Near-ultraviolet to near-infrared spectroradiometer and its calibration method and method for measuring spectral radiance of integrating sphere light source

Abstract

The invention proposes a near-ultraviolet to near-infrared spectroradiometer and its calibration method and a method for measuring the spectral radiance of an integrating sphere light source. The spectroradiometer adopts a small field of view design, and the field of view matches the spectral radiance standard lamp tungsten strip. Effectively deduct the influence of the background on the calibration results, so that the light source of the integrating sphere and the standard lamp of spectral radiance have exactly the same measurement field of view, and the integration of the standard lamp of spectral radiance can be realized under the same conditions of measurement field of view, wavelength range and wavelength resolution The calibration of the spectral radiance of the spherical light source improves the calibration accuracy. In the present invention, the metal reflector with a circular hole in the CCD aiming system is 450° from the incident light beam, and the light reflected from the front of the metal reflector enters the aiming system, and the focal length of the optical system is fine-tuned, so that the black spot formed on the CCD by the circular hole is aligned with the measured light source At the imaging center on the CCD, the test light path adjustment of the spectroradiometer to measure the light source under test is completed. At the same time, the circular hole acts as a limiting diaphragm, which can eliminate stray light and improve the signal-to-noise ratio of the spectroradiometer.

Description

Technical field [0001] The present invention belongs to the field of optical measuring test, involving a near-ultraviolet to near infrared spectral radiation meter and its scaling method, and more particularly to a near-ultraviolet to near infrared spectrum meter for measuring the brightness of integral ball light spectrum radiation. Method. Background technique [0002] With the development of space remote sensing technology, UV, it is visible, infrared remote sensing is important in terms of atmospheric physics, environmental science, meteorology, target / background information. In the field of atmospheric environment monitoring, the spatial remote sensing spectral radiometer has an irreplaceable role. As the accuracy of the increasing growth of the atmospheric environment, the accuracy of the spectral radiometer has also proposed a non-general request. [0003] Spectrum radiation gauges include all types of spectral radiation gauges from ultraviolet infrared infrared, and spe...

AI Technical Summary

Problems solved by technology

The measurement uncertainties of the above two methods are large, and cannot meet the high-accuracy measurement requirements of the integrating sphere light source spectral radiance measurement uncertainty better than 5%.

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