Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2003-06-04
2004-07-27
Dang, Hung X. (Department: 2873)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S216000, C359S641000
Reexamination Certificate
active
06768101
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to the field of optical encoders, and more particularly to an angular collimated reflective optical encoder.
BACKGROUND OF THE INVENTION
There are a number of types of optical encoders available on the market today. Optical encoders are particularly useful for scanning information or movements and recording or transmitting such information. For instance, optical encoders have been used extensively on automation lines or in conjunction with robots to determine movement or actions in the assembly process. Each of the optical encoders on the market generally includes a source, a reflective code wheel and a receiver. A problem with these designs concerns the fact that the light beam in certain instances is out of phase or dispersed as it passes from source to reflective code wheel to receiver. This leads to lower overall signal and signal contrast that is detectable by receiver and may provide poor results or operation depending upon how the optical encoder has been used. Certain applications require improved resolution in order to take advantage of the optical encoder devices. Furthermore, it is desirable to have a design in which all components are present on the same platform so that a common surface mount may be employed. These and other problems of the art have been obviated by the present invention.
SUMMARY OF THE INVENTION
The invention provides an angular collimated reflective optical encoder. The angular collimated reflective optical encoder comprises a source for providing a light beam, a collimator adjacent to the source for collimating the light beam at a defined angle, a reflective surface adjacent to the collimator for reflecting the light beam collimated by the collimator, and a receiver for receiving the reflected and collimated light beam.
REFERENCES:
patent: 6525303 (2003-02-01), Gladnick
Chin Yee Long
Chong Chee Keong
Goh Kee Siang
Lee Boon Kheng
Singh Gurbir
Agilent Technologie,s Inc.
Dang Hung X.
Joyce Timothy H.
LandOfFree
High resolution optical encoder with an angular collimated... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High resolution optical encoder with an angular collimated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution optical encoder with an angular collimated... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3254944