Real-time Fourier infrared spectrum radiation measurement system and measurement method

Abstract

The invention discloses a real-time Fourier infrared spectrum radiation measurement system and a real-time Fourier infrared spectrum radiation measurement method. The measurement system comprises a telescopic observation module, an optical module, a motor driving module, a detection and acquisition module, a data processing module and a main control module, the measurement method comprises the following steps: after target infrared radiation is converged and collected by the telescopic observation module, under the action of the motor driving module, the optical module performs interference modulation on the target infrared radiation to complete interference light splitting, the target infrared radiation enters the detection and acquisition module after being converged to complete photoelectric conversion and digital sampling, and then real-time spectrum inversion is completed through the data processing module; and finally, entering the master control module for series processing to complete real-time measurement of the target infrared radiation parameters. According to the measurement system and the measurement method, high-sensitivity, broadband and high-resolution real-time infrared spectrum radiation parameter acquisition is realized, and elimination of external interference factors such as environmental background and instrument radiation is realized.

Description

technical field [0001] The invention relates to the field of infrared radiation measurement, in particular to a real-time Fourier transform infrared spectrum radiation measurement system and a measurement method. Background technique [0002] Fourier spectral measurement technology has the advantages of high spectral resolution, high luminous flux, multi-channel, wide spectral coverage, etc. It is a very important high-resolution spectral analysis technology. In particular, broadband infrared spectral radiation measurement has been widely used in space remote sensing, target characteristic research, atmospheric detection, material analysis, security and chemical defense, metrology, laboratory, environment, medical treatment and other fields. With the rapid development of infrared stealth technology and hypersonic technology, there is an urgent need for high-sensitivity real-time infrared spectral radiation parameter measurement of low-radiation and fast-flashing targets. ...

AI Technical Summary

Problems solved by technology

[0003] Although traditional infrared spectroradiometric measurement systems based on the principles of prism, grating spectroscopic, and filter types can achieve fast measurement speeds, they have disadvantages such as poor detection sensitivity, poor spectral resolution, and insufficient wide-band coverage.

Although the existing Fourier-based infrared spectroradiometric measurement system has good spectral resolution and detection sensitivity, it has disadvantages such as slow measurement speed.

Although a time-resolved Fourier spectrum analyzer has appeared for the research needs of transient characteristics in the fields of biochemistry and other fields, its repeated trigger-sampling principle can achieve microsecond or even better time resolution, that is, to resolve microseconds. Transient state changes in even shorter time intervals, but it is extremely time-consuming and labor-intensive to complete a single wide-band spectral parameter measurement. Obviously, this scheme is not suitable for infrared spectral radiation parameter measurement in occasions such as low radiation and fast flashing targets.

[0004] In addition, external factors such as the environmental background and the radiation of the instrument itself have a significant impact on the measurement of the infrared spectral radiation characteristics of the target, especially for low-radiation targets and other test occasions.

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