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.

© 2014 Optical Society of America

Circular–linear grating Talbot interferometry with moiré Fresnel imaging for beam collimation

Krzysztof Patorski, Krzysztof Pokorski, and Maciej Trusiak
Opt. Lett. 39(2) 291-294 (2014)

MSE-based analysis of circular grating self-images for testing beam collimation

Shivangi Bande, Vimal Bhatia, and Shashi Prakash
Appl. Opt. 59(24) 7160-7168 (2020)

Collimation technique and testing applied to finite size polychromatic sources

Francisco Jose Torcal-Milla and Luis Miguel Sanchez-Brea
Appl. Opt. 56(12) 3628-3633 (2017)

Self-imaging-based laser collimation testing technique

Asloob A. Mudassar and Saira Butt
Appl. Opt. 49(31) 6057-6062 (2010)

Automated collimation testing by determining the statistical correlation coefficient of Talbot self-images

Santosh Rana, Jitendra Dhanotia, Vimal Bhatia, and Shashi Prakash
Appl. Opt. 57(10) 2686-2692 (2018)