RT Journal Article
T1 Lissajous figure-based single-frame collimation technique
A1 Torcal Milla, Francisco José
A1 Sánchez Brea, Luis Miguel
A1 Herrera Fernández, José María
AB An accurate collimation technique based on a double grating system is proposed. Transversal displacement of the grating is not required and then, automatic single-frame processing can be performed. Talbot self-images are projected onto a mask composed by several shifted diffraction gratings. A Lissajous figure is obtained with the signals acquired by a CMOS camera where the mask is simulated by software. The collimation degree is determined by measuring the ellipticity of the Lissajous figure. Visual or automatic procedures for simple and accurate collimation of a light source are proposed. Experimental results are obtained which show a resolution of δϕ ≈ 4.16 μrad in the divergence of the beam when a lens with focal length f = 25 mm and diameter D = 20 mm is used for collimation.
PB Elsevier
SN 0924-4247
YR 2015
FD 2015-09-01
LK https://hdl.handle.net/20.500.14352/24321
UL https://hdl.handle.net/20.500.14352/24321
LA eng
NO © 2015 Elsevier B.V. This work has been supported by the Ministry of Science and Innovation of Spain (project DPI2011-27851).
NO Ministerio de Ciencia e Innovación (MICINN), España
DS Docta Complutense
RD 6 abr 2025