Quasi-real-time spatiotemporal hybrid modulation infrared interferometric spectroscopy imaging system, method and application

Abstract

The invention discloses a quasi real-time space time mixed modulation infrared interference spectrum imaging system, method and application. According to the system, an infrared thermal radiation signal reaches a scanning mirror 3 through an infrared optical window 1, a time modulation signal is generated, the time modulation signal goes through a space modulation interference tool 4, time and space mixed modulation imaging interferometry are generated at the same time, optical lights are gathered and collected through a Fourier lens 15, the optical signals enter into a detector assembly 6 and then an electrical signal is outputted, the electrical signal goes through a high-speed image processing circuit 7 and an infrared image sequence is imaged, the sequence is inputted to a CUDA architecture parallel computer 9 through a digital image data interface 8, an interference data cube is formed, the interference data cube goes through a data cube and is converted through a parallel fast Fourier transform algorithm 10, and information is displayed on an image display 14 after processing. The imaging system has no slit, the luminous flux is large, and the automatic interference signal acquisition and quasi real-time imaging spectroscopy gas detection can be realized.

Description

technical field [0001] The invention relates to the technical field of infrared interference spectrum imaging, in particular to a quasi-real-time space-time mixed modulation infrared interference spectrum imaging system, method and application. Background technique [0002] Infrared spectrum detection technology is to use instruments to observe targets at a distance. It is a highly automated monitoring method that can collect infrared spectrum radiation information, identify, analyze, and judge without directly contacting the target. [0003] At present, the mainstream spectrometers in the market are mainly divided into two categories: imaging spectrometers and non-imaging spectrometers. [0004] Non-imaging spectrometers mainly use unit detectors. It has the advantages of high spectral resolution, long telemetry distance, and accurate analysis results. However, traditional spectrometers cannot display the diffusion flow direction and distribution range of gas in terms of ...

AI Technical Summary

Problems solved by technology

[0008] The Chinese patent with the application number CN201410086329.4 discloses a space-time joint modulation infrared imaging spectrometer based on multi-level micro-mirrors, which relates to the field of imaging spectrum detection technology. The technical problem of low luminous flux in spatially modulated interferometric imaging spectroscopy technology, including front imaging system, beam splitter, flat mirror, multi-stage micro mirror, rear imaging system and area array detector; the target beam is imaged by the front The system is incident on the beam splitter and divided into two beams. One beam of light is reflected by the beam splitter and imaged on the plane mirror as the first image point. Surface imaging is the second image point; the light emitted by the first image point and the second image point are respectively transmitted and reflected by the beam splitter and then incident to the rear imaging system for imaging, and the focal plane detector receives imaging information; the The patented optical path realizes spatial modulation, but the time modulation is completed by the platform movement, which cannot realize independent interference information collection

No real-time information processing method is proposed

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