OPTICAL DISPLACEMENT ENCODER
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United States of America Patent
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Issued Date -
Oct 1, 2015
app pub date -
Mar 12, 2014
filing date -
Mar 29, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An optical encoder includes a scale having bar-like scale marks; a detection head having a light source fiber emitting coherent light at the scale and a photoreceiver fiber receiving light reflected off the scale; electronic components connected to the detection head via the light source fiber and the photoreceiver fiber; and a protector covering the scale marks at a predetermined distance from the scale marks. The protector is a member configured with light-transmissive material and includes a top surface that is inclined with respect to a principal surface of the scale.
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