution of the utility model；
Fig. 2 is that the lateral shaft colouring differential in the utility model specific embodiment is intended to；
Fig. 3 is the chromatic longitudiinal aberration schematic diagram in the utility model specific embodiment；
Fig. 4 is the curvature of field schematic diagram in the utility model specific embodiment；
Fig. 5 is the distortion schematic diagram in the utility model specific embodiment；
Fig. 6 is the ray aberration curve synoptic diagram in the utility model specific embodiment；
Fig. 7 is the disc of confusion schematic diagram in the utility model specific embodiment.
Specific implementation mode
Referring to Fig.1, the utility model provides a kind of low distortion camera lens of high-resolution, includes successively along light incident direction
First lens group G1, iris diaphgram 100 and the second lens group G2, the first lens group G1 and the second lens group G2 all have
Positive light coke, and can be moved along optical axis；
The first lens group G1 include the negative positive lens set G12 of lens set G11 and one, and the first lens group G1 and
Second lens group G2 meets following relationship：
3<f1/f2<5；-0.3<f11/f1<-0.1；
Wherein, f1 represents the focal length value of the first lens group G1, and f2 represents the focal length value of the second lens group G2, and f11 represents
The focal length value of the negative lens set G11 of one lens group G1.
Pass through relational expression " 3<f1/f2<After 5 " limit, it is ensured that this camera lens has longer back work distance from passing through pass
It is formula " -0.3<f11/f1<- 0.1 " after limiting, it is ensured that the field of view angle that this camera lens can undertake is meeting this relational expression
Under structure, the difference of full filed can be corrected, to ensure low distortion.The low distortion camera lens of this high-resolution may be implemented short
Focal length, big clear aperature, and it is small, low distortion may be implemented, imaging effect is good.
It is further used as preferred embodiment, the negative lens set G11 includes at least two panels negative lens, the positive eyeglass
Group G12 includes a negative and positive balsaming lens.
It is further used as preferred embodiment, in the negative and positive balsaming lens of the positive lens set G12, at least a piece of lens
Refractive index be more than 2.0.
It is further used as preferred embodiment, in the first lens group G1, the refractive index of at least three pieces lens is more than
1.8.At least the refractive index of three pieces lens is more than 1.8, it is ensured that the cramped construction of this camera lens.
It is further used as preferred embodiment, the second lens group G2 includes the negative lens and a negative and positive of a selenodont
Balsaming lens.
Include a negative and positive balsaming lens by limiting the first lens group G1 and the second lens group G2, correction aberration can be met
Requirement so that low distortion, high imaging quality may be implemented in this camera lens.
It is further used as preferred embodiment, the low distortion camera lens of the high-resolution meets following relationship：
1<BFL/F<2
Wherein, F indicates that the focal length of the low distortion camera lens of high-resolution, BFL indicate the back focal length of the low distortion camera lens of high-resolution,
I.e. high-resolution it is low distortion camera lens back work distance from.
Pass through relational expression " 1<BFL/F<After 2 " limit so that this camera lens is anti-long distance light channel structure, it is ensured that enough
Back work distance from.
It is further used as preferred embodiment, first minute surface of the first lens group G1 and second lens group
Total length between the last one minute surface of G2 is not more than 39mm, and the low aperture for distorting camera lens of the high-resolution is not more than
23mm。
It is further used as preferred embodiment, at least a piece of lens in the negative and positive balsaming lens of the second lens group G2
Refractive index be more than 2.0.
Referring to Fig.1, a concrete structure of the first lens group G1 and the second lens group G2 are as follows：The negative lens set G11 packets
It includes the 4th lens L4, the 5th lens L5 to include the first lens L1, the second lens L2 and the third lens L3, the positive lens set G12
With the 6th lens L6；
The second lens group G2 includes the 7th lens L7, the 8th lens L8, the 9th lens L9 and the tenth lens L10；
The first lens L1 is the selenodont lens with positive light coke, and refractive index is more than 1.8, and Abbe number is less than
24；And meet 4<F1/F<6, wherein F1 indicates that the focal length of the first lens L1, F indicate that the high-resolution that the utility model is constituted is low
The focal length of distortion camera lens；
The second lens L2 is the selenodont lens with negative power, and refractive index is more than 1.8, and Abbe number is more than
50；And meet -3<F2/F<- 2, wherein F2 indicates the focal length of the second lens L2；
The third lens L3 is the selenodont lens with negative power, and refractive index is less than 1.7, and Abbe number is less than
27；And meet -2.5<F3/F<- 1.5, wherein F3 indicates the focal length of the third lens L3；
The 4th lens L4 is the double concave type lens with negative power, and refractive index is more than 2.0, and Abbe number is less than
23；And meet -1<F4/F<- 0.5, wherein F4 indicates the focal length of the 4th lens L4；
The 5th lens L5 is the lenticular lens with positive light coke, and refractive index is less than 1.8, and Abbe number is more than
40；And meet 1<F5/F<2.5, wherein F5 indicates the focal length of the 5th lens L5；
The 4th lens L4 and the 5th lens L5 constitute the balsaming lens with negative power.
The 6th lens L6 is the lenticular lens with positive light coke, and refractive index is more than 2.0, and Abbe number is less than
24；And meet 1.8<F6/F<2.5, wherein F6 indicates the focal length of the 6th lens L6；
The 7th lens L7 is the meniscus lens with negative power, and refractive index is less than 1.8, and Abbe number is less than
40；And meet 5<F7/F<6.5, wherein F7 indicates the focal length of the 7th lens L7；
The 8th lens L8 is the lenticular lens with positive light coke, and refractive index is less than 1.7, and Abbe number is less than
38；And meet 1<F8/F<2, wherein F8 indicates the focal length of the 8th lens L8；
The 9th lens L9 is the meniscus lens with negative power, and refractive index is more than 2.0, and Abbe number is less than
30；And meet -2<F9/F<- 1, wherein F9 indicates the focal length of the 9th lens L9；
The 8th lens L8 and the 9th lens L9 constitute the balsaming lens with positive light coke；
The tenth lens L10 is the lenticular lens with positive light coke, and refractive index is more than 1.8, and Abbe number is more than
40；And meet 1.5<F10/F<2.5, wherein F10 indicates the focal length of the tenth lens L10.
In this structure, the first lens L1 and the second lens L2 are bent larger selenodont lens using two panels, on the one hand may be used
To realize big field angle, distortion on the other hand can be effectively corrected.And the first lens group G1 uses multi-disc high refractive index in 1.8
High refractive index lens, the incident ray of wide-angle can be effectively transferred so that the light of wide-angle enters this high-resolution
When the iris diaphgram 100 of low distortion camera lens, maximum deviation angle is less than 25 °, while can effectively shorten total length of light path and reduction
Number of lenses.
First lens of second lens group G2, i.e. the 7th lens L7 are the lens of selenodont, and energy active balance first is saturating
The coma and astigmatism of microscope group G1 and the second lens group G2 so that the fit tolerance of the first lens group G1 and the second lens group G2 are sensitive
Degree substantially reduces.
In this structure, along light incident direction, i.e., along the left side in Fig. 1 to the right, the direction is also this high-resolution
The object space of the low distortion camera lens of rate is to the direction of image space.Along the left side in Fig. 1 to the right, the two sides of the first lens L1 is respectively S1
And the two sides of S2, the second lens L2 are respectively S3 and S4, and the two sides of the third lens L3 is respectively S5 and S6, and the two of the 4th lens L4
Face is respectively S7 and S8, and the two sides of the 5th lens L5 is respectively S8 and S9, and the two sides of the 6th lens L6 is respectively S10 and S11, the
The two sides of seven lens L7 is respectively S13 and S14, and the two sides of the 8th lens L8 is respectively S15 and S16, the two sides of the 9th lens L9
The two sides of respectively S16 and S17, the tenth lens L10 are respectively S18 and S19.In addition, in Fig. 1, reference numeral 200 indicates picture
Face.Here, the 4th lens L4 and the 5th lens L5 form balsaming lens, and therefore, the faces S8 are coplanar, likewise, the 8th lens L8 and
9th lens L9 forms balsaming lens, and the faces S16 are coplanar.
Then in this concrete structure, the radius of curvature value range and optimal value in each face of each lens are as shown in table 1 below：
Table 1
From upper table 2, the radius of curvature in each face of this camera lens can be obtained, such as the radius of curvature in the faces S1 is 22.38
~24.74mm, optimal value 23.56mm；The radius of curvature in the faces S2 is 50.59~55.91mm, optimal value 53.25mm；The faces S3
Radius of curvature be 50.59~55.91mm, optimal value 53.25mm.
In addition, the value range and optimal value in gap are as shown in table 2 below between the thickness of each lens, lens：
Table 2
Wherein, △ (L1-L2) refers to the gap between the first lens L1 and the second lens L2, in particular to the first lens L1
Distance of adjacent two curved surface on optical axis, i.e. the distance between S2 and S3 with the second lens L2's.△(L2-L3)、△(L3-
L4) ... △ (L9-L10) etc. is also identical.In addition, △ (L6-100) refers to the curved surface S11 and iris diaphgram on the right of the 6th lens L6
100 distance on optical axis, △ (100-L7) refer to the curved surface S13 on iris diaphgram 100 and the 7th left sides lens L7 on optical axis
Distance.△ (L10-200) refers to curved surface S19 on the right of the tenth lens L10 at a distance from image planes 200 are on optical axis.From upper table 2
In, the gap between the thickness and each lens of each lens of this camera lens can be obtained, such as can be known from table 2
The thickness of one lens L1 is 3.23mm~3.57mm, optimal value 3.4mm.
Additionally, it is preferred that, in this camera lens, the refractive index of the first lens L1 is 1.86, abbe number 22.5；Second lens
The refractive index of L2 is 1.82, abbe number 56；The refractive index of the third lens L3 is 1.59, abbe number 25.5；4th thoroughly
The refractive index of mirror L4 is 2.08, abbe number 19.5；The refractive index of 5th lens L5 is 1.75, abbe number 42.5；The
The refractive index of six lens L6 is 2.08, abbe number 22.8；The refractive index of 7th lens L7 is 1.62, and abbe number is
37.5；The refractive index of 8th lens L8 is 1.66, abbe number 36.3；The refractive index of 9th lens L9 is 2.02, dispersion system
Number is 28.5；The refractive index of tenth lens L10 is 1.83, abbe number 42.3.
The corresponding lateral shaft colouring differential intention of this concrete structure is as shown in Fig. 2, abscissa indicates that aberration is big on axis in Fig. 2
Small, unit mm, ordinate indicates entrance pupil coordinate.The corresponding chromatic longitudiinal aberration schematic diagram of this concrete structure is as shown in figure 3, in Fig. 3
Abscissa indicates that the size of vertical aberration, unit um, ordinate indicate image height.The corresponding curvature of field schematic diagram of this concrete structure is such as
Shown in Fig. 4, abscissa indicates that curvature of field size, unit mm, ordinate indicate image height in Fig. 4.The corresponding distortion of this concrete structure
For schematic diagram as shown in figure 5, abscissa indicates that distortion size, unit are percentage in Fig. 5, ordinate indicates image height.This specific knot
Structure is in the corresponding ray aberration curve synoptic diagram of different image height situations as shown in fig. 6, wherein abscissa indicates normalized entrance pupil
Coordinate, ordinate indicate aberration size, 6 groups of ray aberration curve graph combinations are shared in Fig. 6, wherein in every group of combination, left figure is
Meridian aberration, right figure are sagitta of arc aberration, and IMA indicates different image height values in figure.This concrete structure is corresponding in different image height situations
Disc of confusion schematic diagram is as shown in fig. 7, wherein abscissa and ordinate all indicates disc of confusion size, unit um, and IMA is indicated in figure
Different image height values.
It is good that according to fig. 2~Fig. 7 can be seen that this lens construction aberration correction, and distortion is small, may be implemented preferably to be imaged
Effect.
It is to be illustrated to the preferable implementation of the utility model, but the utility model creation is not limited to institute above
Embodiment is stated, those skilled in the art can also make various be equal without departing from the spirit of the present invention
Deformation is replaced, these equivalent modifications or replacement are all contained in the application claim limited range.
Claims (10)
1. a kind of low distortion camera lens of high-resolution, which is characterized in that include the first lens group successively along light incident direction, variable
Diaphragm and the second lens group, first lens group and the second lens group all have positive light coke, and can be moved along optical axis；
First lens group includes a negative lens set and a positive lens set, and first lens group and the second lens group meet
Following relationship：
3<f1/f2<5；-0.3<f11/f1<-0.1；
Wherein, f1 represents the focal length value of the first lens group, and f2 represents the focal length value of the second lens group, and f11 represents the first lens group
Negative lens set focal length value.
2. a kind of low distortion camera lens of high-resolution according to claim 1, which is characterized in that the negative lens set includes extremely
Few two panels negative lens, the positive lens set include a negative and positive balsaming lens.
3. a kind of low distortion camera lens of high-resolution according to claim 2, which is characterized in that the negative and positive of the positive lens set
In balsaming lens, the refractive index of at least a piece of lens is more than 2.0.
4. a kind of low distortion camera lens of high-resolution according to claim 2, which is characterized in that in first lens group,
At least the refractive index of three pieces lens is more than 1.8.
5. a kind of low distortion camera lens of high-resolution according to claim 2, which is characterized in that the negative lens set includes the
One lens, the second lens and the third lens, the positive lens set include the 4th lens, the 5th lens and the 6th lens；
First lens are the selenodont lens with positive light coke, and refractive index is more than 1.8, and Abbe number is less than 24；
Second lens are the selenodont lens with negative power, and refractive index is more than 1.8, and Abbe number is more than 50；
The third lens are the selenodont lens with negative power, and refractive index is less than 1.7, and Abbe number is less than 27；
4th lens are the double concave type lens with negative power, and refractive index is more than 2.0, and Abbe number is less than 23；
5th lens are the lenticular lens with positive light coke, and refractive index is less than 1.8, and Abbe number is more than 40；
6th lens are the lenticular lens with positive light coke, and refractive index is more than 2.0, and Abbe number is less than 24；
4th lens and the 5th lens constitute the balsaming lens with negative power.
6. a kind of low distortion camera lens of high-resolution according to claim 1, which is characterized in that second lens group includes
The negative lens of one selenodont and a negative and positive balsaming lens.
7. a kind of low distortion camera lens of high-resolution according to claim 1, which is characterized in that the low distortion of the high-resolution
Camera lens meets following relationship：
1<BFL/F<2
Wherein, F indicates that the focal length of the low distortion camera lens of high-resolution, BFL indicate the back focal length of the low distortion camera lens of high-resolution.
8. a kind of low distortion camera lens of high-resolution according to claim 1, which is characterized in that the of first lens group
Total length between one minute surface and the last one minute surface of second lens group is not more than 39mm, and the high-resolution is low abnormal
The aperture for becoming camera lens is not more than 23mm.
9. a kind of low distortion camera lens of high-resolution according to claim 6, which is characterized in that second lens group it is negative
The refractive index of at least a piece of lens is more than 2.0 in positive balsaming lens.
10. a kind of low distortion camera lens of high-resolution according to claim 6, which is characterized in that the second lens group packet
Include the 7th lens, the 8th lens, the 9th lens and the tenth lens；
7th lens are the meniscus lens with negative power, and refractive index is less than 1.8, and Abbe number is less than 40；
8th lens are the lenticular lens with positive light coke, and refractive index is less than 1.7, and Abbe number is less than 38；
9th lens are the meniscus lens with negative power, and refractive index is more than 2.0, and Abbe number is less than 30；
Tenth lens are the lenticular lens with positive light coke, and refractive index is more than 1.8, and Abbe number is more than 40；
8th lens and the 9th lens constitute the balsaming lens with positive light coke.
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| CN201820047862.3U CN207924236U (en) | 2018-01-10 | 2018-01-10 | A kind of low distortion camera lens of high-resolution |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318994A (en) * | 2018-01-10 | 2018-07-24 | 佛山华国光学器材有限公司 | A kind of low distortion camera lens |
| CN109884779A (en) * | 2019-03-15 | 2019-06-14 | 广东奥普特科技股份有限公司 | A kind of low distortion camera lens |
| CN110018554A (en) * | 2019-03-15 | 2019-07-16 | 广东奥普特科技股份有限公司 | A kind of wide-angle machine visual lens |
| CN113960752A (en) * | 2021-10-13 | 2022-01-21 | 江西凤凰光学科技有限公司 | Small-distortion high-resolution fisheye lens |
-
2018
- 2018-01-10 CN CN201820047862.3U patent/CN207924236U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318994A (en) * | 2018-01-10 | 2018-07-24 | 佛山华国光学器材有限公司 | A kind of low distortion camera lens |
| CN108318994B (en) * | 2018-01-10 | 2020-09-08 | 佛山华国光学器材有限公司 | Low-distortion lens |
| CN109884779A (en) * | 2019-03-15 | 2019-06-14 | 广东奥普特科技股份有限公司 | A kind of low distortion camera lens |
| CN110018554A (en) * | 2019-03-15 | 2019-07-16 | 广东奥普特科技股份有限公司 | A kind of wide-angle machine visual lens |
| CN109884779B (en) * | 2019-03-15 | 2023-10-27 | 广东奥普特科技股份有限公司 | Low-distortion lens |
| CN110018554B (en) * | 2019-03-15 | 2024-03-26 | 广东奥普特科技股份有限公司 | Wide-angle machine vision lens |
| CN113960752A (en) * | 2021-10-13 | 2022-01-21 | 江西凤凰光学科技有限公司 | Small-distortion high-resolution fisheye lens |
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