CN204883027U - Camera tight shot - Google Patents
Camera tight shot Download PDFInfo
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- CN204883027U CN204883027U CN201520505415.4U CN201520505415U CN204883027U CN 204883027 U CN204883027 U CN 204883027U CN 201520505415 U CN201520505415 U CN 201520505415U CN 204883027 U CN204883027 U CN 204883027U
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- lens
- tight shot
- focal length
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- camera
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- 230000005499 meniscus Effects 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 abstract description 3
- 230000004075 alteration Effects 0.000 description 17
- 230000003287 optical effect Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 206010010071 Coma Diseases 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000005308 flint glass Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model provides a camera tight shot includes front lens group, diaphragm and back lens group in proper order from the object space to the image space, front lens group includes first lens, second lens and third lens in proper order from the object space to the image space, back lens group includes fourth lens, the 5th lens and VI lenses, the fourth lens are the negative lens, the 5th lens are the positive lens, a set of negative contact lens of convex surface towards the image space is formed to fourth lens and the 5th lens, VI lenses is lenticular positive lens. The utility model provides a camera tight shot make its guarantee to have great aperture under the high prerequisite like matter, the characteristic of great visual field, the distance of working after great to has fine image quality.
Description
Technical field
The utility model relates to camera lens field, particularly a kind of camera tight shot.
Background technology
Digital photographing, shooting product add endless fast happy color to the life of people.Digital single-lens reflex camera standard tight shot always extremely shutterbugs and Professional Photography man pursue, existing tight shot mostly adopts double gauss optical system.Double gauss optical system is a kind of objective lens arrangement with larger market, its easily larger relative aperture of realization and comparatively long-focus, and be used for taking a picture, shooting, as camera lens object lens in the exact instrument such as plate-making, its structure has two cemented surfaces for color difference eliminating.But existing double gauss structure still has very large defect, back work distance is not enough, and each aberration is all larger, generally all needs designer to compare large change to curvature, interval and glass material, makes the image-forming objective lens of various precision optical instrument with this.Meanwhile, its double gauss optical system structure of existing camera tight shot is when standard-sized sheet aperture, and the senior aberration of full filed have impact on contrast and the resolution of image quality, and impact is actual to be used.
Utility model content
For above problem, the utility model patent object is to devise a kind of camera tight shot, makes it under the prerequisite ensureing high picture element, have larger aperture, characteristic compared with Large visual angle, larger back work distance, and has good image quality.
The utility model is achieved through the following technical solutions:
A kind of camera tight shot, comprise front lens group, diaphragm and rear lens group from the object side to the image side successively, described front lens group comprises the first lens, the second lens and the 3rd lens from the object side to the image side successively, described first lens are positive lens, described second lens are the falcate positive lens convex surface facing object space, and described 3rd convex lens surface is towards the negative meniscus of object space;
Described rear lens group comprises the 4th lens, the 5th lens and the 6th lens, described 4th lens are negative lens, described 5th lens are positive lens, and described 4th lens and the 5th lens composition bear balsaming lens convex surface facing a group of image space, and described 6th lens are lenticular positive lens.
Preferential, the first lens described in the utility model and the second lens meet following formula:
1.4f<f1<1.7f，0.5f<f12<0.7f；
Wherein, f is total focal length of described tight shot, and f1 is the focal length of described first lens, and f12 is the combined focal length of described first lens and described second lens.
Preferential, the 6th lens described in the utility model meet following formula:
0.9f<f6<1.2f；
Wherein, f is total focal length of described tight shot, and f6 is the focal length of described 6th lens.
Preferential, the 6th lens described in the utility model meet following formula:
3<∣r11/r12∣<5，r11>0，r12<0；
Wherein, r11 is the paraxial radius-of-curvature of the thing side of described 6th lens, and r12 is the paraxial radius-of-curvature in the face, image side of described 6th lens.
Accompanying drawing explanation
Referring to accompanying drawing, the utility model embodiment is described further, wherein:
Fig. 1 is the structural drawing of a kind of camera tight shot of the utility model;
In figure, each several part title is as follows:
L1 ~ L6-first lens ~ the 6th lens; P1, P2-first two sides of lens; P3, P4-second two sides of lens; P5, P6-the 3rd two sides of lens; P7, P8-the 4th two sides of lens; P9, P10-the 5th two sides of lens; P11, P12-the 6th two sides of lens; SP-diaphragm; PW-image planes.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The utility model proposes a kind of camera tight shot, refer to the structural drawing that Fig. 1 is a kind of camera tight shot of the utility model, comprise front lens group, diaphragm SP and rear lens group from the object side to the image side successively, described front lens group comprises the first lens L1, the second lens L2 and the 3rd lens L3 from the object side to the image side successively, and described rear lens group comprises the 4th lens L4, the 5th lens L5 and the 6th lens L6.P1 ~ P12 is the two sides of the first lens ~ the 6th lens, and PW is image planes.
Described first lens L1 is positive lens, and described second lens L2 is the falcate positive lens convex surface facing object space, and described 3rd lens L3 is convex surface facing the negative meniscus of object space; Described 4th lens L4 is negative lens, and described 5th lens L5 is positive lens, and described 4th lens L4 and the 5th lens L5 one group of forming convex surface facing image space bears balsaming lens, and namely P8 and P9 forms cemented surface, and described 6th lens L6 is lenticular positive lens.
Described first lens and the second lens meet following formula:
(1) 1.4f<f1<1.7f, (2) 0.5f<f12<0.7f; Wherein, f is total focal length of described tight shot, and f1 is the focal length of described first lens, and f12 is the combined focal length of described first lens and described second lens.This restrictive condition for ensureing that optical system has larger back work distance, and for the spherochromatism of control system.For making optical system realize flattened field, the system curvature of field need improve correction.If exceed the lower limit of condition (1), or the upper limit of condition (2), though be conducive to the bore reducing optical lens, be unfavorable for the increase of system back work distance; Equally, if exceed the upper limit of condition (1), or the lower limit of condition (2), optical system back work distance increases, but system imaging quality seldom arrives correction.Condition (1) and (2) make the positive light coke of system shift from front to back, when material is certain, positive light coke moves from front to back, after meeting system compensation aberration condition, the anterior negative power of system also reduces, and spherical aberration correction of checking colors is favourable.
Described 6th lens meet following formula:
0.9f<f6<1.2f; Wherein, f is total focal length of described tight shot, and f6 is the focal length of described 6th lens.In order to correcting colour spherical aberration and oblique spherical aberration, if exceed lower limit, the correction of spherochromatism can be conducive to, but can become unfavorable for oblique spherical aberration.Exceed the correction that the upper limit then can be conducive to oblique spherical aberration, but can be unfavorable to spherochromatism.
Described 6th lens also need to meet following formula:
3< ∣ r11/r12 ∣ <5, r11>0, r12<0; Wherein, r11 is the paraxial radius-of-curvature of the thing side of described 6th lens, and r12 is the paraxial radius-of-curvature in the face, image side of described 6th lens.In order to be that the positive spherical aberration of system is in minimum state, r12<0 is in order to reflective can the trying one's best of last one side does not reflex to imaging surface, thus reduces the impact eliminated ghost or dazzle light.
Embodiment one:
The focal length of the optical system of an embodiment in a kind of camera tight shot that the utility model provides is 50.1mm, field angle 46 °, and during relative aperture 1:1.8, its structural parameters and material parameter are in table 1:
Table 1 embodiment one structural parameters and material parameter
Distribute each lens powers and correct the curvature of field, front lens group adopts the thin lens structure of positive and negative separation, and front lens group dolly-out,s dolly-back than getting 0.8 ~ 0.83 times, and front lens group principal plane locations can be made to reach 26.5 millimeters.When the focal power of front lens group is 1, then the focal power absolute value of positive and negative thin lens is than being 2:1.5, and negative lens splits into the positive negative meniscus of two panels can increase radius-of-curvature, increases the variable of aberration correction and reduces senior aberration.Rear lens group is made up of negative power bent moon thick lens and positive light coke thin lens, first negative bent moon thick lens is made to consider as concentric lens, glass selects H-ZF2, and positive lens selects to have substantially identical refractive index H-LAK5A, and the curvature of field of rear lens group can be eliminated.For concentric face, the normal of chief ray and plane of refraction overlaps, and does not produce coma and astigmatism.But concentric lens can produce larger positive spherical aberration, change the shape of rear lens group and add spherical aberration, the aberration of cemented surface recoverable system.Such whole system just becomes five groups of six double gauss distressed structures, is the basic structure pattern of medium visual field, large aperture photographic field lens.
The utility model in order to increase back work distance from and miniaturization, the symmetry of structure will be destroyed.As far as possible solution makes each curvature radius bend towards diaphragm, selects the lanthanum flint glass of high-refractivity and low-dispersion to make positive lens, and the radius-of-curvature of lens is increased.Rear lens group cemented surface adopts the refractive index of both sides glass substantially equal and dispersion does not wait plane matches.The residual spherical aberration that before being used for compensating, group produces and aberration, due to the incident angle of cemented surface chief ray and refraction angle change little, on distortion and ratio chromatism, impact little.The position changing diaphragm and rear group of first surface can reduce oblique spherical aberration and senior astigmatism.
The above embodiment of the present utility model, does not form the restriction to the utility model protection domain.Any various other made according to technical conceive of the present utility model change and distortion accordingly, all should be included in the protection domain of the utility model claim.
Claims (4)
1. a camera tight shot, comprise front lens group, diaphragm and rear lens group from the object side to the image side successively, it is characterized in that, described front lens group comprises the first lens, the second lens and the 3rd lens from the object side to the image side successively, described first lens are positive lens, described second lens are the falcate positive lens convex surface facing object space, and described 3rd convex lens surface is towards the negative meniscus of object space;
Described rear lens group comprises the 4th lens, the 5th lens and the 6th lens, described 4th lens are negative lens, described 5th lens are positive lens, and described 4th lens and the 5th lens composition bear balsaming lens convex surface facing a group of image space, and described 6th lens are lenticular positive lens.
2. a kind of camera tight shot according to claim 1, is characterized in that, described first lens and the second lens meet following formula:
1.4f<f1<1.7f，0.5f<f12<0.7f；
Wherein, f is total focal length of described tight shot, and f1 is the focal length of described first lens, and f12 is the combined focal length of described first lens and described second lens.
3. a kind of camera tight shot according to claim 1, is characterized in that, described 6th lens meet following formula:
0.9f<f6<1.2f；
Wherein, f is total focal length of described tight shot, and f6 is the focal length of described 6th lens.
4. a kind of camera tight shot according to claim 1, is characterized in that, described 6th lens meet following formula:
3<∣r11/r12∣<5，r11>0，r12<0；
Wherein, r11 is the paraxial radius-of-curvature of the thing side of described 6th lens, and r12 is the paraxial radius-of-curvature in the face, image side of described 6th lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520505415.4U CN204883027U (en) | 2015-07-13 | 2015-07-13 | Camera tight shot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520505415.4U CN204883027U (en) | 2015-07-13 | 2015-07-13 | Camera tight shot |
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| CN204883027U true CN204883027U (en) | 2015-12-16 |
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| CN201520505415.4U Expired - Fee Related CN204883027U (en) | 2015-07-13 | 2015-07-13 | Camera tight shot |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105739046A (en) * | 2016-04-14 | 2016-07-06 | 南京昂驰光电科技有限公司 | Rear lens barrel assembly for starlight-level road monitoring convertible lens |
| CN106772937A (en) * | 2016-12-19 | 2017-05-31 | 福建福光股份有限公司 | A kind of 50 millimeters of focusing machine visual lens of 8,000,000 pixel |
| CN108107557A (en) * | 2018-01-10 | 2018-06-01 | 佛山华国光学器材有限公司 | A kind of high magnification bilateral telecentric lens of long reach |
| CN110007433A (en) * | 2019-03-15 | 2019-07-12 | 广东奥普特科技股份有限公司 | A kind of fixed-focus line sweeps camera lens |
| CN110346906A (en) * | 2019-06-30 | 2019-10-18 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| CN110989132A (en) * | 2019-11-26 | 2020-04-10 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN111694129A (en) * | 2020-07-16 | 2020-09-22 | 北创光电科技(邵阳)有限公司 | Middle focus video lens with 65mm focal length |
| CN117261220A (en) * | 2023-10-25 | 2023-12-22 | 深圳市点睛创视技术有限公司 | Objective lens system for 3D printing |
-
2015
- 2015-07-13 CN CN201520505415.4U patent/CN204883027U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105739046A (en) * | 2016-04-14 | 2016-07-06 | 南京昂驰光电科技有限公司 | Rear lens barrel assembly for starlight-level road monitoring convertible lens |
| CN106772937B (en) * | 2016-12-19 | 2022-09-16 | 福建福光股份有限公司 | 800 ten thousand pixels 50 millimeters tight machine vision camera lens |
| CN106772937A (en) * | 2016-12-19 | 2017-05-31 | 福建福光股份有限公司 | A kind of 50 millimeters of focusing machine visual lens of 8,000,000 pixel |
| CN108107557A (en) * | 2018-01-10 | 2018-06-01 | 佛山华国光学器材有限公司 | A kind of high magnification bilateral telecentric lens of long reach |
| CN108107557B (en) * | 2018-01-10 | 2024-01-16 | 佛山华国光学器材有限公司 | High-magnification double-side telecentric lens with long working distance |
| CN110007433A (en) * | 2019-03-15 | 2019-07-12 | 广东奥普特科技股份有限公司 | A kind of fixed-focus line sweeps camera lens |
| CN110007433B (en) * | 2019-03-15 | 2024-03-26 | 广东奥普特科技股份有限公司 | Fixed focal line scanning lens |
| CN110346906A (en) * | 2019-06-30 | 2019-10-18 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
| US11500178B2 (en) | 2019-11-26 | 2022-11-15 | Genius Electronic Optical (Xiamen) Co., Ltd. | Optical imaging lens |
| CN110989132B (en) * | 2019-11-26 | 2021-09-03 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN110989132A (en) * | 2019-11-26 | 2020-04-10 | 玉晶光电(厦门)有限公司 | Optical imaging lens |
| CN111694129A (en) * | 2020-07-16 | 2020-09-22 | 北创光电科技(邵阳)有限公司 | Middle focus video lens with 65mm focal length |
| CN111694129B (en) * | 2020-07-16 | 2024-05-31 | 北创光电科技(邵阳)有限公司 | Medium-focus video lens with focal length of 65mm |
| CN117261220A (en) * | 2023-10-25 | 2023-12-22 | 深圳市点睛创视技术有限公司 | Objective lens system for 3D printing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20180713 |