Scale of photoelectric encoder including base member having roughened surface and manufacturing method of scale
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United States of America Patent
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Feb 9, 2016
Grant Date -
May 23, 2013
app pub date -
Nov 21, 2012
filing date -
Nov 22, 2011
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Abstract
A scale of a photoelectric encoder includes a base member and gratings on the base member. The gratings can be formed on the surface of the base member by plating and arranged at a prescribed pitch on the base member. The surface of the base member is a roughened surface which is roughened by sandblasting or with a chemical. The gratings are light absorptive gratings or light reflective metal gratings.
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