INVESTIGADORES
TEBALDI Myrian Cristina
artículos
Título:
Positioning method based on digital moire
Autor/es:
ROBERTO TORROBA; NESTOR BOLOGNINI; MYRIAN TEBALDI; ALBERTO TAGLIAFERRI
Revista:
OPTICS COMMUNICATIONS
Editorial:
Elsevier Science
Referencias:
Lugar: Amsterdam (The Netherlands); Año: 2002 vol. 209 p. 1 - 6
ISSN:
0030-4018
Resumen:
An alternative object positioning technique based on digital moire is presented. The moire pattern is obtained bythe digital subtraction of different self-images under predetermined conditions including a grating rotation. The principle of the method relies on the fringe visibilitymatching in the moire process while moving from one self-image plane to another. The motion produces both loose of fringe contrast and rotation of the moire fringes. The theoretical model of this matching is provided. It applies the concept of measuring a global maximum contrast to each image, which allows to obtain both the best contrast and the adequate rotation. This allows a precise identification of each Talbot plane associated to an object to be positioned.
