Self-imaging technique for beam collimation

Sánchez Brea, Luis Miguel; Torcal Milla, Francisco José; Herrera Fernández, José María; Morlanes, Tomás; Bernabeu Martínez, Eusebio

Self-imaging technique for beam collimation

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Official URL

http://dx.doi.org/10.1364/OL.39.005764

Publication date

2014

Authors

Sánchez Brea, Luis Miguel

Torcal Milla, Francisco José

Herrera Fernández, José María

Morlanes, Tomás

Bernabeu Martínez, Eusebio

Publisher

Optical Society of America

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URI

https://hdl.handle.net/20.500.14352/35040

Citation

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Abstract

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.

Description

© 2014 Optical Society of America. The authors thank to Jose Luis Vilas for his valuable comments. This work has been supported by the Ministry of Science and Innovation of Spain (project DPI2011-27851) and project Art. 83 LOU "Estudio de tecnologia para la realizacion de codificadores opticos de 2 mu m de periodo" with Fagor Automation S. Coop.