Study of an incremental optical encoder using speckle

Fernando Perez Quintián; Ariel Lutenberg; María Aurora Rebollo

doi:10.1117/12.695480

15 September 2006 Study of an incremental optical encoder using speckle

Fernando Perez Quintián, Ariel Lutenberg, María Aurora Rebollo

Proceedings Volume 6341, Speckle06: Speckles, From Grains to Flowers; 634121 (2006) https://doi.org/10.1117/12.695480
Event: Speckle06: Speckles, From Grains to Flowers, 2006, Nimes, France

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.

Citation Download Citation

Fernando Perez Quintián, Ariel Lutenberg, and María Aurora Rebollo "Study of an incremental optical encoder using speckle", Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 634121 (15 September 2006); https://doi.org/10.1117/12.695480

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