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Angle determination based on the deflection of a laser beam

The angle measurement method described here measures the difference in arrival time to a detector of a light beam reflected by a surface being measured and a reference ray. This measurement is made by alternately detecting both rays with a photodetector at the focal plane of a lens and electronicall...

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Published in:Review of scientific instruments 2000-08, Vol.71 (8), p.3226-3230
Main Authors: López-Ramı́rez, Juan Manuel, Malacara-Doblado, Daniel, Malacara-Hernández, Daniel
Format: Article
Language:English
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description The angle measurement method described here measures the difference in arrival time to a detector of a light beam reflected by a surface being measured and a reference ray. This measurement is made by alternately detecting both rays with a photodetector at the focal plane of a lens and electronically obtaining their arrival time difference. With this information, and reading the slopes along a straight line, the profile of a reflecting surface can be found.
doi_str_mv 10.1063/1.1304861
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title Angle determination based on the deflection of a laser beam
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