High-accuracy multifunctional wide-spectrum radiation comparison system

Abstract

The high precision multifunctional wide spectrum radiation comparison system comprises the light source, incoming light path, monochrometer, spectral response ratio inspection module and spectral transmission ratio inspection module. It combines detector spectral response ratio, material spectral feature, using grating double monochromator DK242 and standard detector based on low temperature radiometer delivered information, realizing optical sensor and material high precision spectral feature inspection using special light path design. It solves the analytical contradiction well, effectively improves the inspection precision. It finds that the uncertainty level of the system is 10-3-10-4. It provides convincing theoretical reference and testing instrument for all kinds of sensor calibration and material spectral feature analysis.

Description

technical field [0001] The invention belongs to the research and design of optical radiation calibration and measuring instruments, in particular to the research and design of a system device for calibration of high-precision relative spectral responsivity and measurement of material spectral transmittance. Background technique [0002] At present, the calibration of optical radiation sensors generally adopts two methods, which are respectively established on standard radiation sources and standard detectors. What they have in common is that firstly, a high-precision primary standard needs to be established, and then standards with different accuracy levels should be established. From the transmission chain to the user sensor, the calibration is actually a step-by-step comparison process. [0003] The black body with temperature precision control is usually used as the primary standard radiation source, and its absolute irradiance can be determined according to Planck's radi...

AI Technical Summary

Problems solved by technology

But now there are many detectors that are channel detectors. If the overall calibration accuracy is to be improved, the calibration of the spectroscopic device is very important. Therefore, many countries design many kinds of instruments to measure the characteristics of various spectroscopic devices (such as spectral transmission) rate, reflectivity, etc.), resulting in a large number of instruments and devices involved in the calibration of the channel detector, and the measurement cost increases. However, these devices are often complicated to operate, and the sources of uncertainty are scattered and intricate, making it difficult to accurately evaluate the overall system uncertainty

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