CN208689243U - Without the high-resolution tight shot of thermalization - Google Patents
Without the high-resolution tight shot of thermalization Download PDFInfo
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- CN208689243U CN208689243U CN201820874191.8U CN201820874191U CN208689243U CN 208689243 U CN208689243 U CN 208689243U CN 201820874191 U CN201820874191 U CN 201820874191U CN 208689243 U CN208689243 U CN 208689243U
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Abstract
A kind of high-resolution tight shot of no thermalization successively includes: pre-group eyeglass, diaphragm, rear group's eyeglass and imaging surface with positive light coke with negative power from the object side to image side；The pre-group eyeglass successively includes the first lens group, the second lens with negative power and the third lens with positive light coke；Rear group's eyeglass successively includes the 4th lens with positive light coke, the 5th lens, the 6th lens with negative power and the 7th lens with positive light coke with positive light coke.The utility model devises a kind of miniaturization, high image quality, without the tight shot of thermalization by the way of spherical surface and aspherical reasonable combination, it is not only simple in structure, it is low in cost, and the low defect of existing simple structure eyeglass image quality is overcome, distortion and color difference has been well controllled in full filed.
Description
Technical field
The utility model relates to a kind of technology of optical imaging field, specifically a kind of focal length is 5.8~6.2mm's
Without the high-resolution tight shot of thermalization.
Background technique
Requirement with people to picture catching and record is higher and higher, and the occasion used is more and more extensive, originally
Some structure is complicated, and bulky tight shot can no longer meet demand, and simple small size tight shot often as
Element is too low, can not work normally in thermal extremes or low temperature environment, can not adapt to various use environments, it is even more impossible to meet people
Pursuit to image quality.While pursuit use scope is wide, and camera lens is needed to meet the need for exhibition of high image quality, small size, opened
Issue the problem that such novel tight shot has become highly desirable solution in industry.
Utility model content
The utility model In view of the above shortcomings of the prior art, proposes a kind of high-resolution fixed-focus mirror of no thermalization
Head can be realized miniaturization, high image quality, without thermalization and small distortion.
The utility model is achieved through the following technical solutions:
The utility model successively includes: pre-group eyeglass with negative power, diaphragm, has positive light focus from the object side to image side
The rear group's eyeglass and imaging surface of degree.
The pre-group eyeglass successively include the first lens group, the second lens with negative power and have positive light coke
The third lens；Rear group's eyeglass successively include the 4th lens with positive light coke, the with positive light coke the 5th thoroughly
Mirror, the 6th lens with negative power and the 7th lens with positive light coke.
At least contain six pieces of spheric glasses and one piece of aspherical lens in seven pieces of lens.
Optical filtering and protection glass are successively arranged between rear group's eyeglass and imaging surface.
The ratio of the focal length of the focal length of the pre-group eyeglass and rear group's eyeglass is (- 2.5, -1.5).
The ratio of the whole focal length of the focal length and camera lens of the pre-group eyeglass is (- 4, -2).
The ratio of the whole focal length of the focal length and camera lens of rear group's eyeglass is (1.2,1.5).
The ratio of the whole focal length of the focal length and camera lens of first lens group is (- 4, -2).
The ratio of the whole focal length of the focal length and camera lens of second lens is (- 1.5, -0.5).
The ratio of the whole focal length of the focal length and camera lens of the third lens is (0.8,1.8).
The ratio of the whole focal length of the focal length and camera lens of 4th lens is (1,3).
The ratio of the whole focal length of the focal length and camera lens of 5th lens is (2,4).
The ratio of the whole focal length of the focal length and camera lens of 6th lens is (- 1.5, -0.5).
The ratio of the whole focal length of the focal length and camera lens of 7th lens is (1.5,5).
The refractive index of the rear lens of first lens group is (1.4,1.5)；The refractive index of the third lens is
(1.85,1.95)。
The optic back focal of the camera lens away from the whole focal length ratio of camera lens be (1,2).
The ratio of the aspherical center thickness and edge thickness of 7th lens is (0.5,1.5), with guarantee property
It can stablize.
The ratio of the whole focal length of the aspherical focal length and camera lens of 7th lens is (4,6).
The light of the outermost visual field of the camera lens and the incidence angle of image planes are less than 10 degree, to guarantee the light of surrounding visual field
Than.
The diaphragm is individually set up or using the second surface of the third lens as diaphragm, to save cost.
Technical effect
Compared with prior art, the utility model is devised a kind of small-sized by the way of spherical surface and aspherical reasonable combination
Change, high image quality, the tight shot without thermalization, are not only simple in structure, low in cost, and overcome existing simple structure eyeglass picture
Distortion and color difference has been well controllled in full filed in the low defect of matter.
Detailed description of the invention
Fig. 1 is the semi-cutaway of embodiment 1；
Fig. 2 is aberration diagram on the axis of embodiment 1；
Fig. 3 is the magnification chromatic aberration diagram of embodiment 1；
Fig. 4 is the semi-cutaway of embodiment 2；
Fig. 5 is aberration diagram on the axis of embodiment 2；
Fig. 6 is the magnification chromatic aberration diagram of embodiment 2；
Fig. 7 is the semi-cutaway of embodiment 3；
Fig. 8 is aberration diagram on the axis of embodiment 3；
Fig. 9 is the magnification chromatic aberration diagram of embodiment 3；
In figure: pre-group eyeglass G1, diaphragm STP, rear group's eyeglass G2, imaging surface IMG, optical filtering IRCF, the first lens group L1,
Second lens L2, the third lens L3, the 4th lens L4, the 5th lens L5, the 6th lens L6, the 7th lens L7, protection glass CG,
First front lens L51, the first rear lens L52, the second front lens L11, the second rear lens L12.
Specific embodiment
Embodiment 1
As shown in Figure 1, the present embodiment successively includes: pre-group eyeglass G1, diaphragm with negative power from the object side to image side
STP, rear group's eyeglass G2 and imaging surface IMG with positive light coke.
The pre-group eyeglass G1 successively includes: the first lens group L1, the second lens L2 with negative power and has
The third lens L3 of positive light coke.
The first lens group L1 is the first lens with negative power.
Rear group's eyeglass G2 successively includes: the 4th lens L4 with positive light coke, the with positive light coke the 5th
Lens L5, the 6th lens L6 with negative power and the 7th lens L7 with positive light coke.
First lens group L1, the second lens L2 and the 6th lens L6 is concavees lens；The third to the 5th thoroughly
Mirror L3~L5 and the 7th lens L7 is convex lens.
Hereinafter, showing the various numeric datas about the present embodiment.
Focal length F=6.1mm；Relative aperture FNO=2.2mm；FOV=67.5 ° of field angle.
1 the present embodiment lens construction parameter of table
| Surface serial number | Surface type | Radius of curvature | Thickness | Refractive index | Abbe number |
| 1 | Spherical surface | 12.78 | 0.70 | 1.77 | 38 |
| 2 | Spherical surface | 3.88 | 2.26 | ||
| 3 | Spherical surface | -4.79 | 3.03 | 1.49 | 81 |
| 4 | Spherical surface | -7.17 | 0.10 | ||
| 5 | Spherical surface | 16.37 | 1.41 | 1.65 | 50 |
| 6 | Spherical surface | -16.37 | 0.82 | ||
| Diaphragm | Spherical surface | Infinitely | 3.81 | ||
| 8 | Spherical surface | 30.73 | 1.13 | 1.83 | 37 |
| 9 | Spherical surface | -14.05 | 0.10 | ||
| 10 | Spherical surface | 5.86 | 2.85 | 1.49 | 81 |
| 11 | Spherical surface | -8.00 | 0.73 | 1.84 | 23 |
| 12 | Spherical surface | 4.51 | 2.70 | ||
| 13 | It is aspherical | 12.97 | 2.36 | 1.83 | 37 |
| 14 | It is aspherical | -14.27 | 2.00 | ||
| 15 | Spherical surface | Infinitely | 0.30 | 1.51 | 64 |
| 16 | Spherical surface | Infinitely | 0.10 | ||
| 17 | Spherical surface | Infinitely | 0.50 | 1.51 | 64 |
| 18 | Spherical surface | Infinitely | 0.09 | ||
| Image planes |
The 5th lens L5 and the 6th lens L6 in the present embodiment is glued together, and the second surface of the 5th lens L5 is the
The first surface of six lens L6.
The 7th lens L7 is non-spherical lens in the present embodiment, wherein non-spherical lens coefficient are as follows:
Z is the sag value of lens, and c is the inverse of radius of curvature, and h is height of the lens side to optical axis, and k is circular cone coefficient, A,
B, C, D and E respectively represent order aspherical coefficients.
Table 2 is the present embodiment camera lens asphericity coefficient
| Surface serial number | K | A4 | B6 | C8 | D10 |
| 13 | -7.489113359 | -0.000927254 | -9.02E-05 | 2.96E-06 | -2.98E-08 |
| 14 | -5.63113955 | -2.61E-04 | -8.95E-05 | 2.66E-06 | 1.66E-08 |
As shown in Fig. 2, for aberration diagram on the axis of the present embodiment, including axial chromatic aberration, the curvature of field and distortion.It is aobvious according to image
Show, the axial chromatic aberration of the present embodiment redgreenblue has all obtained good correction in full filed, can blur-free imaging, ensure that height
The demand of image quality.It is shown according to field curve, within the scope of full filed, T line and S line have preferable convergence, the curvature of field and astigmatism
It is very outstanding, guarantee that entire picture imaging is uniform.It is shown according to distortion curve, distortion curve is integrally controlled in minimum range
Interior and periphery distortion curve increases the value for smoothly effectively controlling TV distortion.
As shown in figure 3, being light chromaticity difference diagram, shown according to image, the present embodiment to the ratio chromatism, of redgreenblue and
Coma has carried out preferable amendment, makes that the phenomenon that picture does not have apparent purple boundary, red side or fuzzy pictures is imaged, has reached height
The requirement of image quality.
Embodiment 2
As shown in figure 4, compared with Example 1, rear group's eyeglass G2 of the present embodiment successively includes: with positive light coke
Four lens L4, the 5th lens L5 with positive light coke, the 6th lens L6 with negative power and with positive light coke
Seven lens L7.
The 5th lens L5 is balsaming lens, including the first front lens L51 and the first rear lens L52.
Hereinafter, showing the various numeric datas about the present embodiment.
Focal length F=6mm；Relative aperture FNO=2.1mm；FOV=66.5 ° of field angle.
3 the present embodiment lens construction parameter of table
The 5th lens L5 in the present embodiment is glued mirror, after the second surface of the first front lens L51 is first
The first surface of eyeglass L52.
Table 4 is the present embodiment camera lens asphericity coefficient
| Surface serial number | K | A4 | B6 | C8 | D10 |
| 15 | -99 | -0.001395907 | 3.06E-05 | -9.28E-07 | 2.38E-07 |
| 16 | 2.384767655 | -2.48E-04 | -9.69E-05 | 1.05E-05 | -1.54E-07 |
As shown in figure 5, for aberration diagram on the axis of the present embodiment, including axial chromatic aberration, the curvature of field and distortion.It is aobvious according to image
Show, the axial chromatic aberration of the present embodiment redgreenblue has all obtained good correction in full filed, can blur-free imaging, ensure that height
The demand of image quality.It is shown according to field curve, within the scope of full filed, T line and S line have preferable convergence, the curvature of field and astigmatism
It is very outstanding, guarantee that entire picture imaging is uniform.It is shown according to distortion curve, compared with Example 1, the distortion of the present embodiment
It is controlled in smaller range and distortion curve growth in periphery is more smooth, accomplished that the value of full filed TV distortion is respectively less than
1%.The present embodiment further improves the image quality of camera lens in the case where increasing by one piece of eyeglass, reduces and distorts and subtract
The small focal length of camera lens, performs better than it in low photograph.
As shown in fig. 6, being light chromaticity difference diagram, shown according to image, the present embodiment to the ratio chromatism, of redgreenblue and
Coma has carried out preferable amendment, makes that the phenomenon that picture does not have apparent purple boundary, red side or fuzzy pictures is imaged, has reached height
The requirement of image quality.
Embodiment 3
As shown in fig. 7, compared with Example 2, the pre-group eyeglass G1 of the present embodiment successively includes: the first lens group L1, tool
There are the second lens L2 of negative power and the third lens L3 with positive light coke.
The first lens group L1 is two pieces of eyeglasses, is followed successively by the second front lens L11 with positive light coke and has
Second rear lens L12 of negative power.
Hereinafter, showing the various numeric datas about the present embodiment.
Focal length F=5.8mm；Relative aperture FNO=1.8mm；FOV=66.5 ° of field angle.
5 the present embodiment lens construction parameter of table
The 5th lens L5 in the present embodiment is glued mirror, after the second surface of the first front lens L51 is first
The first surface of eyeglass L52.
Table 6 is the present embodiment camera lens asphericity coefficient
| Surface serial number | K | A4 | B6 | C8 | D10 |
| 17 | -14.48445452 | 0.0003119 | 2.63E-04 | -4.07E-06 | 1.10E-07 |
| 18 | -70.5084457 | 6.05E-04 | 1.70E-04 | -1.59E-06 | -6.08E-08 |
As shown in figure 8, for aberration diagram on the axis of the present embodiment, including axial chromatic aberration, the curvature of field and distortion.The present embodiment increases
One piece of eyeglass further decreases the focal length of camera lens, camera lens is made to exist on the basis of guaranteeing that the performance of embodiment 2 is basically unchanged
Imaging effect is more preferable in the case of low photograph, and by the moulded glass of script, aspherical to be changed to plastic cement aspherical to save cost and strictly control
Temperature drift processed makes its imaging effect still keep good state under high and low temperature extreme, increases the use scope of camera lens.
As shown in figure 9, being light chromaticity difference diagram, shown according to image, the present embodiment to the ratio chromatism, of redgreenblue and
Coma has carried out preferable amendment, makes that the phenomenon that picture does not have apparent purple boundary, red side or fuzzy pictures is imaged, has reached height
The requirement of image quality.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the utility model principle and objective with
Different modes carries out local directed complete set to it, and the protection scope of the utility model is subject to claims and not by above-mentioned specific
Implementation is limited, and each implementation within its scope is by the constraint of the utility model.
Claims (8)
1. a kind of high-resolution tight shot of no thermalization, which is characterized in that from the object side to image side successively include: with negative light focus
Pre-group eyeglass, diaphragm, the rear group's eyeglass and imaging surface with positive light coke of degree；The pre-group eyeglass successively includes first saturating
Microscope group, the second lens with negative power and the third lens with positive light coke；Rear group's eyeglass successively includes tool
There are the 4th lens of positive light coke, the 5th lens with positive light coke, the 6th lens with negative power and there is positive light
7th lens of focal power；
The ratio of the focal length of the focal length of the pre-group eyeglass and rear group's eyeglass is (- 2.5, -1.5)；The pre-group eyeglass
The ratio of the whole focal length of focal length and camera lens is (- 4, -2)；The ratio of the whole focal length of the focal length and camera lens of rear group's eyeglass
Value is (1.2,1.5).
2. the high-resolution tight shot of no thermalization according to claim 1, characterized in that in seven pieces of lens extremely
Contain six pieces of spheric glasses and one piece of aspherical lens less.
3. the high-resolution tight shot of no thermalization according to claim 1, characterized in that rear group's eyeglass and at
Optical filtering and protection glass are successively arranged between image planes.
4. the high-resolution tight shot of no thermalization according to claim 1, characterized in that first lens group
The ratio of the whole focal length of focal length and camera lens is (- 4, -2)；The ratio of the whole focal length of the focal length and camera lens of second lens be (-
1.5, -0.5)；The ratio of the whole focal length of the focal length and camera lens of the third lens is (0.8,1.8)；The focal length and mirror of 4th lens
The ratio of the whole focal length of head is (1,3)；The ratio of the whole focal length of the focal length and camera lens of 5th lens is (2,4)；6th thoroughly
The ratio of the whole focal length of the focal length and camera lens of mirror is (- 1.5, -0.5)；The whole focal length of the focal length and camera lens of 7th lens
Ratio is (1.5,5).
5. the high-resolution tight shot of no thermalization according to claim 1, characterized in that first lens group
The refractive index of rear lens is (1.4,1.5)；The refractive index of the third lens is (1.85,1.95).
6. the high-resolution tight shot of no thermalization according to claim 1, characterized in that after the optics of the camera lens
The whole focal length ratio of focal length and camera lens is (1,2).
7. the high-resolution tight shot of no thermalization according to claim 1, characterized in that the 7th lens it is non-
The center thickness of spherical surface and the ratio of edge thickness are (0.5,1.5)；The ratio of the whole focal length of its aspherical focal length and camera lens
Value is (4,6).
8. the high-resolution tight shot of no thermalization according to claim 1, characterized in that the outermost view of the camera lens
The light of field and the incidence angle of image planes are less than 10 degree.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820874191.8U CN208689243U (en) | 2018-06-07 | 2018-06-07 | Without the high-resolution tight shot of thermalization |
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| CN201820874191.8U CN208689243U (en) | 2018-06-07 | 2018-06-07 | Without the high-resolution tight shot of thermalization |
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| CN208689243U true CN208689243U (en) | 2019-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285879A (en) * | 2019-07-23 | 2021-01-29 | 江西凤凰光学科技有限公司 | Low-cost large aperture imaging lens |
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2018
- 2018-06-07 CN CN201820874191.8U patent/CN208689243U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285879A (en) * | 2019-07-23 | 2021-01-29 | 江西凤凰光学科技有限公司 | Low-cost large aperture imaging lens |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | "change of name, title or address" |
Address after: 314000 No.188, Taojing Road, Gaozhao street, Xiuzhou District, Jiaxing City, Zhejiang Province Patentee after: Jiaxing Zhongrun Optical Technology Co.,Ltd. Address before: 314000 Room 2F201-6, Building 6, Jiaxing Photovoltaic Science Park, 1288 Kanghe Road, Xiuzhou District, Jiaxing City, Zhejiang Province Patentee before: JIAXING ZHONGRUN OPTICAL SCIENCE AND TECHNOLOGY Co.,Ltd. |
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| CP03 | "change of name, title or address" |