Optical position encoder based on four-section diffraction grating

A. Y. Zherdev; S. B. Odinokov; D. S. Lushnikov; V. V. Markin; O. A. Gurylev; M. V. Shishova

doi:10.1117/12.2264801

15 May 2017 Optical position encoder based on four-section diffraction grating

A. Y. Zherdev, S. B. Odinokov, D. S. Lushnikov, V. V. Markin, O. A. Gurylev, M. V. Shishova

Proceedings Volume 10233, Holography: Advances and Modern Trends V; 102331I (2017) https://doi.org/10.1117/12.2264801
Event: SPIE Optics + Optoelectronics, 2017, Prague, Czech Republic

Abstract

Optical position encoder consists of movable coding grating and fixed analyzing grating. Light passing and diffracting through these two gratings creates interference signal on optical detector. Decoding of interference signal phase allows to determinate current position. Known optical position encoders use several accurate adjusted optical channels and detectors to gather several signals with different phase for higher encoder accuracy. We propose to use one optical channel with several-section analyzing diffraction grating for this purpose to simplify optical scheme and adjusting requirements. Optical scheme of position encoder based on four-section analyzing diffraction grating is developed and described in this paper.

Citation Download Citation

A. Y. Zherdev, S. B. Odinokov, D. S. Lushnikov, V. V. Markin, O. A. Gurylev, and M. V. Shishova "Optical position encoder based on four-section diffraction grating", Proc. SPIE 10233, Holography: Advances and Modern Trends V, 102331I (15 May 2017); https://doi.org/10.1117/12.2264801

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