Fast focus ratio reflective long-wave infrared viewfinder optical system based on free-form surface

A long-wave infrared, optical system technology, applied in optics, optical components, instruments, etc., can solve the problem of chromatic aberration correction and high cost, and achieve the effect of simple structure, large pupil diameter, and wide field of view

Inactive Publication Date: 2018-11-02
苏州晶煊光电有限公司
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Problems solved by technology

[0003] Purpose of the invention: The purpose of the present invention is to solve the problem of the need to correct chromatic aberra...

Method used

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  • Fast focus ratio reflective long-wave infrared viewfinder optical system based on free-form surface
  • Fast focus ratio reflective long-wave infrared viewfinder optical system based on free-form surface
  • Fast focus ratio reflective long-wave infrared viewfinder optical system based on free-form surface

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Embodiment

[0031] A long-wave infrared viewfinder optical system based on a free-form surface with a fast focal ratio, comprising a first free-form reflector 2 , a second free-form reflector 3 and a long-wave infrared responsive surface array detector 4 . combine figure 1 , the light starts from the external entrance pupil 1 , is reflected by the first free-form surface reflector 2 , and reaches the second free-form surface reflector 3 . After being reflected by the second free-form surface reflector 3 , it finally reaches the long-wave infrared response surface array detector 4 .

[0032] The optical system of the reflective long-wave infrared viewfinder with fast focal ratio based on the optical free-form surface, the size of the long-wave infrared response area array detector 4 is 12×8mm 2 , the total number of pixels is 480×320, and the size of a single pixel is 25 microns.

[0033] The fast focal ratio reflective long-wave infrared finder optical system based on the optical free-f...

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Abstract

The invention discloses a fast focus ratio reflective long-wave infrared viewfinder optical system based on a free-form surface. The system comprises two free-form surface reflectors and a long-wave infrared response area array detector. The light passes through an external entrance pupil and passes through the two free-form surface reflectors in turn to reach the long-wave infrared response areaarray detector. An off-axis two-reflex optical system designed for a viewfinder optical system in the prior art can only be utilized in the visible light range, the F number is relatively large, the off-axis two-reflex optical system cannot be applied to the long-wave infrared band, and fast focus ratio high performance requirements cannot be satisfied. The system is advantaged in that high flux,high resolution, compact structure and the wide band can be realized, and a fast focus ratio reflective long-wave infrared viewfinder based on the optical free-form surface can realize target detection and monitoring in the low-light or nighttime complex environments.

Description

technical field [0001] The invention relates to the technical field of optical system and device design, in particular to a fast focal ratio reflective long-wave infrared viewfinder optical system based on an optical free-form surface, which is suitable for target detection and monitoring in dim light or complex environments at night. Background technique [0002] In infrared imaging optical systems, especially those involving wide-band and long-wave infrared optical systems, if the design method of transmission optical elements is adopted, the lens materials used, such as germanium, zinc sulfide or zinc selenide, are expensive and difficult to manufacture. However, a reflective design approach can realize low-cost, high-performance broadband infrared optical systems that do not need to correct for chromatic aberration. Among them, the reflective long-wave infrared viewfinder plays an important role in target detection and monitoring in low light or complex nighttime environ...

Claims

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Application Information

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IPC IPC(8): G02B17/06
CPCG02B17/0621
Inventor 叶井飞宋真真杨明珠裴世鑫陈云云赖敏丁家奎徐凯迪唐靖吴玉泽
Owner 苏州晶煊光电有限公司
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