Abstract
A new infrared radiation calibration method based on lens cover deduction of internal stray radiation is proposed to address the issue of grayscale deviation of infrared radiation measurement systems caused by environmental temperature changes, which leads to the failure of the traditional infrared radiation calibration method. Firstly, the influence of environmental temperature on the traditional radiation calibration was analyzed. Then, a mathematical model for infrared radiation calibration based on lens cover deducting internal stray radiation was established, and compared the environmental adaptability with the traditional radiation calibration. Finally, the experimental results show that this method has the ability to enhance the environmental adaptability of infrared radiation measurement systems, improve the accuracy of infrared radiation measurement, and especially for the optical system with high attenuation attenuator, the calibration coefficient can achieve the same environmental adaptability as that for the 100% transmittance attenuator. The environmental adaptability of the calibration coefficient is also greatly better than the traditional calibration for the 100% transmittance attenuator.
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