CN101930112A - Medium-wave infrared scouting and tracking lens - Google Patents
Medium-wave infrared scouting and tracking lens Download PDFInfo
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- CN101930112A CN101930112A CN 201010176700 CN201010176700A CN101930112A CN 101930112 A CN101930112 A CN 101930112A CN 201010176700 CN201010176700 CN 201010176700 CN 201010176700 A CN201010176700 A CN 201010176700A CN 101930112 A CN101930112 A CN 101930112A
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- lens
- coupling tunnel
- medium
- dewar flask
- eyeglass
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Abstract
The invention relates to a medium-wave infrared scouting and tracking lens, which is characterized in that: a front group I and a back group II, both of which have positive focal power, are arranged in an optical path structure along the left-to-right incident direction of a light beam; the front group I is provided with a double convex lens I-A, a double concave lens I-B and a positive crescent lens I-C in turn; and the back group II is provided with a positive crescent lens II-A, a negative crescent lens II-B and a positive crescent lens II-C in turn. In the invention, the drawback of the long-distance target observation and tracking of a CCD visible light photographing technique is overcome, a total refraction type medium-wave infrared lens with long focal length, large angle of view field, large relative aperture and large adaptive temperature change range is provided, the lens can change the irradiated infrared rays of a long-distance target into a clear image or video and realize the observation, scouting and tracking of the long-distance target in 24 hours and in all kinds of weather.
Description
Technical field
The present invention relates to a kind of camera lens, design a kind of long-focus, big field angle, object lens of large relative aperture, medium-wave infrared scouting and tracking lens that the adaptive temperature variation range is big especially.
Background technology
Up to now, still adopt CCD visible image capturing technology that distant object is observed, scouted and follows the tracks of at photoelectric field, although under good illumination and weather condition, its imaging resolution can satisfy the requirement of routine observation and tracking, but it is limited by ambient light illumination condition, weather condition.Especially under adverse weather conditions such as night, haze weather, the video image that is produced can't satisfy the requirement of monitoring and tracking.It can not satisfy needs round-the-clock, that round-the-clock is scouted, followed the tracks of distant object.
Summary of the invention
The object of the present invention is to provide a kind of medium-wave infrared scouting and tracking lens, this camera lens overcomes with CCD visible image capturing technology observes the defective of following the tracks of existence to distant object, it is the medium wave infrared lens of the long-focus of all-refraction type, big field angle, object lens of large relative aperture and adaptive temperature variation range, this camera lens can change the infrared radiation of distant object into distinct image or video, realizes that round-the-clock round-the-clock observes, scouts and follow the tracks of distant object.
Technical program of the present invention lies in: a kind of medium-wave infrared scouting and tracking lens, it is characterized in that: in its light channel structure along light from left to right direction incident be provided with focal power and be positive preceding group of I and back group II, described before the group I be provided with biconvex eyeglass I-A, concave-concave eyeglass I-B, first month of the lunar year odontoscope sheet I-C successively; Described back group II be provided with successively odontoscope sheet II-A in the first month of the lunar year, negative crescent moon eyeglass II-B and the first month of the lunar year odontoscope sheet II-C.
The invention has the advantages that: 1, to have field angle big for this camera lens, and operating distance is far away, and good in anti-interference performance penetrates flue dust, the fog ability is strong;
2, can round-the-clock, round-the-clock work;
3, adopt the self-regulating heat radiation receiver, the exit pupil position of infrared optical lens and image planes position are not drifted about because of temperature variation, make total system under the temperature difference environment of broad, stable serviceability be arranged all.
Description of drawings
Fig. 1 is a light channel structure synoptic diagram of the present invention.
Fig. 2 is the assembling synoptic diagram of camera lens of the present invention and self-regulating heat radiation receiver.
Embodiment
A kind of medium-wave infrared scouting and tracking lens, it is characterized in that: in its light channel structure along light from left to right direction incident be provided with focal power and be positive preceding group of I and back group II, described before the group I be provided with biconvex eyeglass I-A, concave-concave eyeglass I-B, first month of the lunar year odontoscope sheet I-C successively; Described back group II be provided with successively odontoscope sheet II-A in the first month of the lunar year, negative crescent moon eyeglass II-B and the first month of the lunar year odontoscope sheet II-C.
Wherein, along the light incident direction, the airspace in preceding group of I between biconvex eyeglass I-A and the concave-concave eyeglass I-B is 1.82mm; Airspace between concave-concave eyeglass I-B and the first month of the lunar year odontoscope sheet I-C is 0.47mm, in the group II of back the first month of the lunar year odontoscope sheet II-A and negative crescent moon eyeglass II-B between the airspace be 2.2mm; Airspace between negative crescent moon eyeglass II-B and the first month of the lunar year odontoscope sheet II-C is 0.48mm.
Have above-mentioned infrared lens device can reach following parameter:
1) focal distance f '=150mm;
2) field angle 2 ω 〉=4.5 ° (target surface size φ 12mm of detector);
3) relative aperture: D/f ' 〉=1/2.5;
4) adapt to infrared spectrum: 3 ~ 5 μ;
5) resolution: during optical transfer function 17lp/mm, point: MTF 〉=0.7 on the axle
0.7ω?MTF≥0.5；
6) working temperature :-40 ℃ ~ 60 ℃.
Make the exit pupil position of infrared optical lens with reference to figure 2, the image planes position does not drift about because of variation of ambient temperature, make camera lens under the temperature difference environment of broad, stable performance be arranged all, described camera lens rear side is provided with the self-regulating heat radiation receiver, described self-regulating heat radiation receiver comprises main tube coupling tunnel 1, be sheathed on main tube and connect the interior coupling tunnel 2 of cylindrical shell, be sheathed on to connect the Dewar flask coupling tunnel 3 in the cylindrical shell and be sheathed on Dewar flask and connect the interior Dewar flask 4 of cylindrical shell, the front side of described main tube coupling tunnel achieves a fixed connection through the rear side of bolt 5 with camera lens master tube 6, the rear side of main tube coupling tunnel achieves a fixed connection through bolt 7 and the coupling tunnel of being located in its body, the Dewar flask coupling tunnel of the front side of described coupling tunnel in bolt and 8 is located at its body achieves a fixed connection, the rear side of described Dewar flask coupling tunnel achieves a fixed connection through bolt 9 and the Dewar flask of being located in its body, is provided with cold light hurdle 10 and infrared eye target surface 11 in the Dewar flask and on the center line of light shaft coaxle from left to right successively.
Since the infrared reconnaissance tracker will be in-40 ℃ ~ 60 ℃ temperature environment operate as normal, and the temperature variant dn/dt value of the refractive index of most of infra-red materials is bigger, along with variation of temperature, the significant image planes drift of the unavoidable generation of system makes the emergent pupil of infrared lens and Dewar cold shield cover position produce drift.The dewar window of its emergent pupil and detector front end can't be rabbeted fully, and drift also will appear in the image planes of camera lens and the target surface of pyroscan, cause the picture quality of pyroscan seriously to descend, even can make pyroscan not receive image.
Being provided with the self-regulating heat radiation receiver can eliminate the influence of temperature to image quality from two aspects:
The first, use expansion coefficient in cold light hurdle is the manufacturing of 1.76 * 10-6 alloy material, when 60 ℃ of temperature difference, diameter is that φ 16mm cold light hurdle variable in distance is 1.69 μ m, therefore its variation can think that the distance on cold light hurdle and the variation of target surface in-40 ℃ ~ 60 ℃ scopes do not influence image quality much smaller than this camera lens depth of focus=40 μ m.
The second, with computing machine auxiliary optical design software, calculate this camera lens under different temperatures optical interval and a last eyeglass to the distance between the cold light hurdle, can draw the side-play amount of infrared eye target surface and camera lens target surface, i.e. rear cut-off distance changes delta x ', result of calculation is as shown in Table 1.
Each eyeglass of table one medium wave infrared lens under different temperatures is (mm of unit) at interval
As can be known, when-40 ℃ of low temperature, rear cut-off distance has departed from 0.547mm from table one, and promptly infrared eye target surface and camera lens target surface depart from 0.547mm, and infrared eye has not received distinct image.
As shown in Figure 2, the target surface that will hold infrared eye and the self-regulating heat radiation receiver on cold light hurdle are with after camera lens is connected, when temperature variation, because main tube coupling tunnel, coupling tunnel, Dewar flask coupling tunnel adopt the material of different expansion coefficient to make and be provided with when mounted different distances respectively with Dewar flask, can produce different length variations, establish variable quantity and be respectively Δ x
1, Δ x
2, Δ x
3, Δ x
4, then infrared eye target surface axial location with the variation of temperature amount be Δ x ' '=-Δ x
1+ Δ x
2-Δ x
3+ Δ x
4, concrete numerical value is referring to table two.
Table two is various materials and infrared eye target surface changing value (mm of unit) under different temperatures
From the result of table one, table two as can be known, when temperature changes, adopt that infrared eye target surface and camera lens target surface depart from Δ x=Δ x ' '-Δ x ' behind the self-regulating heat radiation receiver.
Then temperature is in the time of 60 ℃, 40 ℃, 20 ℃, 0 ℃ ,-20 ℃ ,-40 ℃, and Δ x variable quantity is:
-0.0218 ,-0.0104,0,0.0054,0.0158 ,-0.0328,From the variation of above target surface as can be known, change maximumly when temperature is-40 ℃, be-0.0328mm, less than the depth of focus 40 μ m of this camera lens, so this camera lens can satisfy when the variation of temperature in-40 ℃ ~ 60 ℃ scopes and not influence image quality.
Pairing each coupling tunnel and Dewar flask adopt following length and material to make in the above-mentioned table:
Main tube coupling tunnel adopts low alloy steel to make, and expansion coefficient is 8.31 * 10
-6, its length is L
1=83mm;
Coupling tunnel adopts nonmetallic materials to make, and expansion coefficient is 130 * 10
-6, its length is L
2=72mm;
The Dewar flask coupling tunnel adopts low alloy steel to make, and expansion coefficient is 8.31 * 10
-6, its length is L
3=60mm;
Dewar flask adopts glass to make, and expansion coefficient is 7.5 * 10
-6, its coupling part length is 53mm.
This camera lens images in the emittance of distant object on the detector that is in the cold shield cover, the cold shield cover has suppressed the background radiation energy, reduced the photon noise on the detector, the heat radiation of target is imaged on the infrared eye target surface, the infrared eye target surface changes thermal imagery into apparent video image, in order to realize the effect of above-mentioned cold shield cover, be provided with refrigeration plant between described camera lens and the infrared eye, described refrigeration plant is a sterlin refrigerator.
Claims (6)
1. medium-wave infrared scouting and tracking lens, it is characterized in that: in its light channel structure along light from left to right direction incident be provided with focal power and be positive preceding group of I and back group II, described before the group I be provided with biconvex eyeglass I-A, concave-concave eyeglass I-B, first month of the lunar year odontoscope sheet I-C successively; Described back group II be provided with successively odontoscope sheet II-A in the first month of the lunar year, negative crescent moon eyeglass II-B and the first month of the lunar year odontoscope sheet II-C.
2. medium-wave infrared scouting and tracking lens according to claim 1 is characterized in that: along the light incident direction, the airspace in preceding group of I between biconvex eyeglass I-A and the concave-concave eyeglass I-B is 1.82mm; Airspace between concave-concave eyeglass I-B and the first month of the lunar year odontoscope sheet I-C is 0.47mm, in the group II of back the first month of the lunar year odontoscope sheet II-A and negative crescent moon eyeglass II-B between the airspace be 2.2mm; Airspace between negative crescent moon eyeglass II-B and the first month of the lunar year odontoscope sheet II-C is 0.48mm.
3. medium-wave infrared scouting and tracking lens according to claim 1, it is characterized in that: described camera lens rear side is provided with the self-regulating heat radiation receiver, described self-regulating heat radiation receiver comprises main tube coupling tunnel, be sheathed on main tube and connect the interior coupling tunnel of cylindrical shell, be sheathed on to connect the Dewar flask coupling tunnel in the cylindrical shell and be sheathed on Dewar flask and connect the interior Dewar flask of cylindrical shell, the front side of described main tube coupling tunnel achieves a fixed connection through the rear side of bolt and camera lens master tube, the rear side of main tube coupling tunnel achieves a fixed connection through bolt and the coupling tunnel of being located in its body, the front side of described coupling tunnel achieves a fixed connection through bolt and the Dewar flask coupling tunnel of being located in its body, the rear side of described Dewar flask coupling tunnel achieves a fixed connection through bolt and the Dewar flask of being located in its body, is provided with cold light hurdle and infrared eye target surface from left to right successively in the Dewar flask and on the center line of light shaft coaxle.
4. medium-wave infrared scouting and tracking lens according to claim 3 is characterized in that: it is 1.76 * 10 that described cold light hurdle adopts expansion coefficient
-6Alloy make, main tube coupling tunnel adopts low alloy steel to make, expansion coefficient is 8.31 * 10
-6, coupling tunnel adopts nonmetallic materials to make, and expansion coefficient is 130 * 10
-6, the Dewar flask coupling tunnel adopts low alloy steel to make, and expansion coefficient is 8.31 * 10
-6, Dewar flask adopts glass to make, and expansion coefficient is 7.5 * 10
-6
5. medium-wave infrared scouting and tracking lens according to claim 1 is characterized in that: be provided with refrigeration plant between described camera lens and the infrared eye.
6. medium-wave infrared scouting and tracking lens according to claim 5 is characterized in that: described refrigeration plant is a sterlin refrigerator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101767008A CN101930112B (en) | 2010-05-19 | 2010-05-19 | Medium-wave infrared scouting and tracking lens |
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|---|---|---|---|
| CN2010101767008A CN101930112B (en) | 2010-05-19 | 2010-05-19 | Medium-wave infrared scouting and tracking lens |
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| CN101930112B CN101930112B (en) | 2012-11-21 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| CN104506827A (en) * | 2015-01-13 | 2015-04-08 | 苏州创捷传媒展览股份有限公司 | Interactive visual shooting device having human body tracking function |
| CN108168705A (en) * | 2017-11-07 | 2018-06-15 | 武汉高芯科技有限公司 | A kind of temperature variation testing system |
| CN110646931A (en) * | 2019-09-25 | 2020-01-03 | 中国科学院光电技术研究所 | Refrigeration type large-relative-aperture off-axis four-mirror optical system |
| CN111623959A (en) * | 2020-05-21 | 2020-09-04 | 中国电子科技集团公司第十一研究所 | MTF test equipment for integrated optical lens group |
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| JPS62173417A (en) * | 1986-01-27 | 1987-07-30 | Canon Inc | Switching type variable power optical system |
| CN101482647A (en) * | 2009-02-20 | 2009-07-15 | 山东神戎电子股份有限公司 | Large-zoom ratio infrared continuous zoom lens of non-refrigeration thermal imaging instrument |
| CN201698079U (en) * | 2010-05-19 | 2011-01-05 | 福建福光数码科技有限公司 | Medium wave infrared reconnaissance tracking lens |
-
2010
- 2010-05-19 CN CN2010101767008A patent/CN101930112B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62173417A (en) * | 1986-01-27 | 1987-07-30 | Canon Inc | Switching type variable power optical system |
| CN101482647A (en) * | 2009-02-20 | 2009-07-15 | 山东神戎电子股份有限公司 | Large-zoom ratio infrared continuous zoom lens of non-refrigeration thermal imaging instrument |
| CN201698079U (en) * | 2010-05-19 | 2011-01-05 | 福建福光数码科技有限公司 | Medium wave infrared reconnaissance tracking lens |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213822A (en) * | 2011-07-12 | 2011-10-12 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| CN102213822B (en) * | 2011-07-12 | 2013-03-13 | 中国电子科技集团公司第十一研究所 | Medium wave infrared continuous zoom lens |
| CN104506827A (en) * | 2015-01-13 | 2015-04-08 | 苏州创捷传媒展览股份有限公司 | Interactive visual shooting device having human body tracking function |
| CN104506827B (en) * | 2015-01-13 | 2018-02-02 | 苏州创捷传媒展览股份有限公司 | Interactive vision filming apparatus with human body tracking function |
| CN108168705A (en) * | 2017-11-07 | 2018-06-15 | 武汉高芯科技有限公司 | A kind of temperature variation testing system |
| CN110646931A (en) * | 2019-09-25 | 2020-01-03 | 中国科学院光电技术研究所 | Refrigeration type large-relative-aperture off-axis four-mirror optical system |
| CN111623959A (en) * | 2020-05-21 | 2020-09-04 | 中国电子科技集团公司第十一研究所 | MTF test equipment for integrated optical lens group |
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Owner name: FUJIAN FORECAM CO., LTD. Free format text: FORMER NAME: FUJIAN FORECAM DIGITAL TECHNOLOGY CO., LTD. |
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Address after: 158 No. 350015 Fujian province Fuzhou Mawei District Jiangbin East Avenue Patentee after: FUJIAN FORECAM CO., LTD. Address before: 350015, Fuzhou, Fujian Province, Mawei District, No. 39 Patentee before: Fujian Forecam Optics Co., Ltd. |