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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 13 — May. 1, 2008
  • pp: 2201–2206

Optical encoder based on a nondiffractive beam

Ariel Lutenberg, Fernando Perez-Quintián, and María A. Rebollo  »View Author Affiliations

Applied Optics, Vol. 47, Issue 13, pp. 2201-2206 (2008)

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Optical encoders are used in industrial and laboratory motion equipment to measure rotations and linear displacements. We introduce a design of an optical encoder based on a nondiffractive beam. We expect that the invariant profile and radial symmetry of the nondiffractive beam provide the design with remarkable tolerance to mechanical perturbations. We experimentally demonstrate that the proposed design generates a suitable output sinusoidal signal with low harmonic distortion. Moreover, we present a numerical model of the system based on the angular spectrum approximation whose predictions are in excellent agreement with the experimental results.

© 2008 Optical Society of America

OCIS Codes
(040.5160) Detectors : Photodetectors
(050.1950) Diffraction and gratings : Diffraction gratings
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4570) Instrumentation, measurement, and metrology : Optical design of instruments

Original Manuscript: November 29, 2007
Revised Manuscript: February 22, 2008
Manuscript Accepted: February 22, 2008
Published: April 22, 2008

Ariel Lutenberg, Fernando Perez-Quintián, and María A. Rebollo, "Optical encoder based on a nondiffractive beam," Appl. Opt. 47, 2201-2206 (2008)

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