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Proceedings Paper

Nonuniformity soft correction algorithm for four-quadrant detector
Author(s): Liping Dang; Junhua Liu
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Paper Abstract

The effect which photoelectric response non uniformity of four-quadrant detector used in target tracking act on the output characteristic linearity and tracking location accuracy is quantitatively analyzed, then a lower limit value of detector non uniformity must corrected is put forward, last a new method of multiple correcting non uniformity caused by differences of dark current, channel gain and photoelectric response between quadrants of detector is presented here. Based on compensation of light distribution, a linear fitting soft correction algorithm is applied to each quadrant photoelectric response in two-dimensions coordinate of detector by turns, this intelligent self correction method can control the non-linear error to 5% and tracking location accuracy to 2%. Compared to hardware correction of gain compensated and soft correction method that doesn't eliminate dark current it decreased the non-linear error 2%, and increased location accuracy near 3%.

Paper Details

Date Published: 23 February 2006
PDF: 6 pages
Proc. SPIE 6150, 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 61502S (23 February 2006); doi: 10.1117/12.676946
Show Author Affiliations
Liping Dang, Xian Jiaotong Univ. (China)
SINCON Group (China)
Junhua Liu, Xian Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 6150:
2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment
Xun Hou; Jiahu Yuan; James C. Wyant; Hexin Wang; Sen Han, Editor(s)

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