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Basic Requirement for Measurement System in FTP

Chen Wenjing Su Xianyu Tan Songxin (Dept.of Opto electronics,Sichun University,Chengdu 610064)  
In this paper,we discussed the basic requirement for measurement system to avoid shadows and th frequency alias in a crossed optical axes system in FTP.The maximum range of measurement can be extended by employing a geometry with a smaller included angle between axis of the projection and the detection system;In order to eliminate the errors resulting from the smaller included angle,we project a dense grating image onto a object and record the deformed fringe with a high resolution CCD to prevent frequency alias.Computer simulations have proved our analysis.
【Fund】: 国家自然科学基金!(69827001)
【CateGory Index】: O438
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