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Proceedings Paper

Calibration method with separation patterns of a single-camera
Author(s): Weimin Li; Jiaru Chu; Hao Meng; Jianping Wang; Xiaofeng Li; Xiaozheng Xing
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Paper Abstract

Such as in LAMOST (Large Sky Area Multi-Object Fiber Spectroscopy Telescope), many photometric measurement systems need to reach sub-pixel accuracy with area scan CCD camera. The separation patterns are used to calibrate a single-camera with high precision. Several separation calibration patterns with small size are put on the position of object plane of the camera. Each pattern has some spot array with high precision. The position of each reference point on the image plane of the camera is calculated. The coordinates of the reference points on the calibration patterns are used to calibrate the camera. The curved-surface fitting method is applied to fit the perspective relationship between the object plane and the image plane. The integer pattern with large dimension can be replaced by the several small differential patterns in the situation of large field. The difficulty to manufacture the large pattern is avoided. The experimental results show that the mean value of residual error is less than 0.002mm with the separation calibration method.

Paper Details

Date Published: 28 June 2006
PDF: 10 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62695I (28 June 2006); doi: 10.1117/12.662268
Show Author Affiliations
Weimin Li, Univ. of Science and Technology of China (China)
Jiaru Chu, Univ. of Science and Technology of China (China)
Hao Meng, Univ. of Science and Technology of China (China)
Jianping Wang, Univ. of Science and Technology of China (China)
Xiaofeng Li, Univ. of Science and Technology of China (China)
Xiaozheng Xing, Univ. of Science and Technology of China (China)


Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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