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Proceedings Paper

Study of an incremental optical encoder using speckle
Author(s): Fernando Perez Quintián; Ariel Lutenberg; María Aurora Rebollo
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Paper Abstract

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.

Paper Details

Date Published: 15 September 2006
PDF: 6 pages
Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 634121 (15 September 2006); doi: 10.1117/12.695480
Show Author Affiliations
Fernando Perez Quintián, Univ. de Buenos Aires (Argentina)
Ariel Lutenberg, Univ. de Buenos Aires (Argentina)
María Aurora Rebollo, Univ. de Buenos Aires (Argentina)

Published in SPIE Proceedings Vol. 6341:
Speckle06: Speckles, From Grains to Flowers
Pierre Slangen; Christine Cerruti, Editor(s)

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