Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2008-07-15
2008-07-15
Epps, Georgia Y. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S231190, C345S166000
Reexamination Certificate
active
11204913
ABSTRACT:
A method and system for an optical navigation device configured to generate navigation information through a transparent layer. Specifically, the optical navigation device includes a light source that is configured to illuminate a reflective surface through a layer that is optically transparent to the light source. A sensor is configured to generate navigation information in response to light reflecting off the reflective surface. The sensor is configured with a depth of field to support a distance between the sensor and the reflective surface. A contact sensor is also included to indicate when the optical navigation device is no longer in contact with the transparent layer. The contact sensor allows for skating functionality for the optical navigation device.
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Avago Technologies ECBU IP Pte Ltd
Epps Georgia Y.
Sohn Seung C.
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