title: Self-imaging technique for beam collimation.
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.
authors.forename: Luis Miguel
authors.initials: LM
authors.lastname: Sanchez-Brea
authors.forename: Francisco Jose
authors.initials: FJ
authors.lastname: Torcal-Milla
authors.forename: Jose Maria
authors.initials: JM
authors.lastname: Herrera-Fernandez
authors.forename: Tomas
authors.initials: T
authors.lastname: Morlanes
authors.forename: Eusebio
authors.initials: E
authors.lastname: Bernabeu