INVESTIGADORES
LUTENBERG Ariel
artículos
Título:
Study of an incremental optical encoder using speckle
Autor/es:
F. PEREZ QUINTIÁN; A. LUTENBERG; M.A. REBOLLO
Revista:
SPIE
Referencias:
Año: 2006 p. 21 - 28
ISSN:
0277-786X
Resumen:
We present a study of the performance of an incremental optical encoder that works using speckle pattern illumination and a phase grating. The operational principle of the encoder lies in measuring the variations of a speckle pattern passing through the phase grating that can be displaced. This study is described theoretically by a model based on the scalar diffraction theory in the Fresnel zone. The intensity correlation of the modified speckle as a function of the grating displacement is obtained and compared with experimental results. Likewise, the mounting tolerances of the proposed system are analyzed.
