Uncooled double-field-of-view infrared optical system

An infrared optical system, dual field of view technology, applied in the field of optics, can solve the problems of complex optical-mechanical installation and adjustment, and achieve the effects of reducing motion mechanisms, excellent image quality, and simple installation and adjustment

Active Publication Date: 2011-05-18
LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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Problems solved by technology

[0005] The purpose of the present invention is to provide an uncooled dual-field infrared optical system to solve the problem of complex optical-mechanical assembly and adjustment in existing systems

Method used

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  • Uncooled double-field-of-view infrared optical system
  • Uncooled double-field-of-view infrared optical system
  • Uncooled double-field-of-view infrared optical system

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Embodiment Construction

[0009] The uncooled dual-field infrared optical system of the present invention adopts the principle of object-image conjugation, and realizes the optical path switching of the dual-field infrared optical system by moving one lens axially. The system includes 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 negative lens arranged coaxially in sequence from the object side to the image side. and detectors.

[0010] The radiation of the external scene passes through the first lens 1 (meniscus positive lens, material: germanium), the second lens 2 (double concave negative lens, material: germanium), diaphragm 3 (round hole), and the third lens 4 (double convex positive lens). Lens, material: germanium), fourth lens 5 (biconvex positive lens, material: germanium), fifth lens 6 (meniscus negative lens, material: zinc selenide) focus on the focal plane o...

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Abstract

The invention relates to an uncooled double-field-of-view infrared optical system and belongs to the technical field of optics. A first positive meniscus lens, a second double-concave negative lens, a diaphragm, a third double-convex positive lens, a fourth double-convex positive lens, a fifth negative meniscus lens and a detector are coaxially arranged from an object space to an image space, wherein the second double-concave negative lens can axially move between the first lens and the diaphragm to form a narrow-field-of-view light path and a wide-field-of-view light path respectively. The system is provided with two optical fields of view, namely a wide field of view and a narrow field of view, wherein the wide field of view is used for target detection, and the narrow field of view is used for target identification; due to an aspheric design, the double-field-of-view optical system has higher degree of freedom, alternative variables for optimization design are increased, and an optical aberration design is easy to obtain high image quality; and because transformation and focusing compensation of the two fields of view are realized due to movement of the same lens, movement mechanisms in the system are reduced, the rest components in the light path are fixed parts which are easy to assemble and debug, and the assembling and debugging difficulty of the system is reduced greatly.

Description

technical field [0001] The invention relates to an uncooled dual-field infrared optical system, which belongs to the field of optical technology. 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 camouflage, which can realize long-distance and all-weather observation. It is especially suitable for detecting targets at night and under bad weather conditions. [0003] Uncooled thermal imaging cameras are widely used in civilian fields such as electricity, fire protection, industry, medical treatment, and security because they do not require refrigeration and are low in price. Infrared optical system play...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/14G02B13/18G02B13/00G02B7/02G02B7/04G01J5/08
Inventor 张良
Owner LUOYANG INST OF ELECTRO OPTICAL EQUIP OF AVIC
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