Imaging spectrometer radiation parameter and imaging parameter calibration device and method

Abstract

The invention provides a visible near-infrared imaging spectrometer radiation parameter and imaging parameter calibration device and method. The calibration device and method use a high-stability large-caliber standard integrating sphere light source with a target interface to be combined with a large-caliber collimator to form collimation radiation which is received by a measured visible near-infrared imaging spectrometer. A standard spectroradiometer calibrated by a spectral radiance standard lamp calibrates the spectral radiance of the exit of the integrating sphere light source and the collimation radiation respectively, so as to achieve full-band radiance high-accuracy calibration of the visible near-infrared imaging spectrometer of a camera system and a telescope system. The measuredvisible near-infrared imaging spectrometer is used to image a series of standard targets mounted on the target interface of the large-caliber standard integrating sphere light source, so as to realize imaging parameter calibration of the measured imaging spectrometer.

Description

technical field [0001] The invention belongs to the field of optical metrology and testing, and relates to a calibration device and method for radiation parameters and imaging parameters, in particular to a high-accuracy calibration device and method for radiation parameters and imaging parameters of a visible-to-near-infrared imaging spectrometer. Background technique [0002] Imaging spectrometers are used to detect, identify and distinguish targets and backgrounds. They are a new generation of advanced military optical reconnaissance systems with "integration of images and spectra", including various multi-spectral and hyperspectral imaging spectrometers from near ultraviolet to far infrared. Imaging spectrometers mainly include dispersion imaging spectrometers (including prism and grating two spectroscopic modes), AOTF tunable acousto-optic imaging spectrometers, and interference imaging spectrometers according to their spectroscopic principles; currently, there are mainl...

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Problems solved by technology

[0006] Aiming at the problem that the radiation parameters and imaging parameters of the visible near-infrared imaging spectrometer cannot be calibrated with high accuracy in the prior art, the present invention proposes a device and method for calibrating the radiation parameters and imaging parameters of the visible-near-infrared imaging spectrometer, specifically In other words, the calibration device and method utilizes a highly stable large-diameter standard integrating sphere light source with a target interface combined with a large-diameter collimator to form collimated radiation, which is received by the measured visible to near-infrared imaging spectrometer, and is measured by the spectral radiance standard The standard spectroradiometer that has been calibrated by the lamp is used to calibrate the spectral radiance of the light source outlet of the integrating sphere and the collimated radiation, so as to realize the high-accuracy determination of the full-band radiance of the visible to near-infrared imaging spectrometer with a camera system and a telescopic system. mark

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