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《Journal of Optoelectronics.laser》 2002-09
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The Study of a Kind of Calibration Algorithm of Undecided Step Phase-shiftings

GAO Cheng yong, WANG Yun shan, SI Shu chun, XU Jian qiang (College of Physics and Micro electronics,Shandong University,Jinan 250061,China)  
The traditional calculation algorithm of N steps requires precise phase shifting equipment to reslize the decided steps.It can not exactly calculate the phase when there is an error in each step of the moving of the project grating.Base on this,a new calculation algorithm of undecided steps of phase shifting is presented.The new algorithm can exactly calculate the phase,reduce the requirement of the phase shifting equipment,enhance the precision and the automatic degree of the measurement system.
【CateGory Index】: TN247
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