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Self-imaging technique for beam collimation
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DOI：10.1364/OL.39.005764.png)
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Abstract
En 中文
A simple collimation technique based on measuring the period of one self-image produced by a diffraction grating is proposed. Transversal displacement of the grating is not required, and then automatic single-frame processing can be performed. The self-image is acquired with a CMOS camera, and the period is computed using the variogram function. Analytical and experimental results are obtained, which show the simplicity and accuracy of the proposed technique. (C) 2014 Optical Society of America
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