Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2008-07-02
2010-10-26
Le, Que T (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S214100
Reexamination Certificate
active
07820957
ABSTRACT:
This optical encoder includes a light emitting section and a plurality of light receiving elements placed so as to be aligned in one direction in an area where a light beam from the light emitting section may reach. The moving object includes a light-ON section and a light-OFF section. The light receiving element detects movement of the moving object when the light-ON section and the light-OFF section of the moving object pass through a predetermined position corresponding to the light receiving element A light receiving signal processing section receives inputs of a plurality of light receiving signals with different phases from a plurality of the light receiving elements, performs signal processing including at least one signal processing among a logical operation processing, an addition processing, and a subtraction processing on a plurality of the light receiving signals, and outputs an output signal containing a plurality of signal components which are different in phase and different in signal level with respect to a predetermined threshold level.
REFERENCES:
patent: 4654525 (1987-03-01), Ebina et al.
patent: 4912322 (1990-03-01), Ichikawa
patent: 5438193 (1995-08-01), Takagi et al.
patent: 6154278 (2000-11-01), Ito et al.
patent: 7223963 (2007-05-01), Okada et al.
patent: 7312437 (2007-12-01), Hane
patent: 7329858 (2008-02-01), Okada
patent: 2006/0226349 (2006-10-01), Okada et al.
patent: 2007/0008192 (2007-01-01), Fujita
patent: 59-40258 (1984-03-01), None
patent: 60-88316 (1985-05-01), None
patent: 01-291101 (1989-11-01), None
patent: 07-181009 (1995-07-01), None
patent: 11-64042 (1999-03-01), None
patent: 11-325830 (1999-11-01), None
patent: 2000-121390 (2000-04-01), None
patent: 2005-61896 (2005-03-01), None
patent: 2005-300405 (2005-10-01), None
patent: 2007-64981 (2007-03-01), None
Kimura Tadamasa
Okada Norikazu
Bennett Jennifer
Birch & Stewart Kolasch & Birch, LLP
Le Que T
Sharp Kabushiki Kaisha
LandOfFree
Optical encoder for detecting movement of a moving object... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical encoder for detecting movement of a moving object..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical encoder for detecting movement of a moving object... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4202829