12 May 1995 Performance enhancement of optical encoders for rotary laser beam scanners
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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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhixin Li, Zhixin Li, } "Performance enhancement of optical encoders for rotary laser beam scanners", Proc. SPIE 2383, Micro-Optics/Micromechanics and Laser Scanning and Shaping, (12 May 1995); doi: 10.1117/12.209052; https://doi.org/10.1117/12.209052

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