Device and method of infrared imaging for active detection of aero-optical effect and real-time compensation of aero-optical effect

An aero-optical and infrared imaging technology, which is applied in measuring devices, optical radiation measurement, radiation pyrometry, etc., can solve the problems of insufficient real-time performance and poor adaptability, and achieve the effect of high-speed real-time infrared aero-optical effect compensation

Inactive Publication Date: 2017-09-08
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology

[0005] Aiming at the problems of poor scene adaptability and insufficient real-time performance in the prior art, the present invention proposes an infrared imaging device and method that actively detects aero-optical effects and compensates them in real time. By sending and receiving laser light passing through the aero-optic effect area, real-time acquisition Distortion parameters of aero-optic effect, obtain distortion point spread function, and use it for image deconvolution to complete real-time image restoration

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] see figure 1 As shown, the embodiment of the present invention provides an infrared imaging device that actively detects aero-optical effects and compensates them in real time. Device 10 and image correction circuit 8 and other parts.

[0025] The laser / infrared co-aperture optical device adopts a reentry optical system for receiving target infrared radiation energy and laser backscattering energy (symbol 2 shows laser / infrared radiation), and the dichroic beam splitter 5 behind the secondary mirror will Laser light is separated from infrared energy. The entrance pupil of the example infrared optical system is D=85mm, the focal length f=170mm, and the field of view is ±1.96°; the entrance pupil of the laser receiving system is D=85mm, the focal length f'=230mm, and the field of view is 0.2865°.

[0026] The dichroic beamsplitter 5 is made of o...

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Abstract

The present invention provides a device and method of infrared imaging for active detection of an aero-optical effect and real-time compensation of an aero-optical effect. A laser / infrared co-aperture device employs a reciprocating-type optical system with a compact structure; the laser and the emission lens of a laser emission device are used at the outer portion of an aero-optical turbulence area to form laser spots; a wavefront photoelectric sensor is configured to receive laser back scattering energy and extract deviation parameters in distortion wavefront; an infrared detector is configured to extract the infrared radiation heat corresponding to target optical waves; and an image correction circuit and a degeneration image compensation method operated on the image correction circuit are configured to receive infrared object original data and aero-optical wavefront distortion deviation parameters and perform single-frame real-time deconvolution operation of the original image data and the deviation parameters to obtain recovered images so as to realize real-time compensation of the aero-optical effect. The scene adaptability is high, and the correction timeliness is high.

Description

technical field [0001] The invention relates to the field of imaging by realizing aero-optical effect compensation through active wavefront detection, installation structure and image processing method. Background technique [0002] Modern aircraft are developing towards high speed and high acceleration, and the aero-optical effect affects the application of optical imaging detection technology on high-speed aircraft. Most of the new generation of high-speed aircraft use infrared imaging terminal guidance system, which has the advantages of high guidance accuracy and automatic target image recognition. When the infrared optical imaging system flies with the aircraft at high speed in the atmosphere, its optical hood and incoming flow A complex flow field is formed between them, causing optical wavefront transmission distortion or transmission interference to the infrared imaging detection system, causing the energy of the light entering the sensor to change, which is reflecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00G01J5/06
CPCG01J5/00G01J5/06G01J2005/0077
Inventor 樊志华郑翰清吴建东谢长生马晓燠
Owner SHANGHAI AEROSPACE CONTROL TECH INST
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