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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 31 — Nov. 1, 2004
  • pp: 5754–5762

Design and construction of linear laser encoders that possess high tolerance of mechanical runout

Chih-Kung Lee, Chyan-Chyi Wu, Shih-Jui Chen, Liang-Bin Yu, You-Chia Chang, Yeong-Feng Wang, Jau-Yu Chen, and Jeremy Wen-Jong Wu  »View Author Affiliations


Applied Optics, Vol. 43, Issue 31, pp. 5754-5762 (2004)
http://dx.doi.org/10.1364/AO.43.005754


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Abstract

A linearly diffracted laser encoder that has high tolerance of head-to-scale misalignment and a high signal-to-noise ratio is described. The preservation of parallelism between the incident and the diffracted beams, which can be attributed to a built-in folded 1× telescope, allows for the high alignment tolerance. It can be shown that, by coupling this newly developed circular polarization interferometer configuration with grating scale geometry optimization, one can eliminate the problems associated with signal distortion that arise from various efficiencies of the p- and the s-polarized light beams and obtain a high signal-to-noise ratio. Both theoretical and experimental results are presented to confirm the improved results and performance.

© 2004 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(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
(220.4830) Optical design and fabrication : Systems design

History
Original Manuscript: January 12, 2004
Revised Manuscript: June 4, 2004
Manuscript Accepted: July 20, 2004
Published: November 1, 2004

Citation
Chih-Kung Lee, Chyan-Chyi Wu, Shih-Jui Chen, Liang-Bin Yu, You-Chia Chang, Yeong-Feng Wang, Jau-Yu Chen, and Jeremy Wen-Jong Wu, "Design and construction of linear laser encoders that possess high tolerance of mechanical runout," Appl. Opt. 43, 5754-5762 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-31-5754


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