Photodetector array and codewheel configuration for flexible...

Details Photodetector array and codewheel configuration for flexible... Photodetector array and codewheel configuration for flexible...

2008-06-17

2009-12-29

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231140, C250S231160

Reexamination Certificate

active

07638756

ABSTRACT:
An optical encoder includes a coding element having a track with multiple transparent sections, a light source positioned to output light to the track, and a photodetector array, positioned to detect light that passes through the transparent sections of the track. The photodetectors of the photodetector array have larger width dimensions than the width dimensions of the transparent sections of the track. Resolution of the optical encoder may be adjusted by changing the resolution of the coding element.

REFERENCES:
patent: 4451731 (1984-05-01), Leonard
patent: 4529964 (1985-07-01), Minami et al.
patent: 4691101 (1987-09-01), Leonard
patent: 4712000 (1987-12-01), Yoshikawa et al.
patent: 5241172 (1993-08-01), Lugaresi
patent: 6590201 (2003-07-01), Ueda
patent: 2004/0262498 (2004-12-01), Shichi et al.

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