Reduction of higher order signal distortion in optical encoder using modulated pitch grating

Atsushi Ieki, Keiji Matsui, Masayuki Nashiki, Kazuhiro Hane

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Signal intensity of the light diffracted from the superimposed dual transmission gratings is affected by the higher harmonic distortion (deviation from sinusoidal variation). In this study, the method using the modulated pitch grating that was proposed preciously was extended to more general conditions. The design method for modulating the grating was analyzed in detail and the distortions in the order up to the 13th were removed in the experiment using the proposed grating.

Original languageEnglish
Pages (from-to)1087-1092
Number of pages6
JournalSeimitsu Kogaku Kaishi/Journal of the Japan Society for Precision Engineering
Volume66
Issue number7
DOIs
Publication statusPublished - 2000 Jul

Keywords

  • Diffraction grating
  • Modulated pitch grating
  • Optical encoder

ASJC Scopus subject areas

  • Mechanical Engineering

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