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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 9, Iss. 9 — Sep. 10, 2011
  • pp: 091201–

Robust CCD photoelectric autocollimator for outdoor use

Min Gao, Zuoren Dong, Zhenglan Bian, Qing Ye, Zujie Fang, and Ronghui Qu  »View Author Affiliations


Chinese Optics Letters, Vol. 9, Issue 9, pp. 091201- (2011)


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Abstract

A robust charge-coupled device (CCD) photoelectric autocollimator for outdoor use is designed and demonstrated. The influence of outdoor conditions on the signal-to-noise ratio (SNR) and imaging quality of the measuring system is experimentally analyzed. The pulse width modulation technology is applied to the automatic feedback control of the actively regulated illuminating light source of the measuring system to maximize SNR while avoiding image saturation. A Fourier phase shift method for subpixel estimation is adopted to achieve high-accuracy measurement in the presence of noises. Experimental results indicate that the technologies proposed here largely improve the measuring stability, dynamic range, and accuracy of the CCD photoelectric autocollimator used outdoors.

© 2011 Chinese Optics Letters

OCIS Codes
(100.0100) Image processing : Image processing
(100.2650) Image processing : Fringe analysis
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.1680) Instrumentation, measurement, and metrology : Collimation

Citation
Min Gao, Zuoren Dong, Zhenglan Bian, Qing Ye, Zujie Fang, and Ronghui Qu, "Robust CCD photoelectric autocollimator for outdoor use," Chin. Opt. Lett. 9, 091201- (2011)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-9-9-091201


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