Photoelectric encoder using an incoherent semiconductor...

Details Photoelectric encoder using an incoherent semiconductor... Photoelectric encoder using an incoherent semiconductor...

2007-09-04

2007-09-04

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S231140, C250S231180, C250S23700G, C250S23700G, C341S013000, C341S031000

Reexamination Certificate

active

11257895

ABSTRACT:
A photoelectric encoder is provided, which emits light from a light source to a main scale and an index scale that can relatively move with respect to each other and obtains a light-receiving signal by interaction between the main scale and the index scale. The photoelectric encoder uses as the light source an incoherent semiconductor light source (white LED) in which a full width at half maximum of an emission spectrum is wider than that of a monochromatic semiconductor light source. Thus, it is possible to reduce an effect of a gap change on an output signal of the encoder and make positional adjustment easier, thereby improving misalignment characteristics.

REFERENCES:
patent: 5026164 (1991-06-01), Ichikawa
patent: 5648658 (1997-07-01), Holzapfel et al.
patent: 6234648 (2001-05-01), Borner et al.
patent: 6597006 (2003-07-01), McCord et al.
patent: 43 37 005 (1995-05-01), None
patent: 0 291 148 (1992-06-01), None
patent: 0 718 601 (2001-11-01), None
patent: 2 120 880 (1983-12-01), None

Affiliated with

Also associated with

Rating

Photoelectric encoder using an incoherent semiconductor... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photoelectric encoder using an incoherent semiconductor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoelectric encoder using an incoherent semiconductor... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3766742