G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/24 (2006.01) G01D 5/26 (2006.01) G01D 5/38 (2006.01)
Patent
CA 2319898
A simple optical position encoder of detecting the position of a light spot generated by any light source of either light generating or light reflecting type, directly in a binary or other encoded format at very high speed, comprises a diffractive optical element including an array of diffractive cells each being formed by a unique arrangement of diffractive sub-cells and being disposed at a predetermined position with respect to a predetermined reference point on the diffractive optical element. Each cell is capable of generating a unique optical diffraction pattern when illuminated. When an image of the light spot is formed on the diffractive element, at least one cell is positioned to receive the light spot input image, generating its unique optical diffraction pattern accordingly at an output image plane, where one or more optical detectors are disposed. The detectors are responsive to the unique optical diffraction pattern to generate one or more encoded signals indicative of the position of the light spot image with respect to said reference point. Described applications of the basic embodiment of the position encoder includes absolute three-dimensional position measurement of a light spot formed on a object, position encoding of a light peak generated by an optical processor or correlator and absolute/relative position detection of a light spot generated by or reflected onto an object in a two-dimensional coordinates system.
Bergeron Alain
Doucet Michel
Prevost Donald
Institut National D'optique
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
LandOfFree
Position encoding optical device and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Position encoding optical device and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Position encoding optical device and method will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1605829