CN104360466B - Small-size, low-cost, low-temperature-excursion and high-resolution zooming optical system - Google Patents

Small-size, low-cost, low-temperature-excursion and high-resolution zooming optical system Download PDF

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Publication number
CN104360466B
CN104360466B CN201410658394.XA CN201410658394A CN104360466B CN 104360466 B CN104360466 B CN 104360466B CN 201410658394 A CN201410658394 A CN 201410658394A CN 104360466 B CN104360466 B CN 104360466B
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China
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lens
focal length
lens group
low
optical system
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CN201410658394.XA
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CN104360466A (en
Inventor
何均顺
李中杰
潘华
邱盛平
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Union Optech Co Ltd
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Union Optech Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/177—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a negative front lens or group of lenses

Abstract

The invention discloses a small-size, low-cost, low-temperature-excursion and high-resolution zooming optical system. According to the technical scheme, the system comprises a first lens group, a diaphragm, a second lens group and a light sensing chip in sequence from an object space to an image space. The first lens group comprises a first lens, a second lens and a third lens in sequence. The second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens in sequence. The second lens, the sixth lens, the seventh lens and the eighth lens are plastic aspheric surface lens, and the other lenses are glass lens. The system has high photosensitive property, during indoor environment changing, performance is stable, refocusing is of no need, in a dark environment, a clear image can be obtained by shooting, cost is lowered, and meanwhile high resolution is guaranteed.

Description

A kind of small size, low cost, Low Drift Temperature, high-resolution varifocal optical system
【Technical field】
It is the present invention relates to a kind of varifocal optical system more particularly to a kind of small size for being applied to Indoor Monitoring System, low Cost, Low Drift Temperature, high-resolution, infrared confocal varifocal optical system.
【Background technology】
Current monitoring camera market starts toward family to develop using the direction with low cost, in the family use, needs Less volume and relatively low price, while with the lifting of network speed, the high-resolution picture of high-quality quickly can be passed It is defeated, therefore the resolution requirement more and more higher to monitoring camera.
, as the monitoring camera of matter, typically all in outdoor application, volume is larger, coverage for the height of current main flow on the market Larger, focal-distance tuning range is big, and corresponding cost is also high.And the small size camera lens that interior uses, it is tight shot mostly, coverage Size is fixed, it is impossible to meet monitoring requirement.Inexpensive monitoring camera on market, generally uses plastic lens in addition, due to modeling The shrinkage factor of glue material matter is high, in temperature change, rear lens focus can be made to produce large change, decline lens performance, although can Be controlled using critesistor in structure, but can therefore increase cost.
Indoor Video camera lens on market, mostly non-infrared confocal camera lens, can cause to clap when illumination is not strong at night in addition The picture taken the photograph is overall not clear enough.
【The content of the invention】
The present invention seeks to overcome the deficiencies in the prior art, there is provided a kind of small size, low cost, Low Drift Temperature, high-resolution Rate, infrared confocal twice varifocal optical system.
The present invention is achieved by the following technical solutions：
A kind of small size, low cost, Low Drift Temperature, high-resolution varifocal optical system, it is characterised in that：From object space to picture Fang Yici includes the first lens group 1, diaphragm 3, the second lens group 2 and sensitive chip 4, and first lens group 1 includes successively First lens 101, the second lens 102, the 3rd lens 103 totally three pieces of eyeglasses, second lens group 2 include the 4th lens successively 201st, the 5th lens 202, the 6th lens 203, the 7th lens 204, the 8th lens 205 totally five pieces of eyeglasses, second lens 102nd, the 6th lens 203, the 7th lens 204, the 8th lens 205 are plastic cement aspherical lens, and remaining lens is glass lens.
Small size, low cost, Low Drift Temperature, high-resolution varifocal optical system as above, it is characterised in that：It is described Diaphragm 3 is fixed with 4 relative position of sensitive chip, and first lens group 1, the second lens group 2 are relative respectively during zoom The sensitive chip 4 is moved, and first lens group 1 is also moved relative to the second lens group 2.
Small size, low cost, Low Drift Temperature, high-resolution varifocal optical system as above, it is characterised in that：The aspheric Face surface configuration meets below equation：
Small size, low cost, Low Drift Temperature, high-resolution varifocal optical system as above, it is characterised in that：It is described First lens group, 1 whole focal length is negative, wherein the first described lens 101,102 focal length of the second lens is negative, and the described 3rd is saturating 103 focal length of mirror is for just.
Small size, low cost, Low Drift Temperature, high-resolution varifocal optical system as above, it is characterised in that：It is described Second lens group, 2 whole focal length for just, wherein 201 focal length of the 4th lens for just, 202 focal length of the 5th lens be it is negative, 4th lens 201 and the 5th lens 202 bond together focal length for just, 203 focal length of the 6th lens be it is negative, it is described 7th lens, 204 focal length is negative, and 205 focal length of the 8th lens is for just.
Small size, low cost, Low Drift Temperature, high-resolution varifocal optical system as above, it is characterised in that：It is described The amount of movement of the first lens group 1 is less than 4.5mm, and the amount of movement of second lens group 2 is less than 3.25mm.
Compared with prior art, the present invention has the following advantages：
1st, zoom lens of the invention have been used containing four pieces of plastic cement aspheric lenses in eight pieces of interior eyeglasses, the zoom lens Although having used plastic cement aspherical lens, by Optimization Compensation, the effect of Low Drift Temperature is realized, temperature change is to camera lens Performance impact very little, in the range of -20 DEG C with 50 DEG C, the definition of camera lens will not be reduced.
2nd, zoom lens of the invention use the F-number at fixed aperture, short focus end to reach 1.8, and the F-number at focal length end reaches To 2.4, it is ensured that enough light-inletting quantities, make more visible picture can be still shot under dark environment, in reduces cost Also ensure that high-resolution simultaneously.
3rd, with first group of lens as peak, its maximum height is less than 33mm to whole camera lens of the invention, and overall volume is very It is little.
4th, zoom lens of the invention use Liao Liangge eyeglasses group, as the first lens group is moved forward and backward, its focal length meeting Change, second eyeglass group is used to focus, and focal length can change between 3mm-6mm, shooting angle 100 ° to 60 ° it Between change, shooting distance is particularly suitable for using indoors recently to 0.3m.
5th, camera lens of the invention realize it is whole infrared confocal, in visible wavelength section 430nm-650nm and infrared lamp ripple Various wave bands such as long section 830nm-870nm can make overall picture under conditions of existing while clear.
6th, the present invention can reach the resolution higher than 5,000,000 pixels, with 6.4mm'sCCD as a example by, the present invention can To reach center resolution higher than 14001100tvline, periphery 0.8H be 80% diagonal positions real scene shooting high resolution in 1100tvline；
【Description of the drawings】
Fig. 1 is the optical system diagram of the present invention.
In figure；1 is the first lens group；101 is the first lens；102 is the second lens；103 is the 3rd lens；2 is second Lens group；201 is the 4th lens；202 is the 5th lens；203 is the 6th lens；204 is the 7th lens；205 is the 8th lens； 3 is diaphragm；4 is sensitive chip.
【Specific embodiment】
The invention will be further described below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of smaller size smaller, low cost, Low Drift Temperature, high-resolution, infrared confocal twice Zoom optical System, includes the first lens group 1, the second lens group 2 and sensitive chip 4.In first lens group 1 and the second lens group Diaphragm 3 is provided between 2,3 scalable of diaphragm enters the number of beams of camera lens.First lens group 1 includes the first lens successively 101st, the second lens 102, the 3rd lens 103 totally three pieces of eyeglasses, second lens group 2 include the 4th lens the 201, the 5th successively Lens 202, the 6th lens 203, the 7th lens 204, the 8th lens 205 totally five pieces of eyeglasses, second lens the 102, the 6th are saturating Mirror 203, the 7th lens 204, the 8th lens 205 are plastic cement aspherical lens, and remaining lens is glass lens, diaphragm 3 with it is photosensitive Relative position between chip 4 is fixed, and the distance between the diaphragm 3 and sensitive chip 4 are 17.35mm.Described first Lens group 1, the second lens group 2 are moved relative to the sensitive chip 4 during zoom respectively, and first lens group 1 Move relative to the second lens group 2.First lens group 1 and the second lens group 2 are in the change procedure from short focus to long-focus In gradually draw close to diaphragm 3, subordinate list one for twice zoom lens of the present invention one embodiment.
The amount of movement of first lens group 1 is less than 4.5mm, and the amount of movement of second lens group 2 is less than 3.25mm.
First lens group, 1 whole focal length is negative, wherein the first described lens 101,102 focal length of the second lens are Negative, 103 focal length of the 3rd lens is for just.
Second lens group, 2 whole focal length for just, wherein 201 focal length of the 4th lens for just, the 5th lens 202 focal lengths be it is negative, the 4th lens 201 and the 5th lens 202 bond together focal length for just, the 6th lens 203 Focal length is negative, and 204 focal length of the 7th lens is negative, and 205 focal length of the 8th lens is for just.
Second lens 102 of first lens group 1 are plastic cement aspherical lens, the 6th lens of the second lens group 2 203rd, the 7th lens 204, the 8th lens 205 are plastic cement aspherical lens, and its aspherical surface shape meets below equation： In formula, Parameter c is the curvature corresponding to radius, and y is radial coordinate, and its unit is identical with length of lens unit, and k is circular cone conic section Coefficient.When k-factor is less than -1, face sigmoid curves is hyperbola, is parabola during equal to -1, is ellipse when between -1 to 0, It is circle during equal to 0, is oblateness during more than 0.α1To α8The coefficient corresponding to each radial coordinate is represented respectively, and its coefficient is shown in attached Table two, can accurately set the geomery of both-sided aspherical before and after lens by above parameter.
Subordinate list one：The actual design case of twice zoom lens.
Number in face Type Radius of curvature R Thickness Optical material Effective diameter K values
OBJ Object plane Infinity Infinity —— —— 0
1-a Sphere 26.88 0.75 h-ZlafF53b 14 0
1-b Sphere 5.745 2.792 —— 9.2 0
2-a Aspheric surface 9.244 0.78 APL5014CL 9.4 0
2-b Aspheric surface 4.269 1.824 —— 8.7 0
3-a Sphere 10.156 3.75 h-zf52a 8.5 0
3-b Sphere 18.058 17.471 —— 7 0
Air 0 -12.25 —— —— ——
STO Diaphragm 0 7.45 —— —— 0
Air 0 -4.358 —— —— ——
4-a Sphere 5.45 2.72 H-ZK9A 5.2 0
4-b,5-a Sphere -9.49 0.46 H-ZF88 5 ——
5-b Sphere -94.587 0.557 —— 4.8 0
6-a Aspheric surface -6.531 0.652 OKP4 4.8 0
6-b Aspheric surface -4.82 0.1 —— 5 -4.1674150
7-a Aspheric surface 4.701 1.331 OKP4 5 120.877
7-b Aspheric surface 2.276 0.558 —— 5.2 0
8-a Aspheric surface 4.095 1.55 APL5014CL 5.2 ——
8-b Aspheric surface -23.415 -0.031 —— 5.2 ——
Air 0 4.352 —— —— ——
Air 0 0.75 H-K9L —— ——
Air 0 1.21 —— —— ——
Sensitive chip —— —— —— —— ——
Note：In form, 1-a is the front of the first lens, and 1-b is the reverse side of the first lens, and the rest may be inferred ..., and 8-a is The front of eight lens, 8-b are the reverse side of the 8th lens, wherein the front 5-a weights of the reverse side 4-b and the 5th lens of the 4th lens Close.Do not fill in glass material for air, its thickness represents the middle heart septum of two pieces of eyeglasses of before and after
Subordinate list two：Asphericity coefficients.
Face numbering 2-a: Aspheric surface Face numbering 2-b: Aspheric surface
α1Secondary item parameter 0 α1Secondary item parameter 0
α2Secondary item parameter -3.6160034e-003 α2Secondary item parameter -0.0014295634
α3Secondary item parameter 1.1561486e-004 α3Secondary item parameter 0.00010318285
α4Secondary item parameter -3.033637e-006 α4Secondary item parameter -3.40099e-006
α5Secondary item parameter 2.934757e-008 α5Secondary item parameter 4.2313229e-008
α6Secondary item parameter 0 α6Secondary item parameter 0
α7Secondary item parameter 0 α7Secondary item parameter 0
α8Secondary item parameter 0 α8Secondary item parameter 0
Face numbering 6-a: Aspheric surface Face numbering 6-b: Aspheric surface
1 item parameter of α 0 1 item parameter of α 0
2 item parameters of α -0.00146488750 2 item parameters of α -0.0023122084
3 item parameters of α -0.00050136812 3 item parameters of α -0.00054226925
4 item parameters of α -6.89983e-005 4 item parameters of α 5.5113902e-006
5 item parameters of α 2.3766382e-005 5 item parameters of α 7.2728014e-006
6 item parameters of α -1.9994891e-006 6 item parameters of α -7.758352e-007
7 item parameters of α 0 7 item parameters of α 0
8 item parameters of α 0 8 item parameters of α 0
Face numbering 7-a: Aspheric surface Face numbering 7-b: Aspheric surface
1 item parameter of α 1 item parameter of α 0
2 item parameters of α -0.00061810844 2 item parameters of α 0.0037903638
3 item parameters of α -9.4277111e-005 3 item parameters of α 0.00025183218
4 item parameters of α 2.0360542e-005 4 item parameters of α -3.1417385e-005
5 item parameters of α -7.6967429e-006 5 item parameters of α -1.015677e-005
6 item parameters of α -4.0033792e-007 6 item parameters of α 8.4319108e-007
7 item parameters of α 0 7 item parameters of α 0
8 item parameters of α 0 8 item parameters of α 0
Face numbering 8-a: Aspheric surface Face numbering 8-b: Aspheric surface
1 item parameter of α 0 1 item parameter of α 0
2 item parameters of α 0.00193111230 2 item parameters of α 0.00133861164
3 item parameters of α 0.00060437344 3 item parameters of α -8.3377008e-005
4 item parameters of α 6.7111651e-006 4 item parameters of α 0.00011744885
5 item parameters of α -9.4763421e-006 5 item parameters of α -2.0582636e-005
6 item parameters of α 9.1424254e-007 6 item parameters of α 1.9751242e-006
7 item parameters of α 0 7 item parameters of α 0
8 item parameters of α 0 8 item parameters of α 0

Claims (5)

1. a kind of small size, low cost, Low Drift Temperature, high-resolution varifocal optical system, it is characterised in that：From the object side to the image side The first lens group (1), diaphragm (3), the second lens group (2) and sensitive chip (4), first lens group (1) are included successively Include the first lens (101), the second lens (102), the 3rd lens (103) totally three pieces of eyeglasses, second lens group (2) successively Include the 4th lens (201), the 5th lens (202), the 6th lens (203), the 7th lens (204), the 8th lens (205) successively Totally five pieces of eyeglasses, second lens (102), the 6th lens (203), the 7th lens (204), the 8th lens (205) are plastic cement Aspherical lens, remaining lens are glass lens；The diaphragm (3) is fixed with sensitive chip (4) relative position, and described first is saturating Lens group (1), the second lens group (2) are mobile relative to the sensitive chip (4) respectively during zoom, and first lens group (1) it is also mobile relative to the second lens group (2).
2. small size according to claim 1, low cost, Low Drift Temperature, high-resolution varifocal optical system, it is characterised in that：Institute State aspherical surface shape and meet below equation：
3. small size according to claim 1, low cost, Low Drift Temperature, high-resolution varifocal optical system, its feature exist In：First lens group (1) whole focal length is negative, wherein described the first lens (101), the second lens (102) focal length are Negative, the 3rd lens (103) focal length is for just.
4. small size according to claim 1, low cost, Low Drift Temperature, high-resolution varifocal optical system, its feature It is：Second lens group (2) whole focal length is for just, wherein the 4th lens (201) focal length is for just, the 5th lens (202) focal length be it is negative, the 4th lens (201) and the 5th lens (202) bonding together focal length for just, the described 6th is saturating Mirror (203) focal length is negative, and the 7th lens (204) focal length is negative, and the 8th lens (205) focal length is for just.
5. small size according to claim 1, low cost, Low Drift Temperature, high-resolution varifocal optical system, its feature exist In：The amount of movement of first lens group (1) is less than 4.5mm, and the amount of movement of second lens group (2) is less than 3.25mm.
CN201410658394.XA 2014-11-18 2014-11-18 Small-size, low-cost, low-temperature-excursion and high-resolution zooming optical system Active CN104360466B (en)

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CN106249392A (en) * 2016-09-26 2016-12-21 中山联合光电科技股份有限公司 A kind of varifocal optical system
CN106772966A (en) * 2017-01-16 2017-05-31 东莞市宇瞳光学科技股份有限公司 A kind of small volume resolution zoom lens high
CN106950683B (en) * 2017-04-28 2022-10-11 深圳市东正光学技术股份有限公司 Long focus lens
CN109324400B (en) * 2018-11-23 2023-06-06 福建福光股份有限公司 Compact-structure 2-time high-definition zoom glass-plastic lens and imaging method thereof
CN110927937B (en) * 2020-01-07 2023-11-28 福建福光天瞳光学有限公司 Day and night dual-purpose large-light-transmission fixed focus lens with black light level of 4mm and assembly method thereof
CN114002832B (en) * 2021-10-29 2023-07-04 江西晶超光学有限公司 Optical system, lens module and electronic equipment

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CN101592776A (en) * 2008-05-26 2009-12-02 索尼株式会社 Zoom lens and camera head
CN104133286A (en) * 2013-04-30 2014-11-05 扬明光学股份有限公司 Zoom lens
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