Robust CCD photoelectric autocollimator for outdoor use

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 appl...

Full description

Saved in:

Bibliographic Details
Published in:	Chinese optics letters Vol. 9; no. 9; pp. 32 - 36
Main Author:	高敏董作人卞正兰叶青方祖捷瞿荣辉
Format:	Journal Article
Language:	English
Published:	10-09-2011
Subjects:	CCD 信号噪声比光电自准直仪实验分析户外使用测量系统电荷耦合器件脉冲宽度调制技术
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	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.
Bibliography:	31-1890/O3 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. Min Gao , Zuoren Dong , Zhenglan Bian, Qing Ye , Zujie Fang , Ronghui Qu （1Shanghai Key Laboratory of All Solid-state Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;2 Craduate University of Chinese Academy of Sciences, Beifing 100049, China）
ISSN:	1671-7694
DOI:	10.3788/COL201109.091201