CN102829877A - Infrared optical system suitable for quantum well detector thermal infrared imager - Google Patents
Infrared optical system suitable for quantum well detector thermal infrared imager Download PDFInfo
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- CN102829877A CN102829877A CN2011104237506A CN201110423750A CN102829877A CN 102829877 A CN102829877 A CN 102829877A CN 2011104237506 A CN2011104237506 A CN 2011104237506A CN 201110423750 A CN201110423750 A CN 201110423750A CN 102829877 A CN102829877 A CN 102829877A
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Abstract
The invention relates to an infrared optical system suitable for a quantum well detector thermal infrared imager, which is arranged in the front of a detector. The infrared optical system comprises a first lens, a third lens, a fourth lens and a fifth lens, all of which are coaxial and are sequentially arranged in an incidence direction of an optical path, wherein the first surface of the fourth lens is an aspherical surface. The operation wave band of the infrared optical system is within 7.5-9m infrared long wave; and the focal distance of the optical system is relatively long and is 286.4mm. The long-focus optical system of a thermal infrared imager, disclosed by the invention utilizes few lenses, is excellent in imaging quality, nearly does not have a cold reflection situation, has high resolution and is convenient for assembling a buffing machine.
Description
Technical field
The invention belongs to the design of Optical System field, relate to a kind of optical system of thermal infrared imager.
Background technology
Quantum trap infrared detector is to develop rapidly to big face battle array practicability direction; Become the new detector that to compare mutually with traditional mercury cadmium telluride infrared eye, alleviated the not good enough technical matters that causes of mercury cadmium telluride infrared eye inadequate natural endowment and technical maturity property.The U.S. and European a plurality of country have done a large amount of research work to quantum trap infrared detector; Advantages such as integrated, low-cost with its big battle array, the easy realization batch process of quantum trap infra-red focus planar detector (QWIP) will play a significant role aspect the military equipments such as infrared tracking, scouting, precise guidance, airborne carrier-borne forward looking infrared system.
Lack the long focus optical system of using quantum well infrared focal plane detector (QWIP) thermal infrared imager product and designing in the prior art.
Summary of the invention
The purpose of this invention is to provide a kind of infrared optical system that is applicable to the quantum well detector thermal infrared imager, lack problem to the long focus optical system of quantum trap infra-red focus planar detector (QWIP) thermal infrared imager design in order to solve prior art.
For realizing above-mentioned purpose; Scheme of the present invention is: a kind of infrared optical system that is applicable to the quantum well detector thermal infrared imager; Be used to be arranged on before the detector, this system comprises first, the 3rd, the 4th, the five, four the coaxial lens that set gradually along the light path incident direction; Said first lens are curved month positive lens, and bore is that 150.3mm, thickness are 11mm; The 3rd lens are curved month positive lens, and bore is 62.3mm, and thickness is 6.1mm; The 4th lens are curved month positive lens, and bore is 53.5mm, and thickness is 7mm; The 5th lens are curved month negative lens, and bore is 46.2mm, and thickness is 5.05mm; The first, distance is followed successively by 118.1mm, 164mm, 1mm between the 3rd, the 4th, the five, four lens; First of said the 4th lens is aspheric surface, and asphericity coefficient is: k=0, A=-8.4953e-007, B=-5.1236e-011, C=-2.7840e-013, D=9.0573e-017, E=0, F=0, G=0, H=0, J=0.
The first, also be provided with second lens that are used for replenishing 0 ° to 40 ° temperature range image planes drift between the 3rd lens, these second lens are double-concave negative lens, and bore is 49.4mm, and thickness is 4mm; Be respectively 150.9mm, 13.1mm with the distance of the first, the 3rd lens; Axially adjustment distance is ± 2mm.
Said detector is provided with detector protection window, interval 19.7mm between said the 5th lens and the detector.
Be coated with on first of said first lens in order to increase the dura mater of transmitance.
The long focus optical system of the present invention for designing based on application quantum well infrared focal plane detector (QWIP) infra-red thermal imaging instrument product; Utilize at least four simple lenses (first on one of them lens are aspheric surface); Obtain good picture element, and almost do not have the cold emission phenomenon.The invention of the long focus optical system of this infra-red thermal imaging instrument has the following advantages: lens use number few; Image quality is excellent; Almost there is not the cold emission phenomenon; Resolution is high; Ray machine is debug conveniently.
Description of drawings
Fig. 1 is a system schematic of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further detailed explanation.
Optical system as shown in Figure 1 by by light path trend successively by coaxial lens 1, lens 2, lens 3, lens 4, lens 5 totally five lens form, wherein first of lens 4 is aspheric surface.The system works wave band is at LONG WAVE INFRARED: 7.5m～9m; The focal length of optical system is longer, is 286.4mm.
Germanium), simple lens 2 (double-concave negative lens referring to Fig. 1, the infrared beam of target object radiation passes through coaxial simple lens 1 (a curved month positive lens, material: successively; Zinc selenide), simple lens 3 (curved month positive lens material:; Germanium), simple lens 4 (a curved month positive lens, material: germanium), simple lens 5 (a curved month negative lens, material: zinc selenide) material:; Converge and image in quantum trap infra-red focus planar detector 6, thereby can obtain target image.
Lens 1 bore is that 150.3mm, thickness are 11mm; Lens 2 bores are 49.4mm, and thickness is 4mm; Lens 3 bores are 62.3mm, and thickness is 6.1mm; Lens 4 bores are 53.5mm, and thickness is 7mm; Lens 5 bores are 46.2mm, and thickness is 5.05mm.
Lens 1 and lens 2 interval 118.1mm; Lens 2 and lens 3 interval 150.9mm; Lens 3 and lens 4 interval 13.1mm; Lens 4 are spaced apart 1mm with lens 5; Lens 5 and detector 6 protection window interval 19.7mm.
First of simple lens 4 is aspheric surface, and asphericity coefficient is: k=0, A=-8.4953e-007, B=-5.1236e-011, C=-2.7840e-013, D=9.0573e-017, E=0, F=0, G=0, H=0, J=0.First plating dura mater of simple lens 1 is to increase transmitance.
Simple lens 2 can be used as focusing lens, and axially focusing range is ± 2mm, in order to compensate the drift of 0 ℃～+ 40 ℃ of temperature range image planes, guarantees system's picture element.
This optical system uses the lens number few, and picture element is good, and resolution is high, and does not almost have the cold emission phenomenon.Satisfy the use installation requirement of quantum well infra-red thermal imaging instrument.
Claims (4)
1. an infrared optical system that is applicable to the quantum well detector thermal infrared imager is used to be arranged on before the detector, it is characterized in that, this system comprises first, the 3rd, the 4th, the five, four the coaxial lens that set gradually along the light path incident direction; Said first lens are curved month positive lens, and bore is that 150.3mm, thickness are 11mm; The 3rd lens are curved month positive lens, and bore is 62.3mm, and thickness is 6.1mm; The 4th lens are curved month positive lens, and bore is 53.5mm, and thickness is 7mm; The 5th lens are curved month negative lens, and bore is 46.2mm, and thickness is 5.05mm; The first, distance is followed successively by 118.1mm, 164mm, 1mm between the 3rd, the 4th, the five, four lens; First of said the 4th lens is aspheric surface, and asphericity coefficient is: k=0, A=-8.4953e-007, B=-5.1236e-011, C=-2.7840e-013, D=9.0573e-017, E=0, F=0, G=0, H=0, J=0.
2. a kind of infrared optical system that is applicable to the quantum well detector thermal infrared imager according to claim 1; It is characterized in that; The first, also be provided with second lens that are used for replenishing 0 ° to 40 ° temperature range image planes drift between the 3rd lens; These second lens are double-concave negative lens, and bore is 49.4mm, and thickness is 4mm; Be respectively 150.9mm, 13.1mm with the distance of the first, the 3rd lens; Axially adjustment distance is ± 2mm.
3. a kind of infrared optical system that is applicable to the quantum well detector thermal infrared imager according to claim 1 is characterized in that, said detector is provided with detector protection window, interval 19.7mm between said the 5th lens and the detector.
4. a kind of infrared optical system that is applicable to the quantum well detector thermal infrared imager according to claim 1 is characterized in that, is coated with on first of said first lens in order to increase the dura mater of transmitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104237506A CN102829877A (en) | 2011-12-17 | 2011-12-17 | Infrared optical system suitable for quantum well detector thermal infrared imager |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011104237506A CN102829877A (en) | 2011-12-17 | 2011-12-17 | Infrared optical system suitable for quantum well detector thermal infrared imager |
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| CN102829877A true CN102829877A (en) | 2012-12-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044887A (en) * | 2015-06-02 | 2015-11-11 | 中国科学院上海技术物理研究所 | Refrigeration type infrared optical system of large relative aperture and super wide angle |
| CN108398771A (en) * | 2017-02-08 | 2018-08-14 | 大立光电股份有限公司 | Optical image capturing lens system, image capturing device and electronic device |
| CN109932061A (en) * | 2019-04-02 | 2019-06-25 | 北京环境特性研究所 | A kind of face battle array thermal infrared imager real-time correction method based on cold emission |
| CN112946907A (en) * | 2021-01-29 | 2021-06-11 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field visible-infrared integrated compact optical camera |
-
2011
- 2011-12-17 CN CN2011104237506A patent/CN102829877A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044887A (en) * | 2015-06-02 | 2015-11-11 | 中国科学院上海技术物理研究所 | Refrigeration type infrared optical system of large relative aperture and super wide angle |
| CN108398771A (en) * | 2017-02-08 | 2018-08-14 | 大立光电股份有限公司 | Optical image capturing lens system, image capturing device and electronic device |
| CN109932061A (en) * | 2019-04-02 | 2019-06-25 | 北京环境特性研究所 | A kind of face battle array thermal infrared imager real-time correction method based on cold emission |
| CN112946907A (en) * | 2021-01-29 | 2021-06-11 | 中国科学院长春光学精密机械与物理研究所 | Large-view-field visible-infrared integrated compact optical camera |
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Application publication date: 20121219 |