Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2008-04-08
2011-10-11
Nguyen, Sang (Department: 2886)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C356S615000
Reexamination Certificate
active
08035079
ABSTRACT:
An optical encoder includes a scale, and a detecting head which is disposed facing the scale. The scale is provided with a grating which has a predetermined optical pattern with respect to a direction of relative movement, and the detecting head is provided with a light emitting section which irradiates predetermined light to the scale, and a light detecting section which detects a movement of a pattern of light distribution formed on a light receiving surface of a photodetector, by light reflected by the grating upon being irradiated to the scale from the light emitting section. A light transmitting member is disposed on a surface of the light emitting section and the photodetector of the detecting head, toward the scale, and a light propagation controlling pattern for controlling propagation of light is disposed on a surface of the light transmitting member, facing the scale.
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Nguyen Sang
Olympus Corporation
Scully , Scott, Murphy & Presser, P.C.
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