Performance enhancement of optical encoders for rotary laser beam scanners

Zhixin Li

doi:10.1117/12.209052

12 May 1995 Performance enhancement of optical encoders for rotary laser beam scanners

Zhixin Li

Proceedings Volume 2383, Micro-Optics/Micromechanics and Laser Scanning and Shaping; (1995) https://doi.org/10.1117/12.209052
Event: Photonics West '95, 1995, San Jose, CA, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.209052

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