A comprehensive non-uniformity correction method for EMCCD

The non-uniformity of image directly affects the application of EMCCD in various disciplines. The proposed method can significantly improve the uniformity of EMCCD output image. The correction algorithm of reverse split and forward recovery is determined through analyzing the imaging model of EMCCD, and the comprehensive non-uniformity correction function model is established. The 8-tap EMCCD chip CCD220 of British e2v company is used for experimental verification. The results show that after the comprehensive correction the consistencies of the light response characteristic curve and the multiplication gain curve of each channel in EMCCD are obviously improved, and also the photo response non-uniformity (PRNU) of the output image is substantially reduced from 24.5 to 4.1%, which prove the effectiveness of the proposed method.

Automated summary

The proposed method aims to improve the uniformity of EMCCD output image by analyzing the imaging model, determining the correction algorithm, and establishing a comprehensive non-uniformity correction function model. Experimental results using the British e2v company's CCD220 chip show significant improvements in consistencies and significant reduction in PRNU, confirming the effectiveness of the method.