An Absolute Optical Encoder using Modulated-Photo-Diode Arrays

Atsushi Ieki; Kazuhiro Hane; Masafumi Yokoyama; Keiji Matsui; Masayuki Nashiki; Minoru Sasaki

doi:10.1299/kikaic.67.364

An Absolute Optical Encoder using Modulated-Photo-Diode Arrays

Atsushi Ieki, Kazuhiro Hane, Masafumi Yokoyama, Keiji Matsui, Masayuki Nashiki, Minoru Sasaki

Research output: Contribution to journal › Article › peer-review

Abstract

In this paper, a compact absolute optical linear encoder is proposed. The index scale of the proposed encoder has the two track (80 μm and 2 mm pitches), which consist of the pitch-modulated grating and slit-width-modulated grating, respectively. Using the modulated gratings, the harmonic noises of the encoder signals are decreased. Moreover, the respective lines of the slit-width-modulated grating are divided and re-distributed in the index scale to suppress the sensing error due to the contamination on the scale. By fabricating the index scale with silicon photodiode arrays, the proposed advantages are confirmed experimentally.

Original language	English
Pages (from-to)	364-369
Number of pages	6
Journal	Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume	67
Issue number	654
DOIs	https://doi.org/10.1299/kikaic.67.364
Publication status	Published - 2001
Externally published	Yes

Keywords

Absolute Detection
Modulated Grating
Optical Encoder
Optical Measurement
Photo-Diode Arrays
Positioning
Sensor

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1299/kikaic.67.364

Cite this

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title = "An Absolute Optical Encoder using Modulated-Photo-Diode Arrays",

abstract = "In this paper, a compact absolute optical linear encoder is proposed. The index scale of the proposed encoder has the two track (80 μm and 2 mm pitches), which consist of the pitch-modulated grating and slit-width-modulated grating, respectively. Using the modulated gratings, the harmonic noises of the encoder signals are decreased. Moreover, the respective lines of the slit-width-modulated grating are divided and re-distributed in the index scale to suppress the sensing error due to the contamination on the scale. By fabricating the index scale with silicon photodiode arrays, the proposed advantages are confirmed experimentally.",

keywords = "Absolute Detection, Modulated Grating, Optical Encoder, Optical Measurement, Photo-Diode Arrays, Positioning, Sensor",

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year = "2001",

doi = "10.1299/kikaic.67.364",

language = "English",

volume = "67",

pages = "364--369",

journal = "Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C",

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publisher = "Japan Society of Mechanical Engineers",

number = "654",

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T1 - An Absolute Optical Encoder using Modulated-Photo-Diode Arrays

AU - Ieki, Atsushi

AU - Hane, Kazuhiro

AU - Yokoyama, Masafumi

AU - Matsui, Keiji

AU - Nashiki, Masayuki

AU - Sasaki, Minoru

PY - 2001

Y1 - 2001

N2 - In this paper, a compact absolute optical linear encoder is proposed. The index scale of the proposed encoder has the two track (80 μm and 2 mm pitches), which consist of the pitch-modulated grating and slit-width-modulated grating, respectively. Using the modulated gratings, the harmonic noises of the encoder signals are decreased. Moreover, the respective lines of the slit-width-modulated grating are divided and re-distributed in the index scale to suppress the sensing error due to the contamination on the scale. By fabricating the index scale with silicon photodiode arrays, the proposed advantages are confirmed experimentally.

AB - In this paper, a compact absolute optical linear encoder is proposed. The index scale of the proposed encoder has the two track (80 μm and 2 mm pitches), which consist of the pitch-modulated grating and slit-width-modulated grating, respectively. Using the modulated gratings, the harmonic noises of the encoder signals are decreased. Moreover, the respective lines of the slit-width-modulated grating are divided and re-distributed in the index scale to suppress the sensing error due to the contamination on the scale. By fabricating the index scale with silicon photodiode arrays, the proposed advantages are confirmed experimentally.

KW - Absolute Detection

KW - Modulated Grating

KW - Optical Encoder

KW - Optical Measurement

KW - Photo-Diode Arrays

KW - Positioning

KW - Sensor

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JO - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

JF - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C

SN - 0387-5024

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ER -

An Absolute Optical Encoder using Modulated-Photo-Diode Arrays

Abstract

Keywords

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