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Optical Engineering

High-performance absolute rotary encoder using multitrack and M-code
Author(s): Yuji Matsuzoe; Nobuhiko Tsuji; Tomoharu Nakayama; Koetsu Fujita; Toru Yoshizawa
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Paper Abstract

We describe the development of a high-resolution absolute optical encoder that achieves a resolution of 4,194,304 division/rev (22 bits) at a diameter of 34 mm, based on a new angle detection principle in which the two sets of interpolation data from two differing cycles by multitrack and M-code (maximum length sequence) data are combined. This absolute encoder also achieves an accuracy of 20 arcsec (16 bits) to minimize the sinusoid wave distortion of the signal from the photodetector.

Paper Details

Date Published: 1 January 2003
PDF: 8 pages
Opt. Eng. 42(1) doi: 10.1117/1.1523943
Published in: Optical Engineering Volume 42, Issue 1
Show Author Affiliations
Yuji Matsuzoe, Fuji Electric Corp. Research and Development, Ltd. (Japan)
Nobuhiko Tsuji, Fuji Electric Corp. Research and Development, Ltd. (Japan)
Tomoharu Nakayama, Fuji Electric Corp., Ltd. (Japan)
Koetsu Fujita, Fuji Electric Corp., Ltd. (Japan)
Toru Yoshizawa, Tokyo Univ. of Agriculture and Technology (Japan)

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