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Rotary encoding device with polygonal reflector and centroid detectionA device for positioning encoding of a rotating shaft in which a polygonal mirror having a number of facets is mounted to the shaft and a light beam is directed towards the facets. The facets of the polygonal mirror reflect the light beam such that a light spot is created on a linear array detector. An analog-to-digital converter is connected to the linear array detector for reading the position of the spot on the spots on the linear array detector. A microprocessor with memory is connected to the analog-to-digital converter to hold and manipulate the data provided by the analog-to-digital converter on the position of the spot and to compute the position of the shaft based upon the data from the analog-to-digital converter.
Document ID
20080012418
Acquisition Source
Headquarters
Document Type
Other - Patent
Authors
Leviton, Douglas B.
Date Acquired
August 24, 2013
Publication Date
July 12, 1994
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
Patent Number: US-PATENT-5,329,121
Patent Application Number: US-PATENT-APPL-SN-022219
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-5,329,121
Patent Application
US-PATENT-APPL-SN-022219

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