High-resolution encoder using double gratings

Koichi Kudo; Hideo Maeda; Nobuyuki Baba; Hiroyoshi Funato

doi:10.1117/12.215308

27 July 1995 High-resolution encoder using double gratings

Koichi Kudo, Hideo Maeda, Nobuyuki Baba, Hiroyoshi Funato

Proceedings Volume 2577, International Conference on Applications of Optical Holography; (1995) https://doi.org/10.1117/12.215308
Event: International Conferences on Optical Fabrication and Testing and Applications of Optical Holography, 1995, Tokyo, Japan

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.

Citation Download Citation

Koichi Kudo, Hideo Maeda, Nobuyuki Baba, and Hiroyoshi Funato "High-resolution encoder using double gratings", Proc. SPIE 2577, International Conference on Applications of Optical Holography, (27 July 1995); https://doi.org/10.1117/12.215308

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