Optical encoder based on a nondiffractive beam

Journal Article · Thu May 01 00:00:00 EDT 2008 · Applied Optics

DOI:https://doi.org/10.1364/AO.47.002201· OSTI ID:21120725

Lutenberg, Ariel; Perez-Quintian, Fernando; Rebollo, Maria A

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.

• OSTI ID: 21120725
• Journal Information: Applied Optics, Vol. 47, Issue 13; Other Information: DOI: 10.1364/AO.47.002201; (c) 2008 Optical Society of America; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6935
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
APPROXIMATIONS
PERTURBATION THEORY
ROTATION
SIGNALS
SPECTRA
SYMMETRY
TOLERANCE