Self-calibrated light source spectrum tuner

Abstract

The invention discloses a self-calibrated light source spectrum tuner, relates to the field of light radiation measurement, and solves the problem that a chromatic-dispersion subtracted type spectrum tuner which considers the characteristics of both wide band and narrow band is does not exist at present. The light of the light source of the tuner is focused in an entrance slit through a front-end optical system; incident light is collimated into parallel light through a first concave mirror, is fed into a first plane grating, is subjected to chromatic dispersion through the first plane grating, and is subsequently further focused on the surface of a digital micro-mirror device through the first concave mirror so as to form spectrum; reflected light which is reflected through the digital micro-mirror device is collimated through a second concave mirror, is subsequently subjected to chromatic dispersion through a second plane grating, and is further focused on an exit slit through the second concave mirror so as to form output light. According to the self-calibrated light source spectrum tuner disclosed by the invention, two working modes of the narrow band and the wide band are provided for a self-calibrated light source, so that the light source has the advantages of light sources of the narrow band and the wide band, the light intensity of the light source can be changed independently according to demands, the stray light of the spectrum of the self-calibrated light source is reduced, and the requirements of calibration in real atmosphere spectrum amplitude brightness are met.

Description

technical field [0001] The invention relates to the technical field of optical radiation measurement, in particular to a self-calibrating light source spectrum tuner. Background technique [0002] In the past one or two decades, radiometric testing technology has developed very rapidly. Some industrially advanced countries such as the United States, the United Kingdom, and Germany have successively established synchrotron radiation spectral radiation standards on the basis of blackbody spectral radiation standards, and developed spectral irradiance Spectral irradiance and spectral radiance transfer standards such as standard quartz-halogen tungsten lamps and light integrating spheres belong to broadband light sources, and based on low-temperature radiometers, new detector standards have been established, and lasers based on standard detectors have been developed. The light source type spectral irradiance and spectral radiance responsivity calibration source is a narrow-band ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that there is no dispersion subtraction spectral tuner that takes into account both broadband and narrowband characteristics, the present invention provides a self-calibrating light source spectral tuner that can be used to transfer standard light sources based on standard detector calibration

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