Infrared Technology, Volume. 43, Issue 11, 1061(2021)
A Method for Testing Distortion of an Infrared Imaging System
It is necessary to test and analyze the distortion of an infrared imaging system in a laboratory because the ability of the system to play a role on the platform is dependent on the distortion control of an infrared imaging system. We have proposed a method based on a test of sub-pixel precision and precise angle measurement to calculate distortion using centroid difference data. It is laborious to test the distortion of an infrared system with a large field of view using a method which requires the computation of a large number of coordinates of points. Furthermore, the location of the field view could be a problem for the partial distortion method. By using the proposed method, the aforementioned problems can be addressed. We applied the method to evaluate a thermal system and the results were in agreement with those of the simulation software. The error control was less than 0.02%, which can meet the requirement. Moreover, the performance of the system was evaluated to analyze how the distortion affects the ability of the system.
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WANG Yan, GUO Zhemin, LIU Guoping. A Method for Testing Distortion of an Infrared Imaging System[J]. Infrared Technology, 2021, 43(11): 1061