CN203422523U - Medium-wave infrared refrigeration type long-focus large-diameter lens - Google Patents
Medium-wave infrared refrigeration type long-focus large-diameter lens Download PDFInfo
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- CN203422523U CN203422523U CN201320468112.0U CN201320468112U CN203422523U CN 203422523 U CN203422523 U CN 203422523U CN 201320468112 U CN201320468112 U CN 201320468112U CN 203422523 U CN203422523 U CN 203422523U
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Abstract
The utility model relates to a medium-wave infrared refrigeration type long-focus large-diameter lens. In the optical system of the lens, a front group A and a rear group B are arranged successively in the incidence direction of light front left to right. The front group A successively comprises a protection plate, a positive lens A-1, a positive lensA-2 and a negative lensA-3. The rear group B successively comprises a positive lens B-1 and a positive lensB-2. The medium-wave infrared refrigeration type long-focus large-diameter lens of the utility model has advantages, such as good imaging quality, good spatial resolution, small size, good vibration resistance and impact resistance, etc.; in the optical structure, the focal power of the front group A and the focal power of the rear group B are distributed reasonably; in the rear group B, two aspheric surfaces are adopted to make the lens reach performance indexes of the long-focus performance index, the large-diameter performance index and simple structure; in the optical design, temperature compensation and distance compensation can be realized through the movement of the positive lens B-1 so as to ensure the using requirements of the lens in high-temperature and low-temperature environments; and the lens can be matched with a medium-wave infrared refrigeration type 320*256, 30 mum detector to perform live recording and tracking tasks.
Description
Technical field
The utility model relates to a kind of medium-wave infrared refrigeration mode long-focus, heavy caliber camera lens for document recording and tracking, belongs to camera lens field.
Background technology
It is far away that infrared imaging has night operating distance; Good in anti-interference performance; Good concealment; Image is directly perceived, is easy to observe; Environment suitability is better than visible ray; Penetrate flue dust, haze ability is strong; Can round-the-clock, round-the-clock work; There is the observation of multiple goal panorama, tracking and target recognition capability and the good advantages such as the stealthy ability of anti-target.Therefore infrared imagery technique becomes a focus of current design development tracker.But infrared photography camera lens in the market, great majority are short-focus lens.Lens focus is short, and bore is little, and the operating distance of system is near, cannot meet the demand of remote observation.Obviously, development heavy caliber, long-focus, the infrared imaging system that operating distance is far away, overcoming above-mentioned defect is research purpose of the present invention.
Utility model content
The purpose of this utility model is to overcome above-mentioned defect, be that the technical problems to be solved in the utility model is to provide a kind of medium-wave infrared refrigeration mode long-focus, heavy caliber camera lens, this camera lens has high imaging quality, high spatial resolution, volume is little, lightweight and the performance of vibration resistance and impact.
In order to solve the problems of the technologies described above; the technical solution of the utility model is: a kind of medium-wave infrared refrigeration mode long-focus, heavy caliber camera lens; in the optical system of described camera lens along light from left to right incident direction be provided with successively front group of A and rear group of B; described front group of A is provided with screening glass, positive lens A-1, positive lens A-2 and negative lens A-3 successively, and described rear group of B is provided with positive lens B-1 and positive lens B-2 successively.
In further technical scheme, the airspace between described front group of A and rear group of B is 253mm.
In further technical scheme, the 4 ° of placements of screening glass inclination in described front group of A.
In further technical scheme; screening glass in described front group of A and the airspace between positive lens A-1 are 3mm; airspace between described positive lens A-1 and positive lens A-2 is 74mm, and the airspace between described positive lens A-2 and negative lens A-3 is 5mm.
In further technical scheme, the positive lens B-1 in described rear group of B and the airspace between positive lens B-2 are 22mm.
Compared with prior art, the utlity model has following beneficial effect: (1) in optical texture, the focal power of front group of A of reasonable distribution and rear group of B; In rear group of B, adopt two aspheric surfaces, make camera lens reach long-focus, heavy caliber, performance index simple and compact for structure; (2) in optical design, by positive lens B-1, move and realize temperature compensation and far and near apart from compensation, guarantee the request for utilization of camera lens under high temperature and low temperature environment; (3) in ray machine design, by 4 ° of placements of screening glass inclination of camera lens front end, to guarantee to eliminate the reflection cool effect that window brings; (4) under the prerequisite of compact conformation, adopt a series of measures guaranteeing, improved the ability of camera lens vibration resistance, impact; (5) body tube threeway adopts integrated design, has good sealing property; In lens construction design, can carry out Rigidity Calculation, suitably increase wall thickness, improve natural frequency, improve the vibration resistance of camera lens, guarantee the request for utilization of system; Meanwhile, each seals position and adopts the sealing of O RunddichtringO, guarantees the sealing property of camera lens.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the optical system schematic diagram of the utility model embodiment.
Fig. 2 is the optical lens structural representation of the utility model embodiment.
Fig. 3 is the cut-open view at A-A place in Fig. 2.
Fig. 4 is the cut-open view at B-B place in Fig. 2.
Fig. 5 is the focusing structure schematic diagram of the utility model embodiment.
Fig. 6 is the one-piece construction front view of the utility model embodiment.
Fig. 7 is the one-piece construction right view of the utility model embodiment.
In figure: 1-Jing Gai, 2-spanner nail, 3-screening glass trim ring, 4-screening glass, 5-AB lens barrel, 6-cone end holding screw, 7-O RunddichtringO, 8-positive lens A-1, 9-O RunddichtringO, 10-B sheet trim ring, arrangement of mirrors cylinder before 11-, 12-positive lens A-2, 13-C sheet trim ring, 14-negative lens A-3, 15-CD lens barrel, 16-D sheet trim ring, 17-O RunddichtringO, 18-hexagon socket cap head screw, 19-body tube, the 20-electric machine assembly of focusing, 21-focusing component, 22-microswitch component, 23-O RunddichtringO, 24-hexagon socket cap head screw, 25-coupling sleeve, 26-hexagon socket cap head screw, 27-O RunddichtringO, 28-O RunddichtringO, 29-hexagon socket cap head screw, 30-valve, 31-F sheet trim ring, 32-O RunddichtringO, 33-positive lens B-1, 34-positive lens B-2, 35-hexagon socket cap head screw, 36-socket or plug, 37-F sheet lens barrel, the 38-movable part of focusing, 39-focusing ring trim ring, 40-cone end holding screw, 41-steel ball, 42-microswitch frame, 43-microswitch retaining screw, 44-microswitch, the 45-guide pin of focusing, 46-focusing ring, the 47-fixture of focusing, 48-E sheet lens barrel, 49-E sheet trim ring, 50-flush end holding screw, 51-camera lens, 52-left and right shrouding, 53-hexagon socket cap head screw, 54-upper sealing plate, 55-thermal imaging system, 56-hexagon socket cap head screw, 57-thermal imaging system is adjusted pad, 58-thermal imaging system fixed mount, 59-thermal imaging system control enclosure, 60-O RunddichtringO, 61-hexagon socket cap head screw, shrouding after 62-, 63-O RunddichtringO, 64-water joint, 65-hexagon socket cap head screw, 66-control enclosure fixed cover nail, 67-fibre-optical splice, 68-fibre-optical splice shrouding, 69-optical fiber boxcar, 70-optical fiber boxcar fixed mount, 71-O RunddichtringO, 72-hexagon socket cap head screw, group before A-, A-1-positive lens, A-2-positive lens, A-3-negative lens, group after B-, B-1-positive lens, B-2-positive lens.
Embodiment
As shown in Figure 1; a kind of medium-wave infrared refrigeration mode long-focus, heavy caliber camera lens; in the optical system of described camera lens along light from left to right incident direction be provided with successively front group of A and rear group of B; described front group of A is provided with screening glass 4, positive lens A-1, positive lens A-2 and negative lens A-3 successively, and described rear group of B is provided with positive lens B-1 and positive lens B-2 successively.
In the present embodiment, along light incident direction, the 4 ° of placements of screening glass 4 inclinations in described front group of A; Airspace between described front group of A and rear group of B is 253mm; Screening glass 4 in described front group of A and the airspace between positive lens A-1 are 3mm, and the airspace between described positive lens A-1 and positive lens A-2 is 74mm, and the airspace between described positive lens A-2 and negative lens A-3 is 5mm; Positive lens B-1 in described rear group of B and the airspace between positive lens B-2 are 22mm.
In the present embodiment, the optical system consisting of above-mentioned lens set has reached following optical index: (1) service band: 3.7 μ m-4.8 μ m; (2) focal length: f '=400mm; (3) detector: medium-wave infrared refrigeration mode 320 * 256,30 μ m; (4) field angle: 1.37 ° * 1.1 °; (5) relative aperture D/ f ': 1/2; (6) optical length ∑ L :≤455mm.
In the present embodiment, in light path design, select two kinds of infra-red materials of silicon and germanium, select the middle once optical texture of image planes, by computer optics assistant software optimal design, be embodied as image quality good.When optical design, choose secondary imaging structure, when guaranteeing to realize 100% cold stop efficiency, reduce the radial dimension of system.Rational initial configuration is optimized to design, and front group of A of optical system is comprised of screening glass 4, positive lens A-1, positive lens A-2 and negative lens A-3, in design, by 4 ° of placements of screening glass 4 inclinations, to guarantee to eliminate the reflection cool effect that window brings; Make positive lens A-2, negative lens A-3 away from positive lens A-1 as far as possible, make its bore as far as possible little, reduce optical weight; Rear group of B is comprised of positive lens B-1, positive lens B-2, in design, at positive lens B-1, positive lens B-2, adopts respectively even aspheric surface, and the structure of optical system is more simplified, and image quality is good.Gentle far and near apart from requiring in order to meet height, system realizes high low temp compensating (-40 ℃ to+60 ℃ temperature) and far and near apart from compensation by mobile positive lens B-1.
As shown in Fig. 2 ~ 4, the structure of described camera lens comprises the body tube 19 for connection lens and transit, described body tube 19 adopts integrated design, the threeway place endoporus of described body tube 19 does not communicate with body tube 19, there is good sealing property and intensity, threeway place of described body tube 19 is provided with for connecting the flange of transit, guarantees processing, debugs convenience.In structural design, can carry out Rigidity Calculation, suitably increase wall thickness, improve natural frequency, thereby improve resistance to shock.
As shown in Fig. 2 ~ 4, the front end of described body tube 19 is connected with front arrangement of mirrors cylinder 11 by flange, guarantees processing, the convenience of debuging, and with the sealing of O RunddichtringO, guarantees sealing property.The front inner wall of described front arrangement of mirrors cylinder 11 is provided with for the AB lens barrel 5 of positive lens A-1 is installed, and the rear inside wall of described front arrangement of mirrors cylinder 11 is provided with for the CD lens barrel 15 of positive lens A-2 and negative lens A-3 is installed.Screening glass 4, positive lens A-1 pack in AB lens barrel 5 by order illustrated, and with screening glass 4 trim rings, B sheet trim ring 10, tighten up respectively.Positive lens A-2, negative lens A-3 pack in CD lens barrel 15 by order illustrated, and with C sheet trim ring 13, D sheet trim ring 16, tighten up respectively.AB lens barrel 5 in the past arrangement of mirrors cylinder 11 is front loaded, and CD lens barrel 15 in the past arrangement of mirrors cylinder 11 rear ends packs into, is conducive to reduce assembly difficulty, improves efficiency of assembling, is convenient to the debugging of camera lens.AB lens barrel 5 and CD lens barrel 15 adopt screw thread to coordinate with front arrangement of mirrors cylinder 11, can effectively guarantee concentricity demand.At screening glass 4 and AB lens barrel 5, AB lens barrel 5, with the cooperation place of front arrangement of mirrors cylinder 11, O RunddichtringO is all installed, guarantees the sealing property of camera lens.Notes shellac is all put at all threaded engagement place, and the method contributes to improve vibration resistance and the impact resistance of optical lens part, improves the anti-seismic performance of whole camera lens.
As shown in Fig. 2 ~ 5, the rear end of described body tube 19 is connected with coupling sleeve 25 by flange, guarantees processing, debugs convenience, and be provided with O type circle, guarantees the sealing of camera lens.The F sheet lens barrel 37 of positive lens B-2 and the rear end of coupling sleeve 25 are installed and adopt flange to be connected, guarantee processing, debug convenience.Positive lens B-2 adopts F sheet trim ring 31 fastening.In F sheet lens barrel 37 and the cooperation place of coupling sleeve 25, positive lens B-2 and F sheet lens barrel 37, O RunddichtringO is all installed, guarantees sealing property.The front inner wall of described coupling sleeve 25 is provided with for the motor rack of focusing electric machine assembly 20, mistake wheel assembly and potentiometer assembly is installed, the internal flange of described coupling sleeve 25 is provided with the focusing component 21 for focusing, and described focusing component 21 is provided with for the E sheet lens barrel 48 of positive lens B-1 is installed.
As shown in Figure 5, focusing component 21 comprises focusing fixture 47, focusing movable part 38, focusing ring 46 and focusing ring gear etc.Focusing fixture 47 is connected with coupling sleeve 25 by flange, guarantees processing, debugs convenience.Focusing ring 46 is arranged on focusing fixture 47 by front and back accurate steel balls 41, and compresses with focusing ring trim ring 39, and the sliding friction of focusing ring 46 is changed into rolling friction, the friction force while moving to reduce focusing.The third wheel of crossing wheel assembly is meshed with the focusing ring gear of the focusing motor gear of electric machine assembly 20, the precision resistor gear of potentiometer assembly and focusing component 21 respectively, when rotor is done positive and negative rotatablely moving, motor gear drives precision resistor gear and the engagement of focusing ring gear to rotate by third wheel, makes precision resistor and focusing ring 46 synchronous rotaries.By suitable sample circuit, take out the changing value of potentiometer, thereby control the anglec of rotation of focusing ring 46, realize the control of focusing amount.On focusing ring 46, join and be drilled with a microswitch retaining screw 43, rotation by focusing ring 46 makes microswitch retaining screw 43 pines, presses the microswitch 44 of two distribution certain angles, thereby the mechanical position limitation of realizing focusing, makes focusing system have electric stop means and mechanical stop limiter.Third wheel drives focusing ring 46 to do forward and reverse motion by engagement, focusing ring 46 drives focusing movable part 38 by the acme thread being connected with focusing movable part 38, and under the effect of three uniform guide pins, make forward and reverse rectilinear motion, thereby drive E sheet lens barrel 48 to make forward and reverse rectilinear motion, realize the object of system focusing.
As shown in Fig. 6 ~ 7, the rear end of described coupling sleeve is also provided with for the thermal imaging system fixed mount 58 of thermal imaging system 55, optical fiber boxcar 69 and thermal imaging system control enclosure 59 is installed, and thermal imaging system 55, thermal imaging system control enclosure 59, water joint 64, optical fiber boxcar 69, optical fiber boxcar fixed mount 70, fibre-optical splice 67, fibre-optical splice shrouding 68, upper sealing plate 54, left and right shrouding 52 and rear shrouding 62 are connected into an integral body by thermal imaging system fixed mount 58 and camera lens 51.At camera lens 51, upper sealing plate 54, left and right shrouding 52, rear shrouding 62, water joint 64, fibre-optical splice shrouding 68, be equipped with O-ring seal with the junction of thermal imaging system fixed mount 58, guarantee the watertightness performance of camera lens integral body.For convenience of processing, control enclosure fixed cover nail 66 is made in the retaining thread hole of thermal imaging system control enclosure 59, and control enclosure fixed cover is followed closely 66 screw thread places and is coated with screw thread glue, guarantees to be connected firmly and seal request.Attachment screw between each mechanical component is all furnished with standard spring washer retaining simultaneously, and notes shellac is all put at attachment screw place, guarantees the direct coupled fixing of part, improves vibration resistance and the impact property of camera lens integral body.
The foregoing is only preferred embodiment of the present utility model, all equalizations of doing according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (9)
1. a medium-wave infrared refrigeration mode long-focus, heavy caliber camera lens; it is characterized in that: in the optical system of described camera lens along light from left to right incident direction be provided with successively front group of A and rear group of B; described front group of A is provided with screening glass, positive lens A-1, positive lens A-2 and negative lens A-3 successively, and described rear group of B is provided with positive lens B-1 and positive lens B-2 successively.
2. medium-wave infrared refrigeration mode long-focus according to claim 1, heavy caliber camera lens, is characterized in that: the airspace between described front group of A and rear group of B is 253mm.
3. medium-wave infrared refrigeration mode long-focus according to claim 1 and 2, heavy caliber camera lens, is characterized in that: the 4 ° of placements of screening glass inclination in described front group of A.
4. medium-wave infrared refrigeration mode long-focus according to claim 1 and 2, heavy caliber camera lens; it is characterized in that: the screening glass in described front group of A and the airspace between positive lens A-1 are 3mm; airspace between described positive lens A-1 and positive lens A-2 is 74mm, and the airspace between described positive lens A-2 and negative lens A-3 is 5mm.
5. medium-wave infrared refrigeration mode long-focus according to claim 1 and 2, heavy caliber camera lens, is characterized in that: the positive lens B-1 in described rear group of B and the airspace between positive lens B-2 are 22mm.
6. medium-wave infrared refrigeration mode long-focus according to claim 1, heavy caliber camera lens, is characterized in that: the structure of described camera lens comprises the body tube for connection lens and transit, and threeway place of described body tube is provided with for connecting the flange of transit.
7. medium-wave infrared refrigeration mode long-focus according to claim 6, heavy caliber camera lens, it is characterized in that: the front end of described body tube is connected with front arrangement of mirrors cylinder by flange, the front inner wall of described front arrangement of mirrors cylinder is provided with for the AB lens barrel of positive lens A-1 is installed, and the rear inside wall of described front arrangement of mirrors cylinder is provided with for the CD lens barrel of positive lens A-2 and negative lens A-3 is installed.
8. medium-wave infrared refrigeration mode long-focus according to claim 6, heavy caliber camera lens, it is characterized in that: the rear end of described body tube is connected with coupling sleeve by flange, the front inner wall of described coupling sleeve is provided with for focusing electric machine assembly is installed, cross the motor rack of wheel assembly and potentiometer assembly, the internal flange of described coupling sleeve is provided with the focusing component for focusing, the rear end of described coupling sleeve is provided with for the F sheet lens barrel of positive lens B-2 is installed, the rear end of described coupling sleeve is also provided with for thermal imaging system is installed, the thermal imaging system fixed mount of optical fiber boxcar and thermal imaging system control enclosure.
9. medium-wave infrared refrigeration mode long-focus according to claim 8, heavy caliber camera lens, is characterized in that: described focusing component is provided with for the E sheet lens barrel of positive lens B-1 is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320468112.0U CN203422523U (en) | 2013-08-02 | 2013-08-02 | Medium-wave infrared refrigeration type long-focus large-diameter lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320468112.0U CN203422523U (en) | 2013-08-02 | 2013-08-02 | Medium-wave infrared refrigeration type long-focus large-diameter lens |
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| CN203422523U true CN203422523U (en) | 2014-02-05 |
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| CN201320468112.0U Expired - Fee Related CN203422523U (en) | 2013-08-02 | 2013-08-02 | Medium-wave infrared refrigeration type long-focus large-diameter lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364932A (en) * | 2013-08-02 | 2013-10-23 | 福建福光数码科技有限公司 | Medium-wave infrared refrigerated lens with long focal length and large aperture |
| CN106101564A (en) * | 2016-08-16 | 2016-11-09 | 葛瑞坤 | A kind of electronic focus tracking and focusing range thereof are from determining method |
-
2013
- 2013-08-02 CN CN201320468112.0U patent/CN203422523U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364932A (en) * | 2013-08-02 | 2013-10-23 | 福建福光数码科技有限公司 | Medium-wave infrared refrigerated lens with long focal length and large aperture |
| CN106101564A (en) * | 2016-08-16 | 2016-11-09 | 葛瑞坤 | A kind of electronic focus tracking and focusing range thereof are from determining method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: FUJIAN FORECAM CO., LTD. Free format text: FORMER NAME: FUJIAN FORECAM DIGITAL TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Patentee after: FUJIAN FORECAM CO., LTD. Address before: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Patentee before: Fujian Forecam Optics Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20150802 |
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| EXPY | Termination of patent right or utility model |