27 July 1995 High-resolution encoder using double gratings
Author Affiliations +
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
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, Koichi Kudo, Hideo Maeda, Hideo Maeda, Nobuyuki Baba, Nobuyuki Baba, Hiroyoshi Funato, 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

Back to Top