A small reflective off-axis telemetry calibration system for FTIR front ends
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A calibration system, reflective technology, applied in measurement devices, color/spectral characteristic measurement, instruments, etc., can solve problems such as low energy utilization, and achieve the effect of reducing volume and weight, high energy utilization, and fast speed
Active Publication Date: 2022-01-25
中船重工安谱(湖北)仪器有限公司
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[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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[0031] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0032] The optical path of the telemetry calibration system at the front end of the FTIR is as follows: figure 1 shown. The system includes a window 1 , a first off-axis parabolic mirror 2 , a plane mirror 3 , a second off-axis parabolic mirror 4 , a third off-axis parabolic mirror 5 , a blackbody 6 and an FTIR spectrometer 7 .
[0033] The window 1, the first off-axis parabolic reflector 2, the plane reflector 3 and the second off-axis parabolic reflector 4 are sequentially combined into a telephoto optical path; the window 1 is installed in front of the first off-axis parabolic reflector 2 , the plane mirror 3 and the off-axis parabolic mirror 2 are located on the same optical axis, which is the first optical axis; the second off-axis parabolic mirror 4 and the plane mirror 3 are located on the same optical axis, which is the second optical axis; The f...
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Abstract
The invention discloses a small reflective off-axis telemetry calibration system for FTIR front end, comprising a window plate, a first off-axis parabolic reflector, a plane reflector, a second off-axis parabolic reflector, and a third off-axis parabolic reflector mirror, black body, FTIR spectrometer, vertical turntable bearing, mirror tube, top cover and horizontal turntable bearing. The present invention adopts the off-axis reflective telescopic optical path, and compared with the cassette telescope commonly used in FTIR telemetry, there is no aperture obstruction, and the energy utilization rate is higher, which can effectively improve the detection limit of passive telemetry; the spatial layout is adopted, and the instrument is 360° horizontal , When scanning at 60° pitch, only the telescopic objective lens needs to be rotated and pitched, and the scanning is flexible and fast; the FTIR spectrometer remains stationary, and the measurement stability is better; the volume and weight are reduced, the shock resistance is improved, and it is more practical for vehicles , Airborne; the telephoto optical path and the black body calibration optical path are carried out in time, and the off-axis design adopted can effectively improve the energy utilization rate of passive telemetry.
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 used for the front end of FTIR. Background technique [0002] Fourier Transform Infrared (FTIR) technology has been widely used in the monitoring of toxic and harmful gases and chemical warfare agents. and the primary means of monitoring chemical warfare agents. Passive remote sensing technology uses the emission of the object to be measured or its absorption of sunlight or moonlight to perform qualitative or quantitative determination of the components to be measured. Therefore, this technology has the advantages of mobility, flexibility, fast and easy operation. In FTIR passive remote sensing, the absolute radiation value of the target object is measured, but the instrument displays the relative value of the radiation amount, which requires radiation calibration and correction before and durin...
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