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Proceedings Paper

High-resolution encoder using double gratings
Author(s): Koichi Kudo; Hideo Maeda; Nobuyuki Baba; Hiroyoshi Funato
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Paper Abstract

We propose a new signal detection method for optical encoders. Two diffraction gratings whose periods are slightly different from eachother are irradiated by a collimated beam to make an interference fringe. This encoder system has a simple structure while the performance is not influenced by the wavelength change, theoretically. A quasi sine curve of period 0.5 micrometers was detected by a fundamental experiment.

Paper Details

Date Published: 27 July 1995
PDF: 8 pages
Proc. SPIE 2577, International Conference on Applications of Optical Holography, (27 July 1995); doi: 10.1117/12.215308
Show Author Affiliations
Koichi Kudo, RICOH Co., Ltd. (Japan)
Hideo Maeda, RICOH Co., Ltd. (Japan)
Nobuyuki Baba, RICOH Co., Ltd. (Japan)
Hiroyoshi Funato, RICOH Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 2577:
International Conference on Applications of Optical Holography

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