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1. (WO2018126039) OPTICAL ENCODER SYSTEM AND METHOD

Pub. No.:    WO/2018/126039    International Application No.:    PCT/US2017/068762
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Dec 29 00:59:59 CET 2017
IPC: G01D 5/347
G01M 15/06
Applicants: NAOR, Michael
M&B IP ANALYSTS, LLC
Inventors: NAOR, Michael
Title: OPTICAL ENCODER SYSTEM AND METHOD
Abstract:
An improved optical decoder uses an optical pick-up unit that provides for degrees of freedom in the tracking and focus axes that are unavailable in conventional optical encoders thereby improving the encoders' performance. In an embodiment the encoder employs an optical disc marked with pits and lands which may be arranged in a spiral pattern. The optical disc is mounted on the shaft whose motion is to be monitored by the optical encoder. The encoder may be arranged to read the markings on the optical disc using the three-beam pickup method.