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A method for calculating the center position of collimated light 被引量:2

A method for calculating the center position of collimated light
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摘要 It is a key problem to accurately calculate beam spots' center of measuring the warp by using a collimated laser. A new method, named double geometrical center method (DGCM), is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device (CCD) is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What's more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.
出处 《Optoelectronics Letters》 EI 2008年第2期155-158,共4页 光电子快报(英文版)
基金 the National Natural Science Foundation of China (No. 60337030)
关键词 计算方法 位势 光学 激光 计算方法 位势 光学 激光
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  • 1-.结构专业技术措施[M].北京市建筑设计研究院,1992..

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