CN200983032Y - Ultra-extensive angle camera lens - Google Patents
Ultra-extensive angle camera lens Download PDFInfo
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- CN200983032Y CN200983032Y CN 200520111113 CN200520111113U CN200983032Y CN 200983032 Y CN200983032 Y CN 200983032Y CN 200520111113 CN200520111113 CN 200520111113 CN 200520111113 U CN200520111113 U CN 200520111113U CN 200983032 Y CN200983032 Y CN 200983032Y
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Abstract
The fish-eye image-pickup lens relates to an optical lens device and is adapted for coordinative miniaturized television monitoring vidicon, the fish-eye image-pickup lens comprises six lenses which are arranged as a convex and concave negative lens, a plane-concave negative lens, a biconvex positive lens, a biconcave negative lens, a biconvex positive lens, a biconvex positive lens in sequence. The fourth piece and the fifth piece comprise a cemented lens array, a front array is formed from the first piece to the third piece, and a joint focal distance is f ' <front>, a back array is formed from the third piece to the sixth piece, and a joint focal distance is f ' <back>, 25 < f ' <front> < 40, 2< f ' <back> / f ' < 2.5, 25 f ' < r <3> <= infinity, 0.95 < d <4> / f ' < 1.05, 1.68 < n <3> < 1.76 < v <3> <31, 1.72 < n <4> < 29.5, 1.64 < n <5> <1.7, 56 < v <5>. The front array and the back array are both optically-positive mineral focal degree lens array, a back main face of the front array is arranged at the right side of a front main face of the back array and the distance between the two main faces is larger, a bigger value is taken by utilizing the focal distances of the front and back arrays, thereby the fish-eye image-pickup lens is favorable for the adjustment of various optical aberrations, and a long back intercept and the miniaturization of lens are realized.
Description
Technical field:
The utility model relates to optical camera lens device, is specially adapted to supporting miniaturization TV rig camera.
Prior art:
Being used for the supporting bugeye lens great majority of TV monitoring and controlling video camera all is short-focus lens.For the rear cut-off distance (BFL) that makes camera lens is longer, adopt scheme as shown in Figure 1 usually, i.e. preceding group of camera lens lens combination with negative power, back group of lens combination of camera lens with positive light coke, after the light beam incident parallel with optical axis, through preceding group disperse after, assemble by back group again.Because the back group is to the imaging again of in-plant intermediary image, its imaging rear cut-off distance is longer than the focal length value of back group, reaches the purpose of elongating rear cout off distance.
The deficiency of this scheme is that preceding group still back is organized a drift angle all bigger (combined focal length is all got less value before general) of going up light beam of bearing.In order to reduce the picture element influence of senior aberration to system, normally adopt the quantity that increases lens during design or adopt heavy lanthanide glass or the group of the lanthanides glass that refractive index ratio is higher, Abbe coefficient (ν) is bigger, satisfy the picture element requirement, make the cost performance of camera lens relatively poor.The while camera lens will be made miniaturization and also compare difficulty.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned defective, provides that a kind of imaging performance is good, cost performance is high and the super wide-angle TV monitoring and controlling pick-up lens of miniaturization.
Scheme of the present utility model is:
Utility model optical devices of the present invention are made up of six lens.Wherein four is to separate the sphere simple lens, and two is cemented doublet.Parallel plate glass is the cover glass (substituting with K9 glass during calculating) before the CCD picture pick-up device.The optical material of six spherical lenses is in proper order: BaK3, ZK7, ZF3, ZF4, LaK4, LaK2.The profile of six spherical lenses is successively: convex-concave negative lens, plano-concave negative lens, biconvex positive lens, double-concave negative lens, biconvex positive lens, biconvex positive lens.Wherein the 4th biconcave lens and the 5th biconvex lens are formed the balsaming lens group.First to the 3rd formation lens preceding group, its combined focal length is with f '
BeforeExpression; The 4th to the 6th back group of constituting camera lens, its combined focal length is with f '
AfterExpression.The focal length of camera lens is with f ' expression.The light hurdle is located between the 3rd and the 4th.The condition that optical devices must satisfy is as follows:
25＜f '
Before/ f '＜40,2＜f '
After/ f '＜2.5............. (1)
25f′＜r
3≤∞....................................(2)
0.95＜d
4/f′＜1.05...............................(3)
1.68＜n
3＜1.76，27＜ν
3＜31.......................(4)
60＜ν
1 60＜ν
2....................................(5)
1.72＜ν
4＜1.8，25.3＜ν
4＜29.5；
1.64＜n
5＜1.7，56＜ν
5............................(6)
Advantage of the present utility model is:
By group before the camera lens that adopts positive light coke and the new optical texture combination of back group, the drift angle that makes its axle of bearing go up light beam is less, helps the correction of various aberrations.We just can obtain the preferable result of image quality by adopting comparatively cheap optical material.At numerical aperture F1.8 and characteristic frequency is under the situation of 63Lp/mm, and transport function (MTF) value of full visual field all reaches more than 0.6.Suitable configurations by new focal length combination has also realized the result of rear cout off distance value greater than 2 times of lens focus values (f ') and miniaturization.Make the utility model cost performance height, use in the telephotography field that is highly suitable for super wide-angle monitoring.
Description of drawings:
Fig. 1 is the bugeye lens perfect optics structural representation that prior art negative power lens combination commonly used is organized before as camera lens.A, B represent preceding group and back group of camera lens, F ' respectively
ABe preceding group back focus, F
BAnd F '
BIt is the front and back focus of back group.F ' is the back focus of camera lens.
Fig. 2 is the bugeye lens perfect optics structural representation that the utility model device adopts.
Fig. 3 is the utility model device optics combination principal plane locations configuration schematic diagram.H
A, H '
ABe the front principal point and the posterior principal point of group before the camera lens; H
B, H '
BBe front principal point and the posterior principal point of organizing behind the camera lens.Wherein, H '
AAnd H
BBetween distance be the spacing distance d of preceding group and back group.According to symbolic rule, it is a negative value.
Fig. 4 is the actual optical structure chart of the utility model device.
Fig. 5 is that the utility model device is got f '=2.5mm, F1.8, the geometric-optical aberration curve (curves such as spherical aberration, astigmatism, distortion, ratio chromatism) of 2 ω=110 °.Spherical aberration, aberration curve are polychrome (d, g, f, c) aberration curves.Its horizontal ordinate indicating value is a unit with mm all except that distortion is represented with the % ratio.
Fig. 6 is the multicolor property curve map of the utility model device, and wherein meridian direction is
Δ H-tanu curve, sagitta of arc direction are Δ y-tanu curve.Performance diagram when left-hand side two figure are illustrated in 0.7 ω; Performance diagram when right side two figure represent 1 ω.Its ordinate indicating value is unit with mm.
Fig. 7 is the utility model device in f=2.5mm, F1.8,2 ω=110 °, characteristic frequency is 0～63Lp/mm, 0 ω, 0.7 ω, polychrome MTF (optical transfer function) curve map of visual fields such as 1 ω.
Embodiment: the utility model optical devices of invention are made up of six spherical lenses.The 7th (7) parallel plate glass is the cover glass before the CCD picture pick-up device.The optical material of six spherical lenses is in proper order: BaK3, ZK7, ZF3, ZF4, LaK4, LaK2.Cover glass substitutes with K9 glass.The profile of six spherical lenses is successively: first (1) convex-concave negative lens, second (2) plano-concave negative lens, the 3rd (3) biconvex positive lens, the 4th (4) double-concave negative lens, the 5th (5) biconvex positive lens, the 6th (6) biconvex positive lens.The 4th (4) and the 5th (5) form the balsaming lens group.First (1) to the 3rd (3) constitutes preceding group of lens, and its combined focal length is with f '
BeforeExpression; The 4th (4) to the 6th (6) constitute back group of camera lens, f '
AfterThe complex focus of expression back group.The light hurdle is arranged between the 3rd (3) and the 4th (4).F ' is the focal length value of camera lens.The condition that optical devices must satisfy is as follows:
25＜f '
Before/ f '＜40,2＜f '
After/ f '＜2.5............. (1)
25f′＜r
3≤∞....................................(2)
0.95＜d
4/f′＜1.05...............................(3)
1.68＜n
3＜1.76，27＜ν
3＜31.......................(4)
60＜ν
1 60＜ν
2....................................(5)
1.72＜ν
4＜1.8，25.3＜ν
4＜29.5；
1.64＜n
5＜1.7，56＜ν
5............................(6)
The purpose of setting the above-mentioned condition that must satisfy is:
The purpose that condition (1) is set is the front principal plane sequence of positions displacement of organizing behind preceding back interarea of organizing of assurance camera lens and the camera lens, and bigger spacing distance negative value is arranged.
The purpose that condition (2) is set is that after preventing aberration balancing, it is too short that the rear cut-off distance of camera lens becomes when the distortion value of camera lens was diminished.
The purpose that condition (3) is set is that group back interarea diminishes before preventing, it is necessary to guarantee that simultaneously rear cout off distance is not less than 2f.
The purpose that condition (4) is set is in the senior aberration (as spherical aberration), to produce bigger first-order aberration coefficient+S on reducing axle as far as possible
1,+C
1With+C
2With first and second generation of balance-C
1With-C
2And back group cemented surface generation-S
1
The purpose that condition (5) is set reduces first and second lens generation-C
2
The purpose that condition (6) is set is to reduce as far as possible that axle is gone up and influence that the outer senior aberration of axle is organized after to camera lens, and controls r
9Make it to produce bigger-S
1,-C
1With+C
2The elementary amount that produces with other faces is complementary.
Principal character of the present utility model is: by the optical texture combination of group before the camera lens that adopts positive light coke and back group, and the back interarea of group places the back to organize the bigger distance in right side of front principal plane before making, when realizing that lens focus is short, can select bigger front and back group focal length value, the axle that group is born before and after making is gone up and the drift angle of axle outer light beam diminishes, and helps the correction of various aberrations.Both made and adopted comparatively cheap optical material, the camera lens of design still can obtain image quality preferably, also can guarantee the requirement of the rear cut-off distance of camera lens greater than 2 times of lens focus values and camera lens miniaturization simultaneously.Make the utility model cost performance height.
R is the radius-of-curvature of sphere in the subordinate list 1, and d is airspace between the thickness of lens or lens.N
dBe the refractive index of the d spectral line of optical material, ν
dBe its Abbe coefficient.
Table 1 is an example of the present utility model:
E.F.L=2.5mm, Fno.=1.8,2 ω=110 °, light path length overall TL=16.61
Picture side intercept B.F.L=5.22mm (not comprising cover glass), and colour killing spectral line: d (g, c)
| Sequence number | R | d | n d | ν d |
| 1 | 18.187 | 0.70 | 1.54678 | 62.8 |
| 2 | 4.207 | 1.75 | ||
| 3 | ∞ | 0.80 | 1.61309 | 60.59 |
| 4 | 3.365 | 2.41 | ||
| 5 | 9.300 | 3.25 | 1.71741 | 29.49 |
| 6 | -9.300 | 2.30 | ||
| 7 | ∞ (light hurdle) | 0.60 | ||
| 8 | -13.900 | 0.70 | 1.72822 | 28.34 |
| 9 | 3.000 | 2.00 | 1.6405 | 60.09 |
| 10 | -6.109 | 0.10 | ||
| 11 | 6.546 | 2.00 | 1.69211 | 54.54 |
| 12 | -31.190 | 4.58 | ||
| 13 | ∞ | 0.80 | 1.5168 | 64.2 |
| 14 | ∞ | 0.005 | ||
| 15 | ∞ (image planes) |
In the present case, get: f '
Before=94.72mm f '
After=5.737mm
Preceding group is d=-119.01mm with the actual interval of back group
Its initial aberration coefficients is: Σ s
1=0.0166 Σ s
2=-0.01 Σ s
3=0.0124 Σ s
4=0.0101 Σ s
5=0.3677 Σ c
1=0.0002 Σ c
2=-0.0006
From result of calculation: by new optical texture combination, only need to adopt comparatively cheap optical material, also can obtain to reach F1.8 in numerical aperture, characteristic frequency be 63 lines right/situation of mm under, polychrome transport function (MTF) value of full visual field is all in the result of the preferable image quality more than 0.6.Simultaneously the rear cut-off distance value of camera lens is also greater than the focal length value of 2 times of camera lenses.Make the utility model cost performance height, be beneficial in the telephotography field of super wide-angle monitoring and apply.
Claims (2)
1. ultra wide-angle imaging camera lens; it is characterized in that comprising that six-element lens is followed successively by: first (1) biconvex positive lens; second (2) plano-concave negative lens; the 3rd (3) biconvex positive lens; the 4th (4) biconcave lens; the 5th (5) biconvex positive lens; the 6th (6) biconvex positive lens; the 7th (7) parallel flat; the 4th (4) and the 5th (5) form the balsaming lens group, and the light hurdle is arranged between the 3rd (3) and the 4th (4), and eyeglass (7) is the cover glass before the CCD picture pick-up device; first (1) to the 3rd (3) constitutes preceding group of camera lens, and its complex focus is f '
Before, the 4th (4) to the 6th (6) constitute back group of camera lens, its complex focus f '
After, f ' is the focal length value of camera lens, the condition that optical devices must satisfy is as follows:
25＜f '
Before/ f '＜40,2＜f '
After/ f '＜2.5 ... ... ... (1)
25f′＜r
3≤∞ ........................................(2)
0.95＜d
4/f′＜1.05 ..........................................(3)
1.68＜n
3＜1.76，27＜v
3＜31....................................(4)
60＜v
1 60＜v
2 .........................................(5)
1.72＜n
4＜1.8，25.3＜v
4＜29.5；
1.64＜n
5＜1.7，56＜v
5 .......................................(6)。
2. ultra wide-angle imaging camera lens according to claim 1 is characterized in that organizing the combination of lenses that all adopts positive light coke with the back group before it, and preceding group back interarea places the back to organize the right side of front principal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520111113 CN200983032Y (en) | 2005-07-07 | 2005-07-07 | Ultra-extensive angle camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520111113 CN200983032Y (en) | 2005-07-07 | 2005-07-07 | Ultra-extensive angle camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200983032Y true CN200983032Y (en) | 2007-11-28 |
Family
ID=38910189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520111113 Expired - Fee Related CN200983032Y (en) | 2005-07-07 | 2005-07-07 | Ultra-extensive angle camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200983032Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840057B (en) * | 2010-05-12 | 2012-01-11 | 秦皇岛视听机械研究所 | Basic structure consisting of five groups of six fisheye lenses for digital projector |
| CN101762866B (en) * | 2008-12-25 | 2012-05-23 | 比亚迪股份有限公司 | Wide-angle lens and camera |
| CN102621667A (en) * | 2011-01-27 | 2012-08-01 | 株式会社腾龙 | Wide-angle monofocal lens |
| CN102053342B (en) * | 2009-10-29 | 2013-05-29 | 比亚迪股份有限公司 | Ultra-wide-angle lens |
| CN103605201A (en) * | 2013-11-20 | 2014-02-26 | 厦门爱劳德光电有限公司 | High resolution optical camera lens |
| CN107797258A (en) * | 2017-11-20 | 2018-03-13 | 宁波永新光学股份有限公司 | A kind of optical imaging lens |
| CN109073867A (en) * | 2015-12-23 | 2018-12-21 | 6115187加拿大公司暨伊美景象公司 | Miniature wide-angle imaging len |
| CN110007435A (en) * | 2014-01-17 | 2019-07-12 | 大立光电股份有限公司 | Photographing optical lens and image-taking device |
-
2005
- 2005-07-07 CN CN 200520111113 patent/CN200983032Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762866B (en) * | 2008-12-25 | 2012-05-23 | 比亚迪股份有限公司 | Wide-angle lens and camera |
| CN102053342B (en) * | 2009-10-29 | 2013-05-29 | 比亚迪股份有限公司 | Ultra-wide-angle lens |
| CN101840057B (en) * | 2010-05-12 | 2012-01-11 | 秦皇岛视听机械研究所 | Basic structure consisting of five groups of six fisheye lenses for digital projector |
| CN102621667A (en) * | 2011-01-27 | 2012-08-01 | 株式会社腾龙 | Wide-angle monofocal lens |
| CN103605201A (en) * | 2013-11-20 | 2014-02-26 | 厦门爱劳德光电有限公司 | High resolution optical camera lens |
| CN103605201B (en) * | 2013-11-20 | 2016-08-17 | 厦门爱劳德光电有限公司 | Optical lens |
| CN110007435A (en) * | 2014-01-17 | 2019-07-12 | 大立光电股份有限公司 | Photographing optical lens and image-taking device |
| CN110007435B (en) * | 2014-01-17 | 2021-09-17 | 大立光电股份有限公司 | Photographing optical lens and image capturing device |
| CN109073867A (en) * | 2015-12-23 | 2018-12-21 | 6115187加拿大公司暨伊美景象公司 | Miniature wide-angle imaging len |
| CN107797258A (en) * | 2017-11-20 | 2018-03-13 | 宁波永新光学股份有限公司 | A kind of optical imaging lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071128 |