CN105223680A - Economical day and night high definition zoom lens and control method thereof - Google Patents
Economical day and night high definition zoom lens and control method thereof Download PDFInfo
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- CN105223680A CN105223680A CN201510739126.5A CN201510739126A CN105223680A CN 105223680 A CN105223680 A CN 105223680A CN 201510739126 A CN201510739126 A CN 201510739126A CN 105223680 A CN105223680 A CN 105223680A
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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
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Abstract
The present invention relates to a kind of economical day and night high definition zoom lens and control method thereof, belong to camera lens field, technical matters to be solved is for intelligent security guard video camera system provides a kind of optical index high, optics target surface is large, resolution is not less than the camera lens of three mega pixels, the technical scheme solved the problem is as follows: be disposed with focal power in the optical system of described camera lens along light direction be negative front group and focal power is positive rear group, iris is provided with between described front group and rear group, described front group is disposed with negative crescent moon lens, concave-concave non-spherical lens and biconvex lens, described rear group is disposed with positive crescent moon non-spherical lens, biconvex lens, plano-concave lens and biconvex non-spherical lens.The present invention is the reasonable distribution focal power of forward and backward group in the optical texture of retrofocus type, makes whole optical texture insensitive, expands field angle and corrects the aberration of camera lens, can adapt to the requirement of high definition video shooting by aspherical lens.
Description
Technical field
The present invention relates to a kind of economical day and night high definition zoom lens and control method thereof, belong to lens technology field.
Background technology
Along with traffic network is day by day intensive, traffic is day by day busy, in order to safeguard traffic safety, prevent traffic jam, to realize under busy road conditions in perfect order, for development intelligent transportation system provides the day and night confocal camera lens of a high resolving power to have realistic meaning.Early stage tight shot structure is simple, performance index are low, can only be adaptive with the SD CCD of 20 ~ 300,000 pixels or cmos camera in the sharpness of image, shooting effect is general, picture is worth little, the needs that monitoring field " is seen " can only be adapted to, even do not read the number-plate number, not see Chu's character features.Such resolution can not meet far away present high-definition camera requirement and society to the qualitative demand of supervisory system.
Summary of the invention
The congruence pursued with CCTV camera, as the critical component that monitoring image gathers, manufacturer's also development new technologies while lifting camera lens quality, as the popularization of the birth of aspherical lens, infrared lens, the rise etc. of the corresponding camera lens of mega pixel, its target only has one: improving image definition, improves image quality.Better picture quality, higher sharpness, is not only the keyword of current each camera lens producer requirement technology, eternal the pursuing a goal of camera lens product especially.
The present invention is intended to adapt to above-mentioned development trend, for intelligent security guard video camera system provides a kind of optical index is high, optics target surface large, resolution is not less than three mega pixels economical day and night high definition zoom lens and control method thereof, this camera lens can " video camera of high definition supports the use, and camera system is met the requirement of scenery at the high definition pick-up of high photokinesis variation range environment with 16:9 standard 1/3.
In order to solve the problems of the technologies described above, technical scheme one of the present invention is: a kind of economical day and night high definition zoom lens, in the optical system of described camera lens along light direction be disposed with focal power be negative before organize A and focal power is rear group of positive B, iris C is provided with between described front group of A and rear group of B, before described, group A is disposed with negative crescent moon lens A-1, concave-concave non-spherical lens A-2 and biconvex lens A-3, and described rear group of B is disposed with positive crescent moon non-spherical lens B-1, biconvex lens B-2, plano-concave lens B-3 and biconvex non-spherical lens B-4.
In further technical scheme, the airspace between described front group of A and rear group of B is 21.69mm.
In further technical scheme, the airspace between the negative crescent moon lens A-1 before described in group A and concave-concave non-spherical lens A-2 is 5.27mm, and the airspace between described concave-concave non-spherical lens A-2 and biconvex lens A-3 is 0.1mm.
In further technical scheme, the airspace between the biconvex lens A-3 before described in group A and light hurdle C is 13.14mm, and the airspace between the positive crescent moon non-spherical lens B-1 in described rear group of B and light hurdle C is 8.55mm.
In further technical scheme, airspace between positive crescent moon non-spherical lens B-1 in described rear group of B and biconvex lens B-2 is 0.11mm, airspace between described biconvex lens B-2 and plano-concave lens B-3 is 0.1mm, the airspace 1.09mm between described plano-concave lens B-3 and biconvex non-spherical lens B-4.
In further technical scheme, the physical construction of described camera lens comprises and sets gradually front main cylinder and rear main cylinder along light direction, described front main cylinder is fixedly connected with rear main cylinder, auto iris assembly is provided with between described front main cylinder and rear main cylinder, be placed with for settling negative crescent moon lens A-1 in described front main cylinder, the front microscope base of concave-concave non-spherical lens A-2 and biconvex lens A-3, be placed with for settling positive crescent moon non-spherical lens B-1 in described rear main cylinder, biconvex lens B-2, the rear microscope base of plano-concave lens B-3 and biconvex non-spherical lens B-4, described front main cylinder is arranged with the front cam that can drive front microscope base movement, described rear main cylinder is arranged with the rear cam that can drive rear microscope base movement, described front cam is provided with front cam to be lock onto before on front main cylinder and dials nail, described rear cam is provided with can by the rear group nail of rear camlock on rear main cylinder.
In further technical scheme, described front microscope base is provided with the step that three keep front arrangement of mirrors sheet right alignment, the inner edge, front end of described front microscope base add one section save negative crescent moon lens A-1 trim ring melt section, described concave-concave non-spherical lens A-2 back edge is equipped with the small stair ensureing airspace between concave-concave non-spherical lens A-2 and biconvex lens A-3, and described biconvex lens A-3 rear end is located by the step of front microscope base rear end.
In further technical scheme, described rear microscope base is provided with the step that four ensure rear arrangement of mirrors sheet right alignment, the inner edge, front end of described rear microscope base add one section save positive crescent moon non-spherical lens B-1 trim ring melt section, the back edge of described positive crescent moon non-spherical lens B-1 is equipped with the small stair ensureing airspace between positive crescent moon non-spherical lens B-1 and biconvex lens B-2, the first spacer ring ensureing airspace is therebetween provided with between described biconvex lens B-2 and plano-concave lens B-3, the second spacer ring ensureing airspace is therebetween provided with between described plano-concave lens B-3 and biconvex non-spherical lens B-4, described biconvex non-spherical lens B-4 rear end is located by the step of rear microscope base rear end.
In further technical scheme, the middle surface of contact of described front main cylinder and rear main cylinder is respectively arranged with a square opening position and reference column, and described front cam is provided with to the side of rear cam the stopper slot limiting corresponding microscope base movement travel.
In order to solve the problems of the technologies described above, technical scheme two of the present invention is: a kind of control method of economical day and night high definition zoom lens, adopt above-mentioned economical day and night high definition zoom lens, first pass through to rotate front cam, rear cam drives front microscope base respectively, rear microscope base moves, when being adjusted to predetermined focal length, lock front cam, rear cam respectively by front group of nail, rear nail of dialling again, prevent focal length variations.
Compared with prior art, the present invention has following beneficial effect:
(1) this camera lens reasonable distribution focal power of front group of A and rear group of B in the optical texture of retrofocus type, makes whole optical texture insensitive; By the optical glass material of reasonable selection forward and backward two groups seven, select the optical glass material of high refractivity, low dispersion, what the aberration of camera lens was tried one's best is little as far as possible.
(2) first eyeglass of front group of A adopts negative moon dental structure, expands the field angle of camera lens entirety; Second eyeglass of front group of A adopts double-convex aspherical lenses, expands field angle and the aberration of correction mirror head part; First eyeglass of rear group of B and the 4th eyeglass all can adopt material to be the aspherical lens of E48R, use aspheric design, have corrected the aberrations such as the spherical aberration of the entirety of camera lens, coma, the resolving power of camera lens is got a promotion widely; The requirement of 3,000,000 pixel high definition video shootings can be adapted to.Owing to adding the use of aspherical lens, decrease number of lenses, cost savings the cost of camera lens, be more suitable for batch production.
(3) when optical design, aberration correction and balance are carried out to the wide spectral range of 480nm ~ 850nm, make camera lens have excellent picture element at wide spectral range, achieve wide spectral confocal.This camera lens can not only blur-free imaging under photoenvironment in the daytime, night pole low-light (level) or zero illumination environment under also can blur-free imaging by infrared light filling, the monitoring continuously that achieves 24 hours, and when day and night switching not defocusing, focus without the need to scene.
(4) second eyeglass of front group of A and first eyeglass of rear group of B all add certain thickness leveling step at edge, optimize the design of two place's spacer rings.The mechanical parts material of overall camera lens can adopt PC material, and structure is simple, and mechanical parts quantity is few, also makes the miniaturization of camera lens, lightweight becomes possibility.
Accompanying drawing explanation
Fig. 1 is the optical system diagram of the embodiment of the present invention.
Fig. 2 is the mechanical construction drawing of the embodiment of the present invention.
Mark in Fig. 1: before A., group A, A-1. bear crescent moon lens A-1, A-2. concave-concave non-spherical lens A-2, A-3. biconvex lens A-3; B. B is organized afterwards, B-1. positive crescent moon non-spherical lens B-1, B-2. biconvex lens B-2, B-3. plano-concave lens B-3, B-4. biconvex non-spherical lens B-4; C. iris C.
Mark in Fig. 2: 1. negative crescent moon lens A-1,2. concave-concave non-spherical lens A-2,3. biconvex lens A-3,4. microscope base before, main cylinder, 6. front cam 5., 7. auto iris assembly, cam 8., microscope base 9., 10. main cylinder after, 11. first spacer rings, 12. second spacer rings, 13. biconvex non-spherical lens B-4,14. plano-concave lens B-3,15. biconvex lens B-2,16. positive crescent moon non-spherical lens B-1, nail after 17., dials nail before 18..
Embodiment
In order to allow above-mentioned feature and advantage of the present invention become apparent, special embodiment below, and coordinate accompanying drawing, be described in detail below.
As shown in Figure 1, a kind of economical day and night high definition zoom lens, in the optical system of described camera lens along light from left to right incident direction be disposed with focal power be negative before organize A and focal power is rear group of positive B, iris C is provided with between described front group of A and rear group of B, before described, group A is disposed with negative crescent moon lens A-1, concave-concave non-spherical lens A-2 and biconvex lens A-3, and described rear group of B is disposed with positive crescent moon non-spherical lens B-1, biconvex lens B-2, plano-concave lens B-3 and biconvex non-spherical lens B-4.
In embodiments of the present invention, the airspace between described front group of A and rear group of B is 21.69mm; Airspace between negative crescent moon lens A-1 before described in group A and concave-concave non-spherical lens A-2 is 5.27mm, and the airspace between described concave-concave non-spherical lens A-2 and biconvex lens A-3 is 0.1mm; Airspace between biconvex lens A-3 before described in group A and light hurdle C is 13.14mm, and the airspace between the positive crescent moon non-spherical lens B-1 in described rear group of B and light hurdle C is 8.55mm; Airspace between positive crescent moon non-spherical lens B-1 in described rear group of B and biconvex lens B-2 is 0.11mm, airspace between described biconvex lens B-2 and plano-concave lens B-3 is 0.1mm, the airspace 1.09mm between described plano-concave lens B-3 and biconvex non-spherical lens B-4.
The optical system be made up of above-mentioned lens set reaches following optical index: (1) focal length: f '=2.8-12mm; (2) relative aperture D/F=1/1.6; (3) field angle 2 ω: 132 ° ~ 38 ° (effective imaging surface n ' >=φ 6.7mm); (4) spectral range: 480nm ~ 850nm is suitable for; (5) resolution: adaptive with the high-definition camera of 3,000,000 pixels; (6) light path overall length ∑ L≤51mm.
Because the resolution of this camera lens is very high, and the resolution of peripheral field and central market does not allow to make a big difference, so will guarantee the accurate, steadily and good hand touch of the actions such as the concentricity of each constituent element of system and focusing in structural design.
As shown in Figure 2, the physical construction of described camera lens comprise along light from left to right incident direction set gradually front main cylinder 5 and rear main cylinder 10, described front main cylinder 5 and rear main cylinder 10 are fixedly connected with by two spacing nails, auto iris assembly 7 is provided with between described front main cylinder 5 and rear main cylinder 10, be placed with for settling negative crescent moon lens A-1(1 in described front main cylinder 5), concave-concave non-spherical lens A-2(2) and biconvex lens A-3(3) front microscope base 4, be placed with for settling positive crescent moon non-spherical lens B-1(16 in described rear main cylinder 10), biconvex lens B-2(15), plano-concave lens B-3(14) and biconvex non-spherical lens B-4(13) rear microscope base 9, described front main cylinder 5 is arranged with the front cam 6 that can drive the movement of front microscope base 4, described rear main cylinder 10 is arranged with the rear cam 8 that can drive the movement of rear microscope base 9, described front cam 6 is provided with front cam 6 to be lock onto before on front main cylinder 5 and dials nail 18, described rear cam 8 is provided with the rear group of nail 17 that rear cam 8 can be lock onto on rear main cylinder 10.Full shot mechanical parts material all can adopt PC material, realizes lightweight.
In embodiments of the present invention, in order to fixing len and ensure between each eyeglass airspace, devise spacer ring respectively and utilize aspheric special processing process to ensure airspace: described concave-concave non-spherical lens A-2(2) back edge is equipped with and ensures concave-concave non-spherical lens A-2(2) and biconvex lens A-3(3) between the small stair of airspace, not only solve because space between eyeglass is too little and cause the unmanageable problem of spacer ring, but also effectively stop veiling glare by plating one deck delustring ink film at small stair; Described positive crescent moon non-spherical lens B-1(16) back edge be equipped with ensure positive crescent moon non-spherical lens B-1(16) and biconvex lens B-2(15) between the small stair of airspace, make structure simpler; Described biconvex lens B-2(15) and plano-concave lens B-3(14) between be provided with the first spacer ring 11 ensureing airspace therebetween, described plano-concave lens B-3(14) and biconvex non-spherical lens B-4(13) between be provided with the second spacer ring 12 ensureing airspace therebetween.
In embodiments of the present invention, described front microscope base 4 is provided with the step that three keep front arrangement of mirrors sheet right alignment, as long as ensure the right alignment of three step internal diameters, just can ensure the right alignment of front arrangement of mirrors sheet; What the inner edge, front end of described front microscope base 4 added one section of predetermined length melts section, saves negative crescent moon lens A-1(1) physical construction of trim ring; Described biconvex lens A-3(3) rear end located by the step of front microscope base 4 rear end.Described rear microscope base 9 is provided with the step that four ensure rear arrangement of mirrors sheet right alignment, ensures the right alignment of four steps, just can ensure the right alignment of rear arrangement of mirrors sheet; What the inner edge, front end of described rear microscope base 9 added one section of predetermined length melts section, saves positive crescent moon non-spherical lens B-1(16) physical construction of trim ring; Described biconvex non-spherical lens B-4(13) rear end located by the step of rear microscope base 9 rear end.
In embodiments of the present invention, described front main cylinder 5 and the middle surface of contact of rear main cylinder 10 are respectively arranged with a square opening position and reference column, ensure the position of front main cylinder 5 and rear main cylinder 10; Described front cam 6 is provided with to the side of rear cam 8 stopper slot limiting corresponding microscope base movement travel, guarantees the angle of corresponding stopper slot, just located the movement travel of front group of A, rear group of B.
As shown in Figure 2, a kind of control method of economical day and night high definition zoom lens, adopt above-mentioned economical day and night high definition zoom lens, first drive the corresponding movement before and after optical axis of front microscope base 4, rear microscope base 9 respectively by rotation front cam 6, rear cam 8, achieve the function changing optical system focal length; When being adjusted to predetermined focal length, then locking front cam 6, rear cam 8 respectively by front group of nail 18, rear nail 17 of dialling, preventing the focal length confirmed from moving at video camera or moving cam in vibrations process and cause focal length variations.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. an economical day and night high definition zoom lens, it is characterized in that: in the optical system of described camera lens along light direction be disposed with focal power be negative before organize A and focal power is rear group of positive B, iris C is provided with between described front group of A and rear group of B, before described, group A is disposed with negative crescent moon lens A-1, concave-concave non-spherical lens A-2 and biconvex lens A-3, and described rear group of B is disposed with positive crescent moon non-spherical lens B-1, biconvex lens B-2, plano-concave lens B-3 and biconvex non-spherical lens B-4.
2. economical day and night high definition zoom lens according to claim 1, is characterized in that: the airspace between described front group of A and rear group of B is 21.69mm.
3. economical day and night high definition zoom lens according to claim 1 and 2, it is characterized in that: the airspace between the negative crescent moon lens A-1 before described in group A and concave-concave non-spherical lens A-2 is 5.27mm, and the airspace between described concave-concave non-spherical lens A-2 and biconvex lens A-3 is 0.1mm.
4. economical day and night high definition zoom lens according to claim 1 and 2, it is characterized in that: the airspace between the biconvex lens A-3 before described in group A and light hurdle C is 13.14mm, and the airspace between the positive crescent moon non-spherical lens B-1 in described rear group of B and light hurdle C is 8.55mm.
5. economical day and night high definition zoom lens according to claim 1 and 2, it is characterized in that: the airspace between the positive crescent moon non-spherical lens B-1 in described rear group of B and biconvex lens B-2 is 0.11mm, airspace between described biconvex lens B-2 and plano-concave lens B-3 is 0.1mm, the airspace 1.09mm between described plano-concave lens B-3 and biconvex non-spherical lens B-4.
6. economical day and night high definition zoom lens according to claim 1, it is characterized in that: the physical construction of described camera lens comprises and sets gradually front main cylinder and rear main cylinder along light direction, described front main cylinder is fixedly connected with rear main cylinder, auto iris assembly is provided with between described front main cylinder and rear main cylinder, be placed with for settling negative crescent moon lens A-1 in described front main cylinder, the front microscope base of concave-concave non-spherical lens A-2 and biconvex lens A-3, be placed with for settling positive crescent moon non-spherical lens B-1 in described rear main cylinder, biconvex lens B-2, the rear microscope base of plano-concave lens B-3 and biconvex non-spherical lens B-4, described front main cylinder is arranged with the front cam that can drive front microscope base movement, described rear main cylinder is arranged with the rear cam that can drive rear microscope base movement, described front cam is provided with front cam to be lock onto before on front main cylinder and dials nail, described rear cam is provided with can by the rear group nail of rear camlock on rear main cylinder.
7. economical day and night high definition zoom lens according to claim 6, it is characterized in that: described front microscope base is provided with the step that three keep front arrangement of mirrors sheet right alignment, the inner edge, front end of described front microscope base add one section save negative crescent moon lens A-1 trim ring melt section, described concave-concave non-spherical lens A-2 back edge is equipped with the small stair ensureing airspace between concave-concave non-spherical lens A-2 and biconvex lens A-3, and described biconvex lens A-3 rear end is located by the step of front microscope base rear end.
8. economical day and night high definition zoom lens according to claim 6, it is characterized in that: described rear microscope base is provided with the step that four ensure rear arrangement of mirrors sheet right alignment, the inner edge, front end of described rear microscope base add one section save positive crescent moon non-spherical lens B-1 trim ring melt section, the back edge of described positive crescent moon non-spherical lens B-1 is equipped with the small stair ensureing airspace between positive crescent moon non-spherical lens B-1 and biconvex lens B-2, the first spacer ring ensureing airspace is therebetween provided with between described biconvex lens B-2 and plano-concave lens B-3, the second spacer ring ensureing airspace is therebetween provided with between described plano-concave lens B-3 and biconvex non-spherical lens B-4, described biconvex non-spherical lens B-4 rear end is located by the step of rear microscope base rear end.
9. economical day and night high definition zoom lens according to claim 6, it is characterized in that: the middle surface of contact of described front main cylinder and rear main cylinder is respectively arranged with a square opening position and reference column, and described front cam is provided with to the side of rear cam the stopper slot limiting corresponding microscope base movement travel.
10. the control method of an economical day and night high definition zoom lens, it is characterized in that: the economical day and night high definition zoom lens adopting claim 6, first pass through to rotate front cam, rear cam drives front microscope base respectively, rear microscope base moves, when being adjusted to predetermined focal length, lock front cam, rear cam respectively by front group of nail, rear nail of dialling again, prevent focal length variations.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510739126.5A CN105223680B (en) | 2015-11-04 | 2015-11-04 | Economical day and night high definition zoom lens and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510739126.5A CN105223680B (en) | 2015-11-04 | 2015-11-04 | Economical day and night high definition zoom lens and its control method |
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| CN105223680B CN105223680B (en) | 2017-10-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371195A (en) * | 2016-11-23 | 2017-02-01 | 福建福光股份有限公司 | Large-wide-angle, high-light-flux and high-definition prime lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000356739A (en) * | 1999-06-15 | 2000-12-26 | Asahi Precision Co Ltd | Fish-eye lens system |
| US20060274433A1 (en) * | 2005-06-01 | 2006-12-07 | Kamo Yuji C | Image forming optical system |
| CN102262291A (en) * | 2010-05-26 | 2011-11-30 | Hoya株式会社 | Zoom lens system |
-
2015
- 2015-11-04 CN CN201510739126.5A patent/CN105223680B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000356739A (en) * | 1999-06-15 | 2000-12-26 | Asahi Precision Co Ltd | Fish-eye lens system |
| US20060274433A1 (en) * | 2005-06-01 | 2006-12-07 | Kamo Yuji C | Image forming optical system |
| CN102262291A (en) * | 2010-05-26 | 2011-11-30 | Hoya株式会社 | Zoom lens system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106371195A (en) * | 2016-11-23 | 2017-02-01 | 福建福光股份有限公司 | Large-wide-angle, high-light-flux and high-definition prime lens |
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