Encoder with a combined position and index track

Details Encoder with a combined position and index track Encoder with a combined position and index track

2008-06-24

2009-11-17

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S23700G

Reexamination Certificate

active

07619209

ABSTRACT:
An optical encoder. The encoder includes a coding element, an emitter, and a detector. The coding element has a track with a track pattern. The track pattern includes a plurality of optically distinguishable sections, which include a plurality of position sections and an index section. The emitter generates a light signal incident on the track of the coding element. The detector includes a combined position and index photodetector array. The combined position and index photodetector array includes a plurality of position photodetectors and an index photodetector. Embodiments of this type of optical encoder implement position and index sections in a single track on the coding element.

REFERENCES:
patent: 4451731 (1984-05-01), Leonard
patent: 4691101 (1987-09-01), Leonard
patent: 4866269 (1989-09-01), Wlodarczyk et al.
patent: 5241172 (1993-08-01), Lugaresi
patent: 6639207 (2003-10-01), Yamamoto et al.
patent: 2002/0180691 (2002-12-01), Wong et al.
patent: 2005/0088667 (2005-04-01), Yeo
patent: 2005/0133705 (2005-06-01), Hare et al.
patent: 2005/0236560 (2005-10-01), Ch'ng et al.
patent: 2006/0192764 (2006-08-01), Siddiqui
patent: 2006/170788 (2006-06-01), None

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