OPTICAL ENCODER

WIPO Patent Application WO/2017/161905

A1

Provided is an optical encoder (111). The optical encoder (111) comprises a light source (1), a lens (2), an optical disk (3) with a rotating shaft (32) in the center, a scale (4) provided with a fixed grating, and a light receiving element (7) sequentially arranged inside the optical encoder (111). The body of the optical disk (3) is a rotatable disk and a center through hole (31) is arranged in the center of the disk base of the optical disk (3), and the rotating shaft (32) is through-connected to the optical disk (3) via the through hole (31). A grating transmission area is arranged on the disk base and a rectangular grating channel (33) is arranged in the grating transmission area. The width of the rectangular grating channel (33) decreases in a linear fashion with the rectangular grating channel (33) arranged so that it circles around the disk to meet itself, the width of one end being the grating width, and the width of the other end being as narrow as possible. The present invention removes higher harmonics and achieves high efficiency and accuracy without increasing manufacturing costs.

FAN XIAOBIN (CN)
GU JIANGUO (CN)
ZHONG XIAOWEI (CN)
MAO JIAN (CN)

PCT/CN2016/106670

September 28, 2017

November 21, 2016

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HAI'AN SHENLING ELECTRICAL APPLIANCE CO LTD (CN)

G01D5/347

WO2003003086A2	2003-01-09
WO2011048191A1	2011-04-28

CN105651320A	2016-06-08
CN205607415U	2016-09-28
CN203881356U	2014-10-15
CN101726324A	2010-06-09
US20080087805A1	2008-04-17

BEIJING CHINA IP LTD. (CN)

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