Infrared spectral radiometric calibration system

Abstract

This invention discloses one infrared light spectrum scaling system based on detector, wherein, the light source and single color device incidence seam are fixed with wave trop device; the single color device inside is fixed with grating from exit seam into light shield box through two axis arc lens and filter slices to detector and scaling detector. This invention adopts Newport company infrared light source and Acton Research single color machine to realize light spectrum response test volume of 1 mum-12 mum.

Description

technical field [0001] The invention belongs to an optical radiation calibration instrument, in particular to the design of a detector-based high-precision infrared spectrum radiation calibration system. Background technique [0002] At present, two methods are generally used for the calibration of spaceborne infrared sensors, namely, the calibration method based on the radiation source and the calibration method based on the detector. The calibration process is shown in Figure 1. [0003] The spectral radiation of black body radiation conforms to Planck's black body radiation law, that is, the black body radiation flux with known thermodynamic temperature can be calculated by Planck's formula, so the spectral radiation flux and spectral radiance standard of black body can be obtained from the temperature standard. The biggest uncertainty of this method comes from the measurement of temperature, but in the actual operation process, the temperature is difficult to control, th...

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Problems solved by technology

The biggest uncertainty of this method comes from the measurement of temperature, but in the actual operation process, the temperature is difficult to control, the temperature distribution uniformity is very poor, the emissivity of the black body surface is uneven, and the long-term stability is poor, which leads to the low accuracy of the primary standard. In addition, the standard transmission process is difficult to guarantee high accuracy, and the uncertainty of the transmission chain is often higher than 5% when it reaches the spaceborne sensor, which is difficult to meet the requirements of quantitative remote sensing for high-precision radiometric calibration

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