CN102331617A - Double-field/bicolor infrared passive athermal optical system - Google Patents
Double-field/bicolor infrared passive athermal optical system Download PDFInfo
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- CN102331617A CN102331617A CN201110284708A CN201110284708A CN102331617A CN 102331617 A CN102331617 A CN 102331617A CN 201110284708 A CN201110284708 A CN 201110284708A CN 201110284708 A CN201110284708 A CN 201110284708A CN 102331617 A CN102331617 A CN 102331617A
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Abstract
The invention relates to a double-field/bicolor infrared passive athermal optical system. For the double-field/bicolor infrared passive athermal optical system, the working waveband is 4.4-5.4um/7.8-8.8um, the focal length is 183mm/61mm, and the working temperature is minus 40 DEG C-60 DEG C. The wide and narrow field optical systems have same F values (2.68), together use the same one bicolor infrared focal plane detector and have cold light stop efficiency approximate to 100 percent; and the MWIR (Medium Wave Infrared Ray) and LWIR (Long Wave Infrared Ray) are always in cofocal imaging within a working range by adopting an optical passive athermal manner, any lens is not moved to adapt to the working environment during the using process, thus achieving a good athermal effect. The double-field/bicolor infrared passive athermal optical system consists of a focusing mirror group, a fixed mirror group, a wide field zooming mirror group, a narrow field zooming mirror group, bicolor infrared detector window glass, a stop and a bicolor infrared detector. All optical surfaces of the system are spherical surfaces, and the optical materials only have two common infrared materials, namely germanium and imported silicon.
Description
Technical field
The present invention relates to a kind of double-view field/double-colored IR Passive heat difference optical system that disappears, belong to the infrared thermal imaging field.
Background technology
The double-view field optical system has two imaging viewing fields that vary in size, and helps realizing the target following of the target search and the small field of view of big visual field.Double-colored infrared optical system can obtain the target information of two wave bands simultaneously, and complicated background is suppressed, and can improve Target Detection Ability of Infrared, reduces false alarm rate.Double-colored confocal optical system does not need the wave band switching device shifter, and system is simple, compact conformation, obviously improve detection efficiency.The infrared heat difference optical system that disappears can be operated in the complex operating environment, satisfies military demand.
Double-colored infrared optical system itself is owing to exist bigger aberration, realizes that two wave bands are confocal to have certain technical difficulty, needs the choose reasonable optical material, but that infrared optical material can be applied to the optional scope of dual-waveband imaging simultaneously is very little again; When guaranteeing that two wave bands are confocal, the heat difference effect that in the handoff procedure of visual field, will realize disappearing has promoted technical difficulty from another angle again.In addition, optical system need be considered the cold stop matching problem with infrared refrigeration detector.All difficulty cause domestic existing optical system to stay in mostly not disappearing the double-view field dual-waveband imaging stage of heat.At present; The promptly French double-view field two waveband switching imaging optical system of state-of-the-art optical system in the infrared thermal imaging optical system of external report; This system does not have the high advantage of detectivity of double-colored confocal system, and the still not mentioned native system of available data has disappeared, and heat is poor to be considered.Therefore grind double-view field/dual-color red heat difference optical system that disappears outward and have unrivaled invention and using value.
The optical system that adopts the both at home and abroad hot difference method that disappears roughly is divided into four kinds, and promptly mechanical passive type, electronics is active, optics is active and the PASSIVE OPTICAL formula.The passive heat difference mode that disappears of machinery makes the whole optical system volume become big, and quality increases; The electronics heat difference mode that initiatively disappears makes the optical system reliability decrease, is unfavorable for the missile-borne design of Optical System; Optics heat difference mode and the PASSIVE OPTICAL heat difference mode that disappears that initiatively disappears shows complicacy more slightly, need when environmental change, move optical element; The PASSIVE OPTICAL heat difference mode that disappears is meant the difference of utilizing between optical material and the mechanical lens barrel material thermal characteristics, through the reasonable combination between the different qualities material eliminating Influence of Temperature, thereby obtain to disappear thermal effect.Have that mechanism is simple relatively, size is little, light weight, need not supply power, advantage that system reliability is good, its overall efficiency is the highest.
Summary of the invention
The purpose of this invention is to provide a kind of double-view field/double-colored IR Passive heat difference optical system that disappears, have that above-mentioned double-view field, dual-color red are outer, the advantage of the heat that disappears difference optical system.
Double-view field of the present invention/double-colored IR Passive heat difference optical system that disappears, service band is 4.4-5.4um/7.8-8.8um, and focal length is 183mm/61mm, and working temperature is-40 ℃～+ 60 ℃.Width visual field optical system F number identical (2.68), shared same double-colored infrared focal plane detector has approximate 100% cold stop efficient; Adopt the PASSIVE OPTICAL hot mode that disappears to make MWIR and LWIR confocal imaging all the time in working range, need not to move any lens in the use and adapt to working environment, reached the good heat that disappears and differed from effect.Its structure comprises focusing mirror group, fixed mirror group, wide visual field varifocal mirror group, narrow visual field varifocal mirror group, dual-color red external detector window glass, diaphragm and dual-color red external detector.Each optical surface of system is sphere, and optical material has only two kinds of infra-red materials commonly used: germanium and import silicon.
Described double-view field/double-colored IR Passive heat difference optical system that disappears adopts a slice spherical mirror (material is an import silicon) as focusing mirror group.
Described double-view field/double-colored IR Passive heat difference optical system that disappears adopts a slice spherical mirror (material is a germanium) as the fixed mirror group.
Described focusing mirror group and fixed mirror group are width visual field shared mirror group structure, through moving focusing mirror group, change the distance between focusing mirror group and the fixed mirror group, can realize the focusing of limited distance to the infinite distance.
Described double-view field/double-colored IR Passive heat difference optical system that disappears adopts the varifocal mirror group of two spherical mirrors (material is germanium) as wide visual field, and employing a slice spherical mirror (material is a germanium) is as the varifocal mirror group of narrow visual field.Switch the conversion of realization visual field through two varifocal mirror groups around a certain stationary shaft rotation that is parallel to optical axis direction.
The disappear dual-color red external detector of heat difference optical system of described double-view field/double-colored IR Passive adopts refrigerated infrared focal plane probe, is used for receiving simultaneously the image of MWIR and LWIR.
Described double-view field/double-colored IR Passive heat difference optical system that disappears, the cold stop that adopts detector to satisfy approximate hundred-percent cold stop efficient, is eliminated the parasitic light that arrives detector as aperture diaphragm, improves detectivity.
The present invention is double-view field/double-colored IR Passive heat difference optical system that disappears, and has following beneficial effect:
1, same system can be realized target search and two functions of target following.
2, can medium wave and LONG WAVE INFRARED while confocal imaging be improved Target Detection Ability of Infrared, reduce false alarm rate;
3, system realizes the accurately passive heat that disappears of two wave bands, has stronger environmental suitability.
4, reduced difficulty of processing and production cost, have simple in structure, volume is little, lightweight advantage.
Description of drawings
Fig. 1 is that double-view field/double-colored IR Passive heat difference optical system that disappears is operated in the structural representation (also as Figure of abstract) of wide visual field;
Fig. 2 is that double-view field/double-colored IR Passive heat difference optical system that disappears is operated in the structural representation of narrow visual field.
Among the figure: 1, focusing mirror group, 2, the fixed mirror group, 3, wide visual field varifocal mirror group, 4, narrow visual field varifocal mirror group, 5, dual-color red external detector window glass, 6, diaphragm, 7, the dual-color red external detector.
Embodiment
As shown in Figure 1; The infrared waves that send in the target emanation source is received by described focusing mirror group 1; Arrive wide visual field varifocal mirror group 3 or narrow visual field varifocal mirror group 4 through fixed mirror group 2; The window glass 5 of last order through the dual-color red external detector is to reach wide visual field varifocal mirror group 3 or narrow visual field varifocal mirror group 4; Last order is imaged onto on the dual-color red external detector 7 through the window glass 5 and the diaphragm 6 of dual-color red external detector, the dual-color red external detector is carried out Flame Image Process can distinguish the infrared radiation target with identification.Optical system changes the distance between focusing mirror group and the fixed mirror group through moving focusing mirror group, can realize the focusing of limited distance to the infinite distance; Switch the conversion of realization visual field through two varifocal mirror groups around a certain stationary shaft rotation that is parallel to optical axis direction, reach the conversion purpose of target search and target following pattern.Optical system can work under the complex environment temperature for the complete passive heat that disappears, and is used for complex background identification.
Below provide the dynamic duty process:
Its first function; Accomplish wide visual field target search: as shown in Figure 1; When the infrared waves of target emanation are received by said focusing mirror group 1, arrive wide visual field varifocal mirror group 3 through fixed mirror group 2, last order is through the window glass 5 and the diaphragm 6 of dual-color red external detector; Be imaged onto on the dual-color red external detector 7, can realize search target context.
Its second function, accomplish the small field of view target following: as shown in Figure 2, when wide visual field varifocal mirror group 3 was switched to narrow visual field varifocal mirror group 4, system stepped into small field of view target following state, can realize the real-time follow-up work to target.
Its 3rd function; Operate as normal under the complex work environment: of first and second function; Described double-view field/double-colored IR Passive heat difference optical system that disappears is carried out the heat that initiatively disappears at-40 ℃-60 ℃, can work in the interior any working environment of this temperature range.
Claims (2)
1. double-view field/double-colored IR Passive heat difference optical system that disappears, service band is 4.4-5.4um/7.8-8.8um, and focal length is 183mm/61mm, and working temperature is-40 ℃～+ 60 ℃.Width visual field optical system F number identical (2.68), shared same double-colored infrared focal plane detector has approximate 100% cold stop efficient; Adopt the PASSIVE OPTICAL hot mode that disappears to make MWIR and LWIR confocal imaging all the time in working range, need not to move any lens in the use and adapt to working environment, reached the good heat that disappears and differed from effect.Its structure comprises focusing mirror group, fixed mirror group, wide visual field varifocal mirror group, narrow visual field varifocal mirror group, dual-color red external detector window glass, diaphragm and dual-color red external detector.Each optical surface of system is sphere, and optical material has only two kinds of infra-red materials commonly used: germanium and import silicon.
2. double-view field according to claim 1/double-colored IR Passive heat difference optical system that disappears; It is characterized in that: the infrared waves that send in the target emanation source is received by described focusing mirror group 1; Arrive wide visual field varifocal mirror group 3 or narrow visual field varifocal mirror group 4 through fixed mirror group 2; Last order is imaged onto dual-color red external detector 7 through the window glass 5 and the diaphragm 6 of dual-color red external detector, the dual-color red external detector is carried out Flame Image Process can distinguish the infrared radiation target with identification.Optical system changes the distance between focusing mirror group and the fixed mirror group through moving focusing mirror group, can realize the focusing of limited distance to the infinite distance; Switch the conversion of realization visual field through two varifocal mirror groups around a certain stationary shaft rotation that is parallel to optical axis direction, reach the conversion purpose of target search and target following pattern.Optical system can work under the complex environment temperature for the complete passive heat that disappears, and is used for complex background identification.
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| CN201110284708A CN102331617A (en) | 2011-09-23 | 2011-09-23 | Double-field/bicolor infrared passive athermal optical system |
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| CN201110284708A CN102331617A (en) | 2011-09-23 | 2011-09-23 | Double-field/bicolor infrared passive athermal optical system |
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Cited By (5)
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| CN103676111A (en) * | 2013-12-09 | 2014-03-26 | 西南技术物理研究所 | Double-field-of-view long-wave infrared optics passive athermalization optical system |
| CN104656262A (en) * | 2015-02-10 | 2015-05-27 | 北京空间机电研究所 | Dual-optical-path multi-object-distance multi-focal-distance optical imaging system based on shared light inlet |
| CN105425371A (en) * | 2015-12-14 | 2016-03-23 | 福建福光股份有限公司 | Compact medium-wave infrared continuous zoom lens |
| CN106249383A (en) * | 2016-08-30 | 2016-12-21 | 福建福光股份有限公司 | Two grades of visual field tracking measurement camera lenses of long-focus |
| CN106405806A (en) * | 2016-10-21 | 2017-02-15 | 北京航天长征飞行器研究所 | Ultrawide spectrum segment athermalization projection optical system for infrared objet simulator |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676111A (en) * | 2013-12-09 | 2014-03-26 | 西南技术物理研究所 | Double-field-of-view long-wave infrared optics passive athermalization optical system |
| CN103676111B (en) * | 2013-12-09 | 2016-05-25 | 西南技术物理研究所 | The double-view field LONG WAVE INFRARED PASSIVE OPTICAL poor optical system of heat that disappears |
| CN104656262A (en) * | 2015-02-10 | 2015-05-27 | 北京空间机电研究所 | Dual-optical-path multi-object-distance multi-focal-distance optical imaging system based on shared light inlet |
| CN105425371A (en) * | 2015-12-14 | 2016-03-23 | 福建福光股份有限公司 | Compact medium-wave infrared continuous zoom lens |
| CN105425371B (en) * | 2015-12-14 | 2018-01-12 | 福建福光股份有限公司 | Compact medium wave infrared continuous zoom lens |
| CN106249383A (en) * | 2016-08-30 | 2016-12-21 | 福建福光股份有限公司 | Two grades of visual field tracking measurement camera lenses of long-focus |
| CN106249383B (en) * | 2016-08-30 | 2018-07-27 | 福建福光股份有限公司 | Two grades of visual field tracking measurement camera lenses of long-focus |
| CN106405806A (en) * | 2016-10-21 | 2017-02-15 | 北京航天长征飞行器研究所 | Ultrawide spectrum segment athermalization projection optical system for infrared objet simulator |
| CN106405806B (en) * | 2016-10-21 | 2019-02-26 | 北京航天长征飞行器研究所 | A kind of ultra-wide spectral coverage athermal projection optical system for infrared target simulator |
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Application publication date: 20120125 |