Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2005-06-17
2008-03-25
Epps, Georgia (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C356S614000
Reexamination Certificate
active
07348545
ABSTRACT:
An optical encoder system is disclosed with a single pattern medium having a first coded pattern disposed on the first side, a second coded pattern disposed on the second side, a first optical encoder disposed toward the first side, and a second optical encoder disposed toward the second side. An optical encoder device is disclosed with a first coded pattern disposed on the first side, and a second coded pattern disposed on the second side. There is disclosed a method for using an optical encoder device to obtain information related to a motor which includes the steps of illuminating a first coded pattern disposed on a first side of a pattern medium, illuminating a second coded pattern disposed on a second side of the pattern medium, detecting light reflected from the first side, detecting light reflected from the second side, and analyzing the reflected light.
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“Agilent AEAS-7000 Plug and Play Ultra-Precision Absolute Encoder 16-bit Gray Code”, Agilent Technologies, www.agilent.com/semiconductors, Feb. 23, 2004, 8 pages.
“Agilent AEDR-8300 Series Encoders Reflective Surface Mount Optical Encoder”, Agilent Technologies, www,agilent.com/semiconductors, Jun. 7, 2004, 10 pages.
Tan Hock Aun
Yeoh Theng Hooi
Avago Technologies ECBU IP Pte Ltd
Ellis Suezu
Epps Georgia
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