High-Precision Digital Rotary Encoder Based on Dot-Matrix Gratings

Yi Cheng Chen, Chi Hung Lee, Ming Jie Chou, Sheng-Chih Shen

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In this paper, a high-precision digital rotary encoder based on dot-matrix gratings (DMGs) is proposed for detecting shaft rotation. The DMG-based encoder is composed of a laser diode, a beam-shaping lens, a code disc, and a detector. In principle, a shaped rectangular beam illuminates a stripe of DMGs on the disc, and from the distribution of diffractive spots on the detector, the position of rotation is then decoded. Compared with a conventional geometric rotary encoder, this diffractive rotary encoder can achieve a fourfold resolution improvement.

Original languageEnglish
Article number6801712
JournalIEEE Photonics Journal
Volume10
Issue number2
DOIs
Publication statusPublished - 2018 Apr 1

Fingerprint

coders
gratings
Detectors
matrices
Semiconductor lasers
Lenses
rectangular beams
detectors
semiconductor lasers
lenses

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

Chen, Yi Cheng ; Lee, Chi Hung ; Chou, Ming Jie ; Shen, Sheng-Chih. / High-Precision Digital Rotary Encoder Based on Dot-Matrix Gratings. In: IEEE Photonics Journal. 2018 ; Vol. 10, No. 2.
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High-Precision Digital Rotary Encoder Based on Dot-Matrix Gratings. / Chen, Yi Cheng; Lee, Chi Hung; Chou, Ming Jie; Shen, Sheng-Chih.

In: IEEE Photonics Journal, Vol. 10, No. 2, 6801712, 01.04.2018.

Research output: Contribution to journalArticle

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