CN201812081U - Mobile zoom dual-FOV infrared optical system with intermediate image surface - Google Patents
Mobile zoom dual-FOV infrared optical system with intermediate image surface Download PDFInfo
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- CN201812081U CN201812081U CN 201020260967 CN201020260967U CN201812081U CN 201812081 U CN201812081 U CN 201812081U CN 201020260967 CN201020260967 CN 201020260967 CN 201020260967 U CN201020260967 U CN 201020260967U CN 201812081 U CN201812081 U CN 201812081U
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Abstract
The utility model relates to a mobile zoom dual FOV (field of view) infrared optical system with an intermediate image surface, which has the main technical characteristics that the system comprises four lens including a front fixing group (7), two zoom groups (8), and a rear fixing group (9), wherein the zoom groups (8) can axially move front and back along the intermediate image surface, and respectively form an object lens group with the front fixing group (7) or a repeater group with the rear fixing group (9), so that the switching-over between a wide FOV and a narrow FOV is realized, the focal length of the system is changed, the image surface of the system is kept stable, and the image quality approaches a diffraction limit. A secondary imaging optical structure is adopted by the system to be conveniently matched with a refrigeration focal plane detector, and the aperture of a first object lens can be reduced. The infrared optical system provided by the utility model has the advantages of simple structure, small volume, less lens, high transmissivity rate, light weight, low cost, high sensitivity, can not only achieve the function of searching (the wide FOV) and aiming at (the narrow FOV), but also meet the requirement for miniaturization and light-weight trend of the system.
Description
Technical field
The present invention relates to a kind of optical system, be mainly used in military or civilian infrared eye double-view field infrared imaging system.
Background technology
Infrared optical system is an indispensable part in the whole infra-red thermal imaging system, and its major function is to collect the infrared energy and the control image quality of target emanation.Normally with uniaxial monoscopic (only can realize aiming or function of search) work, function singleness develops limited early stage infrared optical system.Along with the development of infrared thermal imaging technique, require infrared optical system to have high-quality, multi-functional characteristics satisfy the requirement to aiming at simultaneously and search in the specific field range, the double-view field infrared optical system occurred.The double-view field infrared optical system of classic method design is to realize by dual mode: the one, and dependence is cut/is cut out change and doubly organizes lens and realize (as shown in Figure 1), traditional incision/cut out formula double-view field infrared optical system, by objective lens 1, become doubly organize 3,4 and relaying group 2 form.Doubly organize 3,4 when cutting out light path when becoming, to constitute narrow visual field system,, to constitute wide visual field system when becoming when doubly organizing 3,4 incision light paths.The 2nd, doubly to organize lens and realize (as shown in Figure 2) by moving axially change, traditional axial displacement double-view field infrared optical system by objective lens 1, becomes and doubly organizes 5, and fixing group 6 in back and relaying group 2 are formed.Doubly organize 5 reaches when becoming, to constitute narrow visual field system, to move after doubly organizing 5, to constitute wide visual field system when becoming.These two kinds of optical system structures are complicated as can be seen, and size is big, and lens numbers is many, and quality is heavy, the cost height, and transmitance is low, is difficult to satisfy the requirement of miniaturization, lightness when keeping the infrared system image quality.
Summary of the invention
The technical problem underlying that the present invention solves is: according to the deficiency of existing double-view field infrared optical system existence, provide a kind of new intermediate image plane that only constitutes to move and become times mode double-view field infrared optical system by four lens, can obtain double-view field handoff functionality simple in structure, realize search (wide visual field) and aiming (narrow visual field) function, satisfy the requirement of infrared system miniaturization, lightness.
Technical scheme of the present invention is: optical system by preceding fixedly group, become doubly four refractors of the fixing group of group and back and form.Principle of work of the present invention: the radius of scenery target is through preceding fixedly group and become the objective lens post-concentration that group doubly constitutes, and forms intermediate image plane, and at this moment, the fixing group in back is carried out secondary imaging to middle image planes, realizes narrow visual field system.The radius of scenery target forms intermediate image plane through preceding fixedly group post-concentration, at this moment, becomes the relaying group that the fixing group of group and back doubly constitutes middle image planes are carried out secondary imaging, realizes wide visual field system.The ratio of the effective focal length of the effective focal length during system narrow visual field during with wide visual field is exactly the change multiple proportions of this optical system.
The present invention proves by practical probation: optical texture is simple, size is little, lens numbers reduces, weight saving about 45%, cost savings about 50%, it is about 10% that transmitance increases, and when realizing search (8.25 ° * 6.3 ° of wide visual fields) and aiming at (2.75 ° * 2.1 ° of narrow visual fields) function, satisfies the requirement of system's miniaturization, lightness.This optical system satisfies the operation technique requirement of various infrared systems fully.
Description of drawings
Fig. 1 is existing incision/cut out formula double-view field infrared optical system figure.
Fig. 2 is existing axial displacement double-view field infrared optical system figure.
Fig. 3 is an optical system diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe the present invention.
With reference to Fig. 3, concrete technical scheme of the present invention is: optical system by new preceding fixedly group 7, become doubly organize 8 and back 9 four lens of fixing group form.
With reference to Fig. 3, doubly organize 8 by change and be advanced to the intermediate image plane front vertically, constitute object lens with preceding fixedly group 7, realize narrow visual field; Doubly organize 8 and move on to the intermediate image plane back after vertically by becoming, to constitute the relaying groups, to realize wide visual field with the fixing group 9 in back; Thereby realize the switching of narrow/wide visual field
With reference to Fig. 3; consider the environmental suitability of this optical system, preceding fixedly group 7 lens can select for use silicon materials to make, and also can select germanium material or zinc selenide material for use; for (as sandstorm, salt fog erosion etc.) work under rugged surroundings, but first superhard rete such as coating diamond-like protected.
With reference to Fig. 3, infrared system becomes a times mode and adopts change doubly to organize 8 to realize becoming doubly at the forward and backward axial translation of doing of intermediate image plane, realize the function of focusing and thermal compensation simultaneously.
With reference to Fig. 3, whole optical system is aspect the material selection, and lens can be selected for use cheap, and infra-red material silicon commonly used (Si) that obtains easily or germanium (Ge) making.
With reference to Fig. 3, system is the secondary imaging optical texture, is convenient to be complementary with the refrigeration mode focus planardetector.
With reference to Fig. 3, the characteristics of system are: 1. doubly organize 8 by change and be advanced to the intermediate image plane front vertically, constitute objective lens with preceding fixedly group 7, realize narrow visual field; Doubly organize 8 and move on to the intermediate image plane back after vertically by becoming, to constitute the relaying groups, to realize wide visual field with the fixing group 9 in back; Thereby realize the switching of narrow/wide visual field, both changed the position of intermediate image plane, changed the focal length of system again, and guarantee that system's image planes keep stablizing constant, image quality is near diffraction-limited; 2. only need an electromechanical assembly and mobile change doubly to organize 8 and just can realize the double-view field handoff functionality, become doubly organize 8 only effective in two forward and backward positions of intermediate image plane.Change is doubly organized 8 and is not only had anamorphosis function, also has closely focusing, the temperature compensation function of variation of ambient temperature, when optical system is operated under the rugged surroundings or observes the target of different distance, the optical system image planes can move, cause imaging to thicken, the mobile times group that becomes of trace this moment can be dealt with problems; 3. optical lens is few, only uses four lens, guarantees system's transmitance height, light weight, and volume is little; 4. system architecture compactness, size is short, and system always is about 130mm; 5. adopt the secondary imaging optical texture, be convenient to be complementary, guarantee that cold shield efficiency reaches 100% with the refrigeration mode focus planardetector.In a word, the present invention has realized the conversion of monochromatic light road double-view field cleverly by move axially one group of Zoom lens at the intermediate image plane before and after edge, has effectively reduced the sheet number of lens, has simplified the structure of system, has realized the requirement of miniaturization, lightness.
Main optical performance parameter of the present invention is as follows:
Claims (3)
1. an intermediate image plane moves and becomes times mode double-view field infrared optical system, it is characterized in that: by preceding fixedly group (7), become doubly that group (8) and back are fixing to be organized (9) four refractors and form, becoming doubly, group (8) is advanced to the intermediate image plane front vertically, constitute objective lens with preceding fixedly group (7), realize narrow visual field; Become a times group (8) and move on to the intermediate image plane back vertically,, realize wide visual field with the fixing group in back (9) formation relaying group.
2. intermediate image plane according to claim 1 moves and becomes times mode double-view field infrared optical system, it is characterized in that: lens are made of silicon or germanium material.
3. intermediate image plane according to claim 1 and 2 moves and becomes times mode double-view field infrared optical system, it is characterized in that: preceding fixedly group (7) lens zinc selenide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020260967 CN201812081U (en) | 2010-07-16 | 2010-07-16 | Mobile zoom dual-FOV infrared optical system with intermediate image surface |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020260967 CN201812081U (en) | 2010-07-16 | 2010-07-16 | Mobile zoom dual-FOV infrared optical system with intermediate image surface |
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| CN201812081U true CN201812081U (en) | 2011-04-27 |
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| CN 201020260967 Expired - Fee Related CN201812081U (en) | 2010-07-16 | 2010-07-16 | Mobile zoom dual-FOV infrared optical system with intermediate image surface |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269871A (en) * | 2011-07-15 | 2011-12-07 | 昆明物理研究所 | Bicolor dual-view field infrared imaging optical system |
| CN102331617A (en) * | 2011-09-23 | 2012-01-25 | 长春理工大学 | Double-field/bicolor infrared passive athermal optical system |
| CN103389570A (en) * | 2013-07-23 | 2013-11-13 | 中国科学院长春光学精密机械与物理研究所 | Medium wave infrared continuous zooming optical system with high zoom ratio |
| CN104198045A (en) * | 2014-09-19 | 2014-12-10 | 北京仿真中心 | Dual-field-of-view infrared thermal imager |
| CN104267484A (en) * | 2014-02-20 | 2015-01-07 | 山东神戎电子股份有限公司 | Small size uncooled dual-field-of-view infrared optical system |
| CN105547493A (en) * | 2015-12-08 | 2016-05-04 | 中国航空工业集团公司洛阳电光设备研究所 | Assembling and adjusting method for three-field of view confocal plane in infrared imaging technology and imaging device |
-
2010
- 2010-07-16 CN CN 201020260967 patent/CN201812081U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269871A (en) * | 2011-07-15 | 2011-12-07 | 昆明物理研究所 | Bicolor dual-view field infrared imaging optical system |
| CN102269871B (en) * | 2011-07-15 | 2013-08-28 | 昆明物理研究所 | Bicolor dual-view field infrared imaging optical system |
| CN102331617A (en) * | 2011-09-23 | 2012-01-25 | 长春理工大学 | Double-field/bicolor infrared passive athermal optical system |
| CN103389570A (en) * | 2013-07-23 | 2013-11-13 | 中国科学院长春光学精密机械与物理研究所 | Medium wave infrared continuous zooming optical system with high zoom ratio |
| CN103389570B (en) * | 2013-07-23 | 2015-06-10 | 中国科学院长春光学精密机械与物理研究所 | Medium wave infrared continuous zooming optical system with high zoom ratio |
| CN104267484A (en) * | 2014-02-20 | 2015-01-07 | 山东神戎电子股份有限公司 | Small size uncooled dual-field-of-view infrared optical system |
| CN104267484B (en) * | 2014-02-20 | 2017-01-25 | 山东神戎电子股份有限公司 | Small size uncooled dual-field-of-view infrared optical system |
| CN104198045A (en) * | 2014-09-19 | 2014-12-10 | 北京仿真中心 | Dual-field-of-view infrared thermal imager |
| CN105547493A (en) * | 2015-12-08 | 2016-05-04 | 中国航空工业集团公司洛阳电光设备研究所 | Assembling and adjusting method for three-field of view confocal plane in infrared imaging technology and imaging device |
| CN105547493B (en) * | 2015-12-08 | 2019-01-29 | 中国航空工业集团公司洛阳电光设备研究所 | The Method of Adjustment and imaging device of three view field confocal planes in infrared imagery technique |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20150716 |
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| EXPY | Termination of patent right or utility model |