Small reflective off-axis telemetry calibration system for FTIR front end

Abstract

The invention discloses a small reflective off-axis telemetry calibration system for an FTIR front end. The small reflective off-axis telemetry calibration system comprises a diaphragm, a first off-axis parabolic mirror, a plane mirror, a second off-axis parabolic mirror, a third off-axis parabolic mirror, a black body, an FTIR spectrometer, a vertical turntable bearing, a lens cone, a top cover and a horizontal turntable bearing. The off-axis reflection type telescopic light path is adopted, compared with a common cassette telescope for FTIR telemetry, aperture blocking does not exist, the energy utilization rate is higher, and the detection limit of passive telemetry can be effectively improved; spatial layout is adopted, only the telescope objective is required to rotate and pitch when the instrument is used for 360-degree horizontal and 60-degree pitch scanning, the scanning is flexible, and the speed is high; the FTIR spectrometer is kept still, and the measurement stability is better; the size and the weight are reduced, the shock resistance is improved, and the system is better applied to vehicle-mounted and airborne conditions; the telescopic optical path and the black body calibration optical path are carried out in a time-sharing manner, and the off-axis design is adopted, so that the energy utilization rate of passive remote measurement can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of optical trace detection, and in particular relates to a small reflective off-axis telemetry calibration system for an FTIR front end. Background technique [0002] Fourier Transform Infrared (FTIR) technology has been widely used in the monitoring of toxic and harmful gases and chemical warfare agents. It can be used for rapid and continuous online monitoring, as well as simultaneous monitoring of multi-component gases. It has gradually become a toxic and harmful gas in the atmospheric environment. and the main means of chemical warfare agent monitoring. Passive remote sensing technology utilizes the emission of the object to be measured or its absorption of sunlight or lunar light to qualitatively or quantitatively determine the components to be measured, so the technology has the advantages of mobility, flexibility, fast and easy operation. In FTIR passive remote sensing, the absolute radiation value o...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a small reflective off-axis telemetry calibration system for the front end of FTIR, which can improve the problem of low energy utilization when the radiation of the FTIR front-end telephoto optical path and the blackbody calibration optical path all enter the FTIR spectrometer

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