CN201945734U - Non-refrigeration dual field-of-view infrared optical system - Google Patents
Non-refrigeration dual field-of-view infrared optical system Download PDFInfo
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- CN201945734U CN201945734U CN201020572807.XU CN201020572807U CN201945734U CN 201945734 U CN201945734 U CN 201945734U CN 201020572807 U CN201020572807 U CN 201020572807U CN 201945734 U CN201945734 U CN 201945734U
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Abstract
The utility model relates to a non-refrigeration dual field-of-view infrared optical system, which belongs to the technical field of optics. A first meniscus positive lens, a second double concave negative lens, a diaphragm, a third double convex positive lens, a fourth double convex positive lens and a fifth meniscus positive lens and a probe are sequentially arranged from an object part to an image part. The second double concave negative lens can move between a fist lens and the diaphragm in an axial direction to respectively form a narrow field-of-view light path and a wide field-of-view light path. The non-refrigeration dual field-of-view infrared optical system is provided with a narrow field-of-view for marking objects and a wide field-of-view for probing the objects. A non-spherical design is adopted to improve freedom of a design of a dual field-of-view optical system, to increase optional variables in optimization design, and to enable an image differential design to be prone to obtain qualified images. Focusing compensation and switching of the two fields of view are realized through the movement of one lens so that motion mechanisms in the system are reduced. The rest of the parts in the light path are fixed. The non-refrigeration dual field-of-view infrared optical system is simple to assemble and adjust and greatly reduces difficulty in assembly and adjustment of the system.
Description
Technical field
The utility model relates to a kind of non-refrigeration double-view field infrared optical system, belongs to optical technical field.
Background technology
Thermal infrared imager is a kind of infrared radiation that is used for detection of a target object, and by means such as opto-electronic conversion, electric signal processing, the temperature distribution image of target object is converted to the high-tech product of video image.Infrared acquisition has certain penetrating, and cigarette, mist, haze, snow etc. limit and the ability of identification camouflage, can realize at a distance round-the-clock observation.Be particularly useful under night and the bad-weather condition detection to target.
Non-refrigeration thermal infrared imager is used very extensive owing to do not need refrigeration and cheap at civil areas such as electric power, fire-fighting, industry, medical treatment, security protections.Infrared optical system plays important effect in non-refrigerated thermal imager, various monoscopic, double-view field, many visual fields, continuous magnification lens have obtained widespread use.Wherein, the application of double-view field optical system is particularly extensive.Therefore, various double-view field Optical System Research are shown important especially.
In the double-view field system commonly used, become doubly group, compensation and organize the conversion that two groups of lens move the realization double-view field, increased the workload that ray machine is debug like this, and precision not be too high.
The utility model content
The purpose of this utility model provides a kind of non-refrigeration double-view field infrared optical system, debugs complicated problems to solve the existing system ray machine.
For achieving the above object, a kind of non-refrigeration double-view field infrared optical system of the utility model, the coaxial successively from the object side to the image side first bent moon positive lens, second double-concave negative lens, diaphragm, the 3rd biconvex positive lens, the 4th biconvex positive lens, the 5th bent moon negative lens and the detector of being provided with, second double-concave negative lens can move between first lens and diaphragm vertically, constitutes narrow visual field light path and wide visual field light path respectively.
A kind of axial change times double-view field optical system of the present utility model, by utilizing the object-image conjugate principle, realization is moved by a slice lens, realizes conversion wide, narrow double-view field; Utilize this mobile lens to focus, compensation is under-40 ℃～+ 60 ℃ environment temperature, and the influence that system's picture element that the image planes drift causes descends focuses on the detector focal plane image planes again; Adopt aspheric surface to improve picture element, and make the light path length overall of double-view field optical system shorter.The utlity model has two optics visual fields of narrow/wide, wide visual field is used for the detection of target, and narrow visual field is used for identification of targets; The design of employing aspheric surface makes the degree of freedom of double-view field design of Optical System become big, and the selectable variable of optimized design increases, and makes the optical system aberration design be easy to reach good results, obtains good picture element; Owing to adopt the conversion and the focusing compensation that realize two visual fields with moving of a slice lens, reduced the motion in the system, the remaining part in the light path is fixed part, debugs simply, has reduced the resetting difficulty of system to a great extent.
Description of drawings
Fig. 1 is a narrow visual field of the present utility model index path.
Embodiment
A kind of non-refrigeration double-view field infrared optical system of the present utility model is to adopt the object-image conjugate principle, by 1 axially movable method of lens, realizes that the light path of double-view field infrared optical system is switched.This system comprises the coaxial successively from the object side to the image side first bent moon positive lens, second double-concave negative lens, diaphragm, the 3rd biconvex positive lens, the 4th biconvex positive lens, the 5th bent moon negative lens and the detector of being provided with.
Germanium), the second lens 2(double-concave negative lens, material extraneous scenery radiation is through the first lens 1(bent moon positive lens, material:: germanium), diaphragm 3(circular hole), the 3rd lens 4(biconvex positive lens, material: germanium), the 4th lens 5(biconvex positive lens, material: germanium), the 5th lens 6(bent moon negative lens, material: zinc selenide) focus on detector 7 focal planes.When second lens 2 are in A position shown in Figure 1, constitute the narrow visual field of optical system light path.When second lens 2 move vertically, when being in the B position, constitute the wide visual field of optical system light path.When second lens 2 moved back to diagram A position vertically, narrow visual field light path was got back in the visual field.The specific design parameter of this optical system is as shown in table 1.
Table 1
When second lens 2 were in the A point, first lens 1 and second lens 2 are 63.5mm, second lens 2 and diaphragm 3 interval 17.5mm at interval; When second lens were in the B point, first lens 1 and second lens 2 are 20mm, second lens 2 and diaphragm 3 interval 61mm at interval; Diaphragm 3 and the 3rd lens 4 are 18.1mm at interval; The 3rd lens 4 and the 4th lens 5 are 47.6mm at interval; The 4th lens 5 and the 5th lens 6 are 0.1mm at interval; The 5th lens 6 and detector 7 protection window interval 51.3mm.Interval between each lens can be adjusted according to the image quality evaluation result.
When second lens 2 are in A shown in Figure 1 position, constitute the narrow visual field of optical system light path.When second lens 2 move vertically, when being in the B position, constitute the wide visual field of optical system light path.When second lens 2 moved back to A shown in Figure 1 position vertically, narrow visual field light path was got back in the visual field.Narrow visual field focal length is that 114.3mm, wide visual field focal length are 56.7mm; System adopts Polaroid mode; First axial space length to the detector cover glass of system is 232mm.F number: 1; Distortion≤2.5% in the full visual field.The detector that is suitable for is the non-refrigeration LONG WAVE INFRARED focus planardetector of pixel count 640 * 480, pixel size 25 μ m, applicable wavelengths: 8 μ m～14 μ m; Centre wavelength: 10 μ m; Effective imaging area: 16mm * 12mm; Cover glass thickness is 1mm, and material is a germanium; Apart from cover glass 1.9mm is the detector image planes.Second lens 2 can carry out in two positions of A, B ± the moving of 1mm, be used for compensating the drift of-40 ℃～+ 60 ℃ of temperature range image planes, and guarantee system's picture element.The position that A, B are 2 should be determined according to the result of image quality evaluation, can adjust.
Claims (1)
1. non-refrigeration double-view field infrared optical system, it is characterized in that: the coaxial successively from the object side to the image side first bent moon positive lens, second double-concave negative lens, diaphragm, the 3rd biconvex positive lens, the 4th biconvex positive lens, the 5th bent moon negative lens and the detector of being provided with, second double-concave negative lens can move between first lens and diaphragm vertically, constitutes narrow visual field light path and wide visual field light path respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020572807.XU CN201945734U (en) | 2010-10-22 | 2010-10-22 | Non-refrigeration dual field-of-view infrared optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020572807.XU CN201945734U (en) | 2010-10-22 | 2010-10-22 | Non-refrigeration dual field-of-view infrared optical system |
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| CN201945734U true CN201945734U (en) | 2011-08-24 |
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| CN201020572807.XU Expired - Lifetime CN201945734U (en) | 2010-10-22 | 2010-10-22 | Non-refrigeration dual field-of-view infrared optical system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062932A (en) * | 2010-10-22 | 2011-05-18 | 中国航空工业集团公司洛阳电光设备研究所 | Uncooled double-field-of-view infrared optical system |
| CN103994826A (en) * | 2014-05-26 | 2014-08-20 | 山东神戎电子股份有限公司 | Non-refrigeration thermal infrared imager capable of switching view fields |
| CN108152935A (en) * | 2018-01-12 | 2018-06-12 | 中国科学院长春光学精密机械与物理研究所 | Long wave infrared imaging optical system |
-
2010
- 2010-10-22 CN CN201020572807.XU patent/CN201945734U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062932A (en) * | 2010-10-22 | 2011-05-18 | 中国航空工业集团公司洛阳电光设备研究所 | Uncooled double-field-of-view infrared optical system |
| CN102062932B (en) * | 2010-10-22 | 2013-07-31 | 中国航空工业集团公司洛阳电光设备研究所 | Uncooled double-field-of-view infrared optical system |
| CN103994826A (en) * | 2014-05-26 | 2014-08-20 | 山东神戎电子股份有限公司 | Non-refrigeration thermal infrared imager capable of switching view fields |
| CN108152935A (en) * | 2018-01-12 | 2018-06-12 | 中国科学院长春光学精密机械与物理研究所 | Long wave infrared imaging optical system |
| CN108152935B (en) * | 2018-01-12 | 2020-09-01 | 中国科学院长春光学精密机械与物理研究所 | Long-wave infrared imaging optical system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20130731 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20110824 Effective date of abandoning: 20130731 |
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| RGAV | Abandon patent right to avoid regrant |