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《ACTA OPTICA SINICA》 1999-01
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Study on Accurate Phase Demodulating of Phase Approaching of Projected Grating Used in 3D Detection

You Zhifu Zhong Yuexian Yuan Chaolong Xu Qinghong Cao Qixiang (Mechanical Department, Tsinghua University, Beijing 100084)  
The problems are analysed in practical 3D detection by phase approaching of projected grating that frequency moving in frequency domain and the correspondence between measured surface and reference plane have great effect on the accuracy of phase demodulating. An appropriate method for avoiding frequency moving and a new concept of full field reference plane are proposed. Their perfect perfomance has been verified.
【CateGory Index】: O439,O436
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