27 July 1995 High-resolution encoder using double gratings
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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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Koichi Kudo, Hideo Maeda, Nobuyuki Baba, Hiroyoshi Funato, "High-resolution encoder using double gratings", Proc. SPIE 2577, International Conference on Applications of Optical Holography, (27 July 1995); doi: 10.1117/12.215308; https://doi.org/10.1117/12.215308
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