CN201555978U - Day-night dual-use miniature wide angle zoom lens system - Google Patents

Day-night dual-use miniature wide angle zoom lens system Download PDF

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Publication number
CN201555978U
CN201555978U CN2009201824361U CN200920182436U CN201555978U CN 201555978 U CN201555978 U CN 201555978U CN 2009201824361 U CN2009201824361 U CN 2009201824361U CN 200920182436 U CN200920182436 U CN 200920182436U CN 201555978 U CN201555978 U CN 201555978U
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Prior art keywords
lens
zoom
focal power
combination
day
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Expired - Fee Related
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CN2009201824361U
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Chinese (zh)
Inventor
林峰
姚金龙
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Fujian Normal University
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Fujian Normal University
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Abstract

The utility model relates to a day-night dual-use miniature wide angle zoom lens system, which is applied to high-definition optical imaging lenses inside video cameras of various security monitoring places. The day-night dual-use miniature wide angle zoom lens system sequentially comprises a first lens group of negative focal power, a second lens group of positive focal power, and a diaphragm positioned between the first lens group and the second lens group along the direction of an optical axis. The day-night dual-use miniature wide angle zoom lens system is characterized in that the first lens group is formed by sequentially arraying and combining a first lens, a second lens and a third lens; the concave surface of the falcate first lens of the negative focal power faces an image surface; the double-surface concave second lens is of the negative focal power; the falcate third lens is of the positive focal power; the second lens group of the positive focal power is formed by sequentially arraying and combining a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens; the double-surface convex fourth lens is of the positive focal power; the double-surface convex fifth lens is of the positive focal power; the double-surface concave sixth lens is of the negative focal power; the double-surface convex seventh lens is of the positive focal power; and the double-surface convex eighth lens is of the positive focal power. The day-night dual-use miniature wide angle zoom lens system has the advantages of increasing zoom ratio, expanding the space range of moving target clear imaging, having a zoom range capable of reaching 4-11mm and the like.

Description

The mini wide-angle zoom lens of day and night system
Technical field
The utility model relates to day and night wide-angle zoom lens system, is applied to the high-resolution optical imagery camera lens in the video camera of various safety monitorings place.
Background technology
In protection and monitor field, because the diversity of monitoring occasion, people are to the demand of uninterrupted monitoring camera-shooting day and night and highly resolve popularizing of ball cover video camera, and the performance index such as zoom ratio, wide spectrum blur-free imaging and structural volume of the optical lens system of monitoring usefulness have been proposed more and more higher requirement.
Usually, Zoom lens system mainly contains three kinds of versions: four constituent elements, three constituent elements and two constituent elements.Many focuses Zoom lens system of two constituent elements because its mechanical-optical setup is simple, is easy to assembling and setting, and the yields height is cheap for manufacturing cost, is applied to the security protection TV monitor system in large quantities, the market share height.Owing to be subjected to the restriction of constituent element and eyeglass number, its optical system is difficult to obtaining balance preferably aspect the performance index such as big zoom ratio, broad spectrum high resolution and cramped construction but simultaneously.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of zoom ratio greater than 2.65, short burnt field angle is greater than 90 °, the optical system total length is less than 11.5 times of burnt squares of weak point, and short defocused section square is greater than the day and night wide-angle zoom lens system of 1.6 times of burnt squares of weak point.Another technical matters to be solved in the utility model provide a kind of in whole zooming range visible spectral coverage and the near infrared spectral coverage day and night wide-angle zoom lens system of aberration correction simultaneously.
The technical scheme of the utility model technical solution problem is: (A) day and night wide-angle zoom lens system, comprise first lens combination of negative power, second lens combination of positive light coke successively along optical axis direction, and the diaphragm between first lens combination and second lens combination, it is characterized in that first lens combination is arranged in a combination towards second lens of first lens of the falcate negative power of image planes, two-sided spill negative power, the 3rd lens of falcate positive light coke in regular turn by concave surface; Second lens combination of positive light coke is arranged in a combination in regular turn by the 7th lens of the 6th lens of the 5th lens of the 4th lens of two-sided convex positive light coke, two-sided convex positive light coke, two-sided spill negative power, two-sided convex positive light coke and the 8th lens of two-sided convex positive light coke.
(B) the described day and night wide-angle zoom lens of A system is characterized in that second lens, the 3rd lens glue together composition gummed mirror mutually; The 6th lens, the 7th lens glue together mutually forms another gummed mirror.
(C) the described day and night wide-angle zoom lens of A or B system is characterized in that satisfying following condition:
(i)f′ 1＜f′ 2；
(ii)2.65＜f′ T/f′ W＜3.1；
(iii)2.15＜-f′ 1/f′ W＜2.55；
(iv)1.2＜dd 1/(f′ T-f′ W)＜1.4；
(v)60＜γ 2，60＜γ 7；
(vi)10.5＜Lw/f′w＜11.8；
(vii) 1.65＜fbw/f ' w＜1.8; Wherein,
F ' 1It is the first lens combination focal length;
F ' 2It is the second lens combination focal length;
F ' TBe the focal length of Zoom lens system at telescope end;
F ' WBe the focal length of Zoom lens system in wide-angle side;
Dd 1The displacement of first lens combination when being zoom;
γ 2It is the Abbe coefficient of second lens;
γ 7It is the Abbe coefficient of the 7th lens;
Lw is a Zoom lens system when being positioned at wide-angle side, the distance of its first lens incidence surface to image planes along optical axis direction;
Fbw is the rear cut-off distance that Zoom lens system is positioned at wide-angle side.
The utlity model has following advantage:
1, choose by miniaturization Design and rational optical texture, improved the zoom ratio of optical lens, expanded the spatial dimension of moving-target blur-free imaging, be applied to 1/3 cun video camera, its zooming range can reach 4～11mm.
2, reduce the physical dimension of conventional two component zooming camera lenses effectively, made it to be applicable to most of miniaturization spherical camera system.
3, by rational material parameter coupling, widen it and used the spectral line scope, under near infrared floor light condition, also can obtain good imaging expressive force, satisfied 24 hours uninterrupted day and night demands of monitoring.
Description of drawings
Accompanying drawing 1 is that the utility model Zoom lens system is the cut-open view that cutting plane dissects out with the perpendicular by optical axis.
1 is first lens among the figure, and 2 is second lens, and 3 is the 3rd lens, the 4th, and diaphragm, 5 is the 4th lens, and 7 is the 5th lens, and 9 is the 6th lens, and 11 is the 7th lens, 13 is the 8th lens.
Fig. 2 be Zoom lens system shown in Figure 1 in specific embodiment along optical axis OO 1Direction is with each pel vegetarian noodles sequence number i of curvature R (i) expression.
Fig. 3 A is the utility model Zoom lens system embodiment wide-angle side spherical aberration performance diagram.
Fig. 3 B is the utility model Zoom lens system embodiment telescope end spherical aberration performance diagram.
Fig. 4 A is the utility model Zoom lens system embodiment wide-angle side curvature of field performance diagram.
Fig. 4 B is the utility model Zoom lens system embodiment telescope end curvature of field performance diagram.
Fig. 5 A is the utility model Zoom lens system embodiment wide-angle side distortion performance curve map.
Fig. 5 B is the utility model Zoom lens system embodiment telescope end distortion performance curve map.
Embodiment
As embodiment, the utility model is along optical axis OO 1Direction comprises first lens combination of negative power and second lens combination and the diaphragm between two lens combination (4) of positive light coke successively.
First lens combination comprises three lens: first lens (1) are negative powers, are the meniscus shaped lens of concave surface towards image planes; Second lens (2) are negative powers, are two-sided spill lens; The 3rd lens (3) are the meniscus shaped lens of concave surface towards image planes, are positive light coke.
Second lens combination comprises five lens: the 4th lens (5) are positive light cokes, are two-sided convex lens; The 5th lens (7) are positive light cokes, are two-sided convex lens; The 6th lens (9) are negative powers, are two-sided spill lens; The 7th lens (11) are positive light cokes, are two-sided convex lens; The 8th lens (13) are positive light cokes, are two-sided convex lens.
In order to obtain the good result of color difference eliminating, second lens (2) the 3rd lens (3) glue mutually become a gummed mirror; The 6th lens (9) and the 7th lens (11) can compose another balsaming lens mutually.
Each parameter of the utility model Zoom lens system satisfies following condition:
(i)f’ 1＜0＜f’ 2
(ii)2.65＜f’ T/f’ W＜3.1
(iii)2.15＜-f’ 1/f’ W＜2.55
(iv)1.2＜dd 1/(f’ T-f’ W)＜1.4
(v)60＜γ 2，60＜γ 2
(vi)10.5＜L W/f’ W＜11.8
(vii)1.65＜fb W/f’ W＜1.8
Wherein,
F ' 1It is the first lens combination focal length;
F ' 2It is the first lens combination focal length;
F ' TBe the focal length of Zoom lens system at telescope end;
F ' WBe the focal length of Zoom lens system in wide-angle side;
Dd 1The displacement of first lens combination when being zoom;
γ 2It is the Abbe coefficient of two lens;
γ 7It is the Abbe coefficient of the 7th lens;
L WBe Zoom lens system when being positioned at wide-angle side, the distance of its first lens incidence surface to image planes along optical axis direction;
Fb WIt is the rear cut-off distance that Zoom lens system is positioned at wide-angle side.
Condition (i) relates to the focal power of two mirror groups and distributes, and the virtual image that first lens combination of negative power produces helps elongating the image distance of second lens combination, thereby has guaranteed the anti-long distance structure of system in wide-angle side.
Condition is (ii) relevant with zoom ratio, and the zoom ratio of two component zooming camera lenses depends mainly on the amplitude of variation of the imaging multiplying power of back group in the zoom process.
Condition (iii) relates to the proportion of the first lens combination focal power, if focal length is oversize, will cause the zoom stroke to increase, and is unfavorable for the miniaturization of system; If focal length is too short, then increase the system high aberration, need more eyeglass, more complicated structure suppresses the growth of aberration.
Condition (iv) relates to the zoom stroke of first lens combination, suitable zoom stroke helps obtaining rational balance in zoom ratio, system bulk and imaging evaluation, too small zoom stroke will be difficult to guarantee suitable zoom ratio, and excessive stroke then is unfavorable for the control of physical dimension.
(v) relate to the material selection of second lens and the 7th lens, higher Abbe coefficient helps the chromatism of position of control system to condition, guarantees the imaging performance of system at the burnt position of length overall near infrared spectral line effectively.
(vi) relevant with the length of wide-angle side Zoom lens system, this ratio too young pathbreaker increases the senior aberration of system to condition significantly, and then has limited the logical light quantity of system, and this ratio then is unfavorable for the miniaturization of camera lens too greatly.
(vii) relevant with the rear cut-off distance of wide-angle side Zoom lens system, this ratio too young pathbreaker limits the versatility of camera lens to condition, and this ratio is unfavorable for the correction of off-axis aberration too greatly, and has restricted the zoom stroke of first lens combination.
Following table 1 is for satisfying above-mentioned condition (i)～(a kind of preference data vii).Carry out normalization by the wide-angle side focal length, all length unit is a millimeter, and used variable-definition is as follows:
R (i) expression i curvature of face radius;
D (i) expression is along the interval between optical axis direction i face to the i+1 face;
Ndi represents along the d optical index of optical axis direction i right side of face lens material;
γ i represents along the Abbe coefficient of optical axis direction i right side of face lens material.
Table 1
Face sequence number (i) Radius of curvature R (i) Interval d (i) Refractive index (ndi) Abbe number (γ i)
1 2.9462 0.2277 1.6385 55.49
2 1.2567 0.9723
3 -4.1745 0.2024 1.4875 70.14
4 1.5005 0.6806 1.7552 27.52
5 4.4629 D1
6 Diaphragm D2
7 3.0631 0.8223 1.7883 47.40
8 -7.8450 0.0253
9 4.0771 0.4352 1.7883 47.40
10 -21.0805 0.0903
11 -3.6812 0.9741 1.8467 23.78
12 1.6837 0.7033 1.4875 70.14
13 -3.4003 0.0253
14 4.4328 0.4301 1.8063 25.37
15 -31.6250 D3
Following table 2 is the wide-angle side of variable interval in the utility model Zoom lens system embodiment data and the systematic parameter and the variable interval data of telescope end.
Table 2
F# ω D1 D2 D3
Wide-angle side 1.75 91 2.649 1.455 1.722
Telescope end 2.96 29.5 0.2 0.1 3.776
F# is a system picture side F number in the table, and ω is a field angle of object, and unit is degree, and D1 is the interval of first lens combination to diaphragm, and D2 is the interval of diaphragm to second lens combination, and D3 is the interval that second mirror is organized image planes thoroughly, and the unit of D1, D2 and D3 all is mm.
When the focal length of the utility model Zoom lens system changes to telescope end from wide-angle side, first lens combination and second lens combination can guarantee that according to motion at interval shown in the following table 3 image planes are stable, and simultaneously whole lens system optics length overall shortens.
Table 3
F’ 1 f’ 2 f’ T f’ W dd 1 γ 2 γ 7 L W fb W
-2.33 2.5 1 2.92 2.45 70.14 70.14 9.65 1.72
Last table 3 is according to above-mentioned condition (i)～(parameter value of the utility model Zoom lens system that vii) calculates.In the table:
F ' 1It is the first lens combination focal length;
F ' 2It is the second lens combination focal length;
F ' TBe the focal length of Zoom lens system at telescope end;
F ' WBe the focal length of Zoom lens system in wide-angle side;
Dd 1The displacement of first lens combination when being zoom;
γ 2It is the Abbe coefficient of second lens;
γ 7It is the Abbe coefficient of the 7th lens;
L WBe Zoom lens system when being positioned at wide-angle side, the distance of its first lens incidence surface to image planes along optical axis direction;
Fb WIt is the rear cut-off distance that Zoom lens system is positioned at wide-angle side.
Satisfy the Zoom lens system of above-mentioned condition, compact conformation, zooming range is big, visible light and night all can obtain good image quality evaluation under the near infrared lighting condition in the daytime.Fig. 3 A, Fig. 3 B, Fig. 4 A, Fig. 4 B, Fig. 5 A, Fig. 5 B are respectively the various geometrical aberration characteristics of this structure camera lens at wide-angle side and telescope end.

Claims (3)

1. day and night wide-angle zoom lens system is along optical axis direction 00 1Comprise first lens combination of negative power, second lens combination of positive light coke successively, and the diaphragm (4) between first lens combination and second lens combination, it is characterized in that first lens combination is arranged in a combination in regular turn by second lens (2), falcate positive light coke the 3rd lens (3) of concave surface towards first lens (1) of the falcate negative power of image planes, two-sided spill negative power; Second lens combination of positive light coke is by the 6th lens (9) of the 5th lens (7) of the 4th lens (5) of two-sided convex positive light coke, two-sided convex positive light coke, two-sided spill negative power; The 7th lens (11) of two-sided convex positive light coke and the 8th lens (13) of two-sided convex positive light coke are arranged in a combination in regular turn.
2. day and night wide-angle zoom lens according to claim 1 system is characterized in that second lens (2), the 3rd lens (3) glue together mutually and forms the gummed mirror; The 6th lens (9), the 7th lens (11) glue together mutually forms another gummed mirror.
3. day and night wide-angle zoom lens according to claim 1 and 2 system is characterized in that satisfying following condition:
(i)f′ 1＜f′ 2；
(ii)2.65＜f′ T/f′ W＜3.1；
(iii)2.15＜-f′ 1/f′ W＜2.55；
(iv)1.2＜dd 1/(f′ T-f′ W)＜1.4；
(v)60＜γ 2，60＜γ 7；
(vi)10.5＜Lw/f′w＜11.8；
(vii)1.65＜fbw/f′w＜1.8；
Wherein, f ' 1It is the first lens combination focal length;
F ' 2It is the second lens combination focal length;
F ' TBe the focal length of Zoom lens system at telescope end;
F ' WBe the focal length of Zoom lens system in wide-angle side;
Dd 1The displacement of first lens combination when being zoom;
γ 2It is the Abbe coefficient of second lens;
γ 7It is the Abbe coefficient of the 7th lens;
L WBe Zoom lens system when being positioned at wide-angle side, the distance of its first lens incidence surface to image planes along optical axis direction;
Fb WIt is the rear cut-off distance that Zoom lens system is positioned at wide-angle side.
CN2009201824361U 2009-08-10 2009-08-10 Day-night dual-use miniature wide angle zoom lens system Expired - Fee Related CN201555978U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
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CN102819093A (en) * 2012-08-27 2012-12-12 福建福光数码科技有限公司 Low-distortion high-resolution day and night dual-purpose miniature pick-up lens
CN104076497A (en) * 2013-03-28 2014-10-01 浙江大华技术股份有限公司 Zoom lens and digital camera
CN105242385A (en) * 2015-11-05 2016-01-13 福建福光股份有限公司 Glass aspheric day and night optical zoom lens with low zoom ratio
WO2016019487A1 (en) * 2014-08-04 2016-02-11 深圳市大族激光科技股份有限公司 Optical lens
CN105445908A (en) * 2015-12-24 2016-03-30 中山联合光电科技股份有限公司 High-image quality, large-image frame and small-distortion optical imaging system
CN106249390A (en) * 2015-06-09 2016-12-21 韩华泰科株式会社 Zoom lens system
CN106461916A (en) * 2014-09-03 2017-02-22 大族激光科技产业集团股份有限公司 Photographic objective lens
CN110244441A (en) * 2019-06-13 2019-09-17 山东省科学院海洋仪器仪表研究所 A kind of halomereid microoptic imaging lens
WO2020024599A1 (en) * 2018-08-03 2020-02-06 宁波舜宇车载光学技术有限公司 Optical lens
TWI687716B (en) * 2016-04-25 2020-03-11 揚明光學股份有限公司 Zoom lens

Cited By (21)

* Cited by examiner, † Cited by third party
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CN102819093B (en) * 2012-08-27 2014-11-05 福建福光数码科技有限公司 Low-distortion high-resolution day and night dual-purpose miniature pick-up lens
CN102819093A (en) * 2012-08-27 2012-12-12 福建福光数码科技有限公司 Low-distortion high-resolution day and night dual-purpose miniature pick-up lens
CN104076497A (en) * 2013-03-28 2014-10-01 浙江大华技术股份有限公司 Zoom lens and digital camera
CN104076497B (en) * 2013-03-28 2015-06-17 浙江大华技术股份有限公司 Zoom lens and digital camera
WO2016019487A1 (en) * 2014-08-04 2016-02-11 深圳市大族激光科技股份有限公司 Optical lens
CN106461918B (en) * 2014-08-04 2018-08-10 大族激光科技产业集团股份有限公司 Optical lens
CN106461918A (en) * 2014-08-04 2017-02-22 大族激光科技产业集团股份有限公司 Optical lens
US9835834B2 (en) 2014-08-04 2017-12-05 Han's Laser Technology Industry Group Co., Ltd. Optical lens
CN106461916B (en) * 2014-09-03 2018-07-06 大族激光科技产业集团股份有限公司 Photographic field lens
CN106461916A (en) * 2014-09-03 2017-02-22 大族激光科技产业集团股份有限公司 Photographic objective lens
CN106249390B (en) * 2015-06-09 2020-10-23 韩华泰科株式会社 Zoom lens system
CN106249390A (en) * 2015-06-09 2016-12-21 韩华泰科株式会社 Zoom lens system
CN105242385B (en) * 2015-11-05 2017-11-21 福建福光股份有限公司 The day and night varifocal optical lens of the Glass aspheric of small zoom ratio
CN105242385A (en) * 2015-11-05 2016-01-13 福建福光股份有限公司 Glass aspheric day and night optical zoom lens with low zoom ratio
CN105445908B (en) * 2015-12-24 2018-02-13 中山联合光电科技股份有限公司 One kind is as matter is high, picture is big, the small optical imaging system of distortion
CN105445908A (en) * 2015-12-24 2016-03-30 中山联合光电科技股份有限公司 High-image quality, large-image frame and small-distortion optical imaging system
TWI687716B (en) * 2016-04-25 2020-03-11 揚明光學股份有限公司 Zoom lens
WO2020024599A1 (en) * 2018-08-03 2020-02-06 宁波舜宇车载光学技术有限公司 Optical lens
US11971608B2 (en) 2018-08-03 2024-04-30 Ningbo Sunny Automotive Optech Co., Ltd Optical lens assembly
CN110244441A (en) * 2019-06-13 2019-09-17 山东省科学院海洋仪器仪表研究所 A kind of halomereid microoptic imaging lens
CN110244441B (en) * 2019-06-13 2023-12-15 山东省科学院海洋仪器仪表研究所 Microscopic optical imaging lens for marine plankton

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