CN102902045A - Pick-up lens for high-resolution single group movement industry - Google Patents
Pick-up lens for high-resolution single group movement industry Download PDFInfo
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- CN102902045A CN102902045A CN2012104231059A CN201210423105A CN102902045A CN 102902045 A CN102902045 A CN 102902045A CN 2012104231059 A CN2012104231059 A CN 2012104231059A CN 201210423105 A CN201210423105 A CN 201210423105A CN 102902045 A CN102902045 A CN 102902045A
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Abstract
The invention relates to a pick-up lens for a high-resolution single group movement industry. A front group A with negative focal power, an iris diaphragm C and a rear group B with positive focal power are sequentially arranged in an optical system of the lens along the incident direction from left to right of light, wherein the front group A is sequentially provided with a positive meniscus lens A-1, a positive meniscus lens A-2 and a negative meniscus lens A-3, and the rear group B is sequentially provided with a glued group with tight joint of a biconcave lens B-1 and a biconvex lens B-2, a biconvex lens B-3 and a positive meniscus lens B-4. The pick-up lens disclosed by the invention has the characteristics of high resolution, large target surface, low distortion, small minimum photographic distance and the like, and can be in adaptation with a high-resolution CCD (charge coupled device) or a CMOS (complementary metal oxide semiconductor) video camera, realize high-resolution videography, simultaneously realize clear imaging with minimum photographic distance of 0.3m and enable the distortion to be lower than 1%.
Description
Technical field
The present invention relates to the single group of a kind of high resolving power mobile industrial pick-up lens.
Background technology
Improving constantly of constantly perfect, various circles of society's awareness of safety of science and technology promoting the fast development in security protection market.Along with advanced person's technology of video compressing encoding is constantly ripe, the develop rapidly of IP-based Internet Transmission has released a series of 3,000,000,5,000,000 even the high-definition camera of higher pixel on the market.Constantly perfect along with 1,000,000 grades of pixel high-resolution CCD, cmos image sensor, the photo electric video frequency monitoring networking is also more and more general, the performance of video camera system by in the past to external world pure " the watching " of scenery to now " identification and cognitive ", having again the sharpness of video in the process owing to Internet Transmission and Digital Zoom is the shortcoming that resolution descends, and people are more and more higher to the requirement of image analytic degree, require to have more high-resolution camera lens.Early stage tight shot is simple in structure, performance index are low, can only be adaptive with SD CCD or the cmos camera of 20 ~ 300,000 pixels on the sharpness of image, shooting effect is general, picture is worth little, can only adapt to the needs that the monitoring field " is seen ", such resolution has not satisfied the requirement of present high-definition camera far away.
The congruence of pursuing with rig camera, critical component as the monitoring image collection, manufacturer also develops new technology when promoting the camera lens quality, such as the birth of aspherical lens, the popularization of infrared lens, the rise of the corresponding camera lens of mega pixel etc., its target only has one: improving image definition, improve image quality.Better picture quality, higher sharpness is not only the keyword of each camera lens producer requirement technology in 2012, and what the camera lens product was eternal especially pursues a goal.
Summary of the invention
The problem that the present invention is directed to above-mentioned prior art existence makes improvements, be that the technical problem to be solved in the present invention provides the single group of the higher high resolving power of a kind of resolution mobile industrial pick-up lens, for video camera system provides the high definition camera lens that a kind of optical index is high, the optics target surface large, resolution is higher than five mega pixels, can " video camera of high definition supports the use; video camera system can be realized the requirement of scenery at the high definition pick-up of high photokinesis variation range environment, and almost not distortion with 16:9 standard 2/3.
In order to solve the problems of the technologies described above, technical scheme of the present invention is: the single group of a kind of high resolving power mobile industrial pick-up lens, in the optical system of described camera lens along light from left to right incident direction to be disposed with focal power be rear group of positive B for negative front group of A, iris C and focal power, described front group of A is disposed with positive crescent moon lens A-1, positive crescent moon lens A-2 and negative crescent moon lens A-3, and described rear group of B is disposed with the gummed group, biconvex lens B-3 and the positive crescent moon lens B-4 that are connected airtight by biconcave lens B-1 and biconvex lens B-2 and forms.
In technique scheme, the single group of this high resolving power mobile industrial adopts the optical texture of retrofocus type with pick-up lens, described rear group of B changes the first eyeglass into the cemented doublet group on the prototype of traditional three-chip type structure, to share the focal power of rear group of B, improved the relative aperture of camera lens; Utilize gummed to organize the refractive index of positive and negative eyeglass and the difference of dispersion, the aberration of corrective lens, make resolution of lens up to 5,000,000, distortion is less than 1%.
Compared with prior art, the present invention has the following advantages.
(1) in the optical texture of this retrofocus type reasonable distribution the focal power of front group and rear group, the first eyeglass the three-chip type structure in rear group changes the cemented doublet group into, makes camera lens reach object lens of large relative aperture, wide-angle, the short performance index of structure length; And the independent mobile function of focusing that realizes of group after this camera lens adopts has had very large novelty with respect in the past common lens at light channel structure.
(2) by the optical glass material of forward and backward two groups of seven eyeglasses of reasonable selection, select the optical glass material (such as the H-FK61 optical material) of high index of refraction, low dispersion as far as possible; By area of computer aided optical design and optimization, proofreaied and correct the various aberrations of optical lens perfectly, make the mtf value of camera lens at 150lp/mm, make the resolution of camera lens high, can adapt to the requirement of the high definition video shooting of 5,000,000 pixels.
(3) distortion of this optical system is less, and below 1%, and the distortion of common lens all can be larger, and this optical system has had better control with respect to old structural aberration; The asterism figure of this optical system is also more satisfactory, and all in 3.5 um, energy comparison is concentrated, and has reached high-resolution requirement.
(4) this optical system is by design optimization, and close-shot can realize blur-free imaging apart from reaching 0.3m in nearer object distance with respect to common telephoto lens, and this also is a large advantage of industrial lens.
(5) when structural design, both guaranteed camera lens concentricity, precision and axial location accurately, make again the compact conformation, attractive in appearance of camera lens as far as possible; Consider again the practicality of camera lens, adopted front end little " focusing " structure, avoided the limit of camera lens to use; Design simultaneously different spacer rings and trim ring and fixed eyeglass, guaranteed the airspace between eyeglass, thereby reached the high picture element of camera lens, low distortion.
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the index path of the embodiment of the invention.
Fig. 2 is the structural drawing of the embodiment of the invention.
Among the figure: group before the A-, organize the C-iris behind the B-, A-1, A-2, the positive crescent moon lens of B-4-, A-3-bears crescent moon lens, B-1-biconcave lens, B-2, trim ring before the B-3-biconvex lens, 1-, 2-the first spacer ring, the positive crescent moon lens of 3-A-1, the positive crescent moon lens of 4-A-2,5-bears crescent moon lens A-3, arrangement of mirrors cylinder jackscrew before the arrangement of mirrors cylinder before the 6-, 7-, the 8-focusing ring, 9-roll adjustment seat, 10-cone end jackscrew, 11-transition piece locking nail, the 12-transition piece, nail is dialled on 13-light hurdle, 14-light hurdle regulating ring, 15-Connection Block jackscrew, 16-Connection Block, 17-limiting steering sheet, arrangement of mirrors cylinder behind the 18-, 19-biconcave lens B-1,20-biconvex lens B-2,21-biconvex lens B-3, the positive crescent moon lens of 22-B-4, trim ring behind the 23-, 24-countersunk head nail, 25-the second spacer ring, 26-light hurdle locking nail, 27-light hurdle rivet, 28-light hurdle rotating ring, 29-light hurdle snap ring.
Embodiment
As shown in Figure 1, light path design of the present invention is as follows: the single group of a kind of high resolving power mobile industrial pick-up lens, in the optical system of described camera lens along light from left to right incident direction to be disposed with focal power be rear group of positive B for negative front group of A, iris C and focal power, described front group of A is disposed with positive crescent moon lens A-1, positive crescent moon lens A-2 and negative crescent moon lens A-3, and described rear group of B is disposed with the gummed group, biconvex lens B-3 and the positive crescent moon lens B-4 that are connected airtight by biconcave lens B-1 and biconvex lens B-2 and forms.
In the present embodiment, the airspace between described front group of A and the rear group of B is 4.9179mm, and the airspace between described front group of A and the iris C is 2.5105mm, and the airspace between described iris C and the rear group of B is 2.4074mm; Airspace between positive crescent moon lens A-1 among the described front group of A and the positive crescent moon lens A-2 is 0.1474mm, and the airspace between described positive crescent moon lens A-2 and the negative crescent moon lens A-3 is 0.3586mm; Gummed group and the airspace between the biconvex lens B-3 among the described rear group of B are 0.1188mm, and described biconvex lens B-3 is 0.6120mm with the airspace of positive crescent moon lens B-4.
In the present embodiment, the single group of this high resolving power mobile industrial has been realized following technical indicator with pick-up lens: (1) focal length: f '=35mm; (2) relative aperture: D/f '=1/1.8; (3) field angle: 2 ω=18 °; (4) resolution: be better than 5,000,000 pixels; (5) light path overall length ∑≤50.5mm; (6) applicable spectral line scope: 400nm ~ 700nm.
The resolution of this camera lens is 5,000,000 pixels, and the resolution of this type of lens edge visual field and central market will be consistent as far as possible, and this just requires will to guarantee in the structural design the accurate, steady etc. of the actions such as the concentricity of each constituent element of system and focusing.
As shown in Figure 2, Design of Mechanical Structure of the present invention is as follows: described front group of A is installed in the front arrangement of mirrors cylinder 6, can effectively be guaranteed the concentricity of front group of light path by the front arrangement of mirrors cylinder 6 of same machine tooling; In described front arrangement of mirrors cylinder 6 front ends front trim ring of pushing down positive crescent moon lens A-1 is installed, the Assembly stability of arrangement of mirrors sheet before guaranteeing, and interception parasitic light are eliminated it to the impact of lens imaging quality; Be provided with the first spacer ring between described positive crescent moon lens A-1 and the positive crescent moon lens A-2, guarantee the airspace between each eyeglass; Described rear group of B is installed in the rear arrangement of mirrors cylinder 18, and described rear arrangement of mirrors cylinder is equipped with the rear trim ring of pushing down positive crescent moon lens B-4 in 18 rear ends, and arrangement of mirrors sheet assembling stability after guaranteeing prevents that eyeglass is loosening or drops out; Be provided with the second spacer ring between described gummed group and the biconvex lens B-3, guarantee the airspace between each eyeglass.
In order to realize the function of manual iris, described rear arrangement of mirrors cylinder 18 is provided with the adjusting aperture governor motion for iris C, described iris C is the middle light hurdle rotating ring 28 that is fixed with some light hurdle sheets, described smooth hurdle sheet is after light hurdle rivet 27 is connected on the arrangement of mirrors cylinder 18, described aperture governor motion comprises light hurdle rotating ring 28 is fixed on light hurdle snap ring 29 on the rear arrangement of mirrors cylinder 18, nail 13 is dialled on the light hurdle of light hurdle regulating ring 14 and connection light hurdle rotating ring 28 and light hurdle regulating ring 14, just offer with the light hurdle at light hurdle regulating ring 14 and to dial nail 13 holes that cooperate, described smooth hurdle is dialled nail 13 and is just withstood again light hurdle rotating ring 28, make it possible to drive by regulating light hurdle regulating ring 14 running of light hurdle sheet, offer the groove of certain angle in the described rear arrangement of mirrors cylinder 18 with the size of control light hurdle opening, to satisfy the environment for use under the different illumination conditions.Can do the garland processing at light hurdle regulating ring 14, make it when manual operation, increase friction force between hand and part, also improve the aesthetic property of camera lens outward appearance simultaneously.
In order to realize the function of manual focusing, described rear arrangement of mirrors cylinder 18 is provided with the fine setting focusing mechanism, described fine setting focusing mechanism comprises roll adjustment seat 9 and focusing ring 8, described focusing ring 8 is connected so that the circumferential movement of roll adjustment seat 9 becomes the rectilinear motion along axis with roll adjustment seat 9 through several cone end jackscrews 10, described roll adjustment seat 9 outsides are connected with transition piece 12, described roll adjustment seat 9 respectively through positive and negative pitch thread with after arrangement of mirrors cylinder 18 be connected with transition piece 12, described transition piece 12 is fixed on the roll adjustment seat 9 through transition piece locking nail 11, described front arrangement of mirrors cylinder 6 is fixed on transition piece 12 through several front arrangement of mirrors cylinder jackscrews 7, and described smooth hurdle regulating ring 14 is fixed on the transition piece 12 through light hurdle locking nail 26.When external force is rotated focusing ring 8, drive roll adjustment seat 9 and rotate towards a direction, the respectively in the opposite direction motion of the transition piece 12 that be connected with its positive and negative tooth this moment and rear arrangement of mirrors cylinder 18.Whole part drives roll adjustment seat 9 by regulating focusing ring 8, arrangement of mirrors cylinder 18 after described roll adjustment seat 9 drives, thereby arrangement of mirrors cylinder 18 integral body moving relative between front arrangement of mirrors cylinder 6 and imaging target surface after realizing, this also is that this nested structure moves different place with respect to whole group of lens barrel.In the assembling of fine setting focusing mechanism, by grinding, the precision that cooperates between the assurance screw thread improves the precision of focusing, thereby guarantees the concentricity of camera lens in the focusing process.
In order to prevent that whole light path from occuring along the rotatablely moving of optical axis, be provided with limiting steering sheet 17 between described transition piece 12 and the rear arrangement of mirrors cylinder 18 changing the direction of rear arrangement of mirrors cylinder 18 motions, described limiting steering sheet 17 is after countersunk head nail 24 is fixed on the arrangement of mirrors cylinder 18.
Consider the practicality of industrial lens, in order to indicate more intuitively close-shot apart from the change procedure to the infinite distance, on transition piece 12, indicated the corresponding focal length of diverse location by accurate technology, also mark simultaneously out relative aperture value corresponding to different aperture position, all done corresponding anchor point at focusing ring 8 with above the light hurdle regulating ring 14, so that check.
Dock with video camera for the ease of camera lens, described transition piece 12 is connected with the Connection Block 16 that is fixedly linked with the video camera corresponding interface, described Connection Block 16 is fixed on the transition piece 12 through several Connection Block jackscrews 15, thereby also define the motion of transition piece 12, again because front arrangement of mirrors cylinder 6 is fixing by transition piece 12, thereby front arrangement of mirrors cylinder 6 is constant with respect to camera position also.
Because the resolution of this camera lens is very high, and the resolution of visual field, edge and central market do not allow very large difference, thus in structural design mainly be the actions such as the concentricity of each constituent element of assurance system and focusing accurately, steady and good hand touch.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to the present patent application claim change and modify, and all should belong to covering scope of the present invention.
Claims (9)
1. a high resolving power list is organized the mobile industrial pick-up lens, it is characterized in that: in the optical system of described camera lens along light from left to right incident direction to be disposed with focal power be rear group of positive B for negative front group of A, iris C and focal power, described front group of A is disposed with positive crescent moon lens A-1, positive crescent moon lens A-2 and negative crescent moon lens A-3, and described rear group of B is disposed with the gummed group, biconvex lens B-3 and the positive crescent moon lens B-4 that are connected airtight by biconcave lens B-1 and biconvex lens B-2 and forms.
2. high resolving power list according to claim 1 is organized the mobile industrial pick-up lens, it is characterized in that: the airspace between described front group of A and the rear group of B is 4.9179mm, airspace between described front group of A and the iris C is 2.5105mm, and the airspace between described iris C and the rear group of B is 2.4074mm.
3. high resolving power list according to claim 1 and 2 is organized the mobile industrial pick-up lens, it is characterized in that: the airspace between the positive crescent moon lens A-1 among the described front group of A and the positive crescent moon lens A-2 is 0.1474mm, and the airspace between described positive crescent moon lens A-2 and the negative crescent moon lens A-3 is 0.3586mm.
4. high resolving power list according to claim 1 and 2 is organized the mobile industrial pick-up lens, it is characterized in that: gummed group and the airspace between the biconvex lens B-3 among the described rear group of B are 0.1188mm, and described biconvex lens B-3 is 0.6120mm with the airspace of positive crescent moon lens B-4.
5. high resolving power list according to claim 1 is organized the mobile industrial pick-up lens, it is characterized in that: described front group of A is installed in the front arrangement of mirrors cylinder, in the described front arrangement of mirrors cylinder front end the front trim ring of pushing down positive crescent moon lens A-1 is installed, is provided with the first spacer ring between described positive crescent moon lens A-1 and the positive crescent moon lens A-2; Described rear group of B is installed in the rear arrangement of mirrors cylinder, in the described rear arrangement of mirrors tube rear end the rear trim ring of pushing down positive crescent moon lens B-4 is installed, and is provided with the second spacer ring between described gummed group and the biconvex lens B-3.
6. high resolving power list according to claim 5 is organized the mobile industrial pick-up lens, it is characterized in that: described rear arrangement of mirrors cylinder is provided with the adjusting aperture governor motion for iris C, described iris C is the middle light hurdle rotating ring that is fixed with some light hurdle sheets, described smooth hurdle sheet is after light hurdle rivet is fixed on the arrangement of mirrors cylinder, described aperture governor motion comprises light hurdle rotating ring is fixed on light hurdle snap ring on the rear arrangement of mirrors cylinder, nail is dialled on the light hurdle of light hurdle regulating ring and connection light hurdle rotating ring and light hurdle regulating ring, offers the groove of control light hurdle openings of sizes in the described rear arrangement of mirrors cylinder.
7. high resolving power list according to claim 6 is organized the mobile industrial pick-up lens, it is characterized in that: described rear arrangement of mirrors cylinder is provided with the fine setting focusing mechanism, described fine setting focusing mechanism comprises roll adjustment seat and focusing ring, described focusing ring is fixedly connected with the roll adjustment seat through several cone end jackscrews, the described roll adjustment seat outside is connected with transition piece, described roll adjustment seat respectively through positive and negative pitch thread with after the arrangement of mirrors cylinder be connected with transition piece, described transition piece is fixed on the roll adjustment seat through the transition piece locking nail, described front arrangement of mirrors cylinder is fixed on transition piece through several front arrangement of mirrors cylinder jackscrews, and described smooth hurdle regulating ring is fixed on the transition piece through light hurdle locking nail.
8. the single group of high resolving power according to claim 7 mobile industrial pick-up lens is characterized in that: be provided with the limiting steering sheet between described transition piece and the rear arrangement of mirrors cylinder, described limiting steering sheet through countersunk head follow closely be fixed in after on the arrangement of mirrors cylinder.
9. high resolving power list according to claim 7 is organized the mobile industrial pick-up lens, and it is characterized in that: described transition piece is connected with Connection Block, and described Connection Block is fixed on the transition piece through several Connection Block jackscrews.
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Cited By (4)
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CN106501923A (en) * | 2016-12-19 | 2017-03-15 | 福建福光光电科技有限公司 | High-resolution whole group mobile industrial pick-up lenss |
CN107589525A (en) * | 2017-09-29 | 2018-01-16 | 福建福光股份有限公司 | Microminiature lens of star sensor |
CN108181697A (en) * | 2016-12-08 | 2018-06-19 | 日本电产三协株式会社 | Lens unit and photographic device |
CN108646377A (en) * | 2018-07-17 | 2018-10-12 | 福州锐景达光电科技有限公司 | Improve the device and method of high definition zoom lens dress school efficiency and image quality |
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CN108646377A (en) * | 2018-07-17 | 2018-10-12 | 福州锐景达光电科技有限公司 | Improve the device and method of high definition zoom lens dress school efficiency and image quality |
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