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Proceedings Paper

Performance enhancement of optical encoders for rotary laser beam scanners
Author(s): Zhixin Li
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Paper Abstract

The performance of the rotary encoder is crucial to the accuracy of pixel addressing of a laser beam scanning system. In this paper, a theoretical analysis is conducted on a variety of error factors affecting encoder performance. These factors include code disk eccentricity, line-to- line error, shaft repeatable wobble and NRW, speed control and zero-delay jitter. Measurement techniques of these error factors at full operating speeds are discussed. Practical correction methods of these errors are also suggested. It has been demonstrated in a production environment that with the help of proper error measurement and correction techniques, enhanced performance of the rotary encoder with arcseconds of repeatable error and sub-arcsecond of non-repeatable error can be achieved, which exceeds the most stringent specifications so far on encoder performance in the field of laser beam information scanning.

Paper Details

Date Published: 12 May 1995
PDF: 15 pages
Proc. SPIE 2383, Micro-Optics/Micromechanics and Laser Scanning and Shaping, (12 May 1995); doi: 10.1117/12.209052
Show Author Affiliations
Zhixin Li, Ferrofluidics Corp. (United States)


Published in SPIE Proceedings Vol. 2383:
Micro-Optics/Micromechanics and Laser Scanning and Shaping
M. Edward Motamedi; Leo Beiser, Editor(s)

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