Subdivision spectral scanning calibration device based on supercontinuum laser and monochromator

Abstract

The invention discloses a subdivision spectral scanning calibration device based on a supercontinuum laser and a monochromator. The device uses the supercontinuum laser as a lighting source of the monochromator and couples the supercontinuum laser into the monochromator. The monochromator is tuned to output monochromatic light, a part of light energy is reflected by the surface of a beam splitterand then enters a laser wavelength meter after the alignment, focusing and beam splitting, and so real-time monitoring of output wavelength and bandwidth can be realized. The remaining part enters a decoherence integrating sphere through the beam splitter to produce uniform a monochromatic surface light source. The absolute spectral radiance of the integrating sphere is obtained by a standard radiance detector traceable to a cryogenic absolute radiometer, Alternate measurement of the standard radiance detector and to-be-calibrated equipment can be realized through a linear displacement platform, the monochromator is sequentially tuned to output monochromatic light of different wavelengths, and so the spectral subdivision scanning calibration of the to-be-calibrated equipment can be realized. The device has wide application prospects in optical radiation measurement and high precision calibration of remote sensors.

Description

technical field [0001] The invention relates to the technical field of optical radiation measurement and remote sensor calibration, in particular to a subdivision spectrum scanning calibration device based on a supercontinuum laser and a monochromator. Background technique [0002] Tracing back to the cryogenic absolute radiometer, the radiation transfer link based on the standard detector is a high-precision radiation calibration technology link recognized by the industry at this stage. The absolute spectral power responsivity of the standard transfer detector can be obtained by using a low temperature absolute radiometer, and the spectral radiance responsivity can be obtained from the spectral power responsivity by using a radiance geometric conversion structure (such as the Gershun tube form), realizing the traceability of the spectral radiance to the highest Precision optical power primary reference. [0003] The cryogenic absolute radiometer is recognized as the most a...

AI Technical Summary

Problems solved by technology

In addition, the operation of the laser has high requirements on the environment, such as cleanliness, indoor temperature and humidity, etc., and the operation and maintenance of the laser also need to be carried out by professionals.

These objective factors lead to the concentration of spectral scanning calibration technology based on tunable lasers in professional and powerful metrology laboratories, which is not conducive to the popularization and application of this high-precision calibration technology

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