Diaphragm-changeable infrared double-view-field optical lens

An optical lens, dual field of view technology, applied in optics, optical components, optical radiation measurement, etc., can solve the problem of a large number of lenses

Active Publication Date: 2012-12-19
HEBEI HANGUANG HEAVY IND
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Problems solved by technology

[0004] Existing foreign patents such as US6424460B 1 realize dual-field switching, but the number of lenses is large; domestic patents such as CN102062932A double-field focal length zoom is 2

Method used

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  • Diaphragm-changeable infrared double-view-field optical lens

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Embodiment Construction

[0012] As shown in the accompanying drawing, the optical lens is made up of two diaphragms and five mirrors. First meniscus positive lens 1, telephoto stop 2, second meniscus negative lens 3, third double concave negative lens 4, short focal stop 5, fourth double convex positive lens 6, fifth meniscus positive lens 7. Imaging on the focal plane 8 of the detector.

[0013] The invention adopts two diaphragm positions of long focus and short focus, and simultaneously realizes the zooming of the double-field infrared optical system by moving the lens group. The system includes a first meniscus positive lens, a short-focus aperture, a second meniscus negative lens, a third double-concave negative lens, a telephoto aperture, and a fourth double-convex positive lens coaxially arranged in sequence from the object space to the image side. , fifth meniscus positive lens and detector focal plane.

[0014] The thermal radiation of the target passes through the first meniscus positive l...

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Abstract

The invention relates to a diaphragm-changeable infrared double-view-field optical lens. A first crescent positive lens, a short-focus diaphragm, a second crescent negative lens, a third biconcave negative lens, a long-focus diaphragm, a fourth biconvex positive lens, a fifth crescent positive lens and a detector focal plane are coaxially arranged in turn from an object space to an image space, wherein the third biconcave negative lens and the fourth biconvex positive lens move between the short-focus diaphragm and the long-focus diaphragm and respectively form a narrow view-field light path and a wide view-field light path. An infrared double-view-field optical system with a large relative aperture is realized.

Description

technical field [0001] The invention relates to an infrared optical lens with a diaphanous bar and an infrared dual-view field, which is suitable for remote monitoring fields such as national defense monitoring, civil monitoring, forest fire prevention, and the like. Background technique [0002] Infrared thermal imaging camera is a high-tech product used to detect the infrared radiation of the target object, and convert the temperature distribution image of the target object into a video image through photoelectric conversion, electrical signal processing and other means. Infrared detection has a certain ability to penetrate smoke, fog, haze, snow and other restrictions and to identify Hefei camouflage. It can realize long-distance and all-weather observation. It is mainly suitable for long-distance monitoring fields such as national defense monitoring, civilian monitoring, and forest fire prevention. [0003] Uncooled thermal imaging cameras are cheap and widely used in ci...

Claims

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Application Information

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IPC IPC(8): G02B13/14G02B13/00G02B7/02G02B7/04G01J5/08
Inventor 赵翠玲马萄
Owner HEBEI HANGUANG HEAVY IND
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