Optical encoder with integrated index channel

Details Optical encoder with integrated index channel Optical encoder with integrated index channel

2005-08-31

2008-07-01

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

Reexamination Certificate

active

07394061

ABSTRACT:
An optical encoder includes an encoder pattern having (i) an A/B pattern of first areas and second areas alternating in a first direction, wherein the first areas have a different optical transmissivity or reflectivity than the second areas, and (ii) an index pattern disposed adjacent the A/B pattern in the first direction.

REFERENCES:
patent: 4691101 (1987-09-01), Leonard
patent: 5241172 (1993-08-01), Lugaresi
patent: 2005/0006571 (2005-01-01), Keong
patent: 2005/0078015 (2005-04-01), Ferran et al.

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