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