Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1993-12-17
1995-09-19
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25023114, G01D 534
Patent
active
054517761
ABSTRACT:
An interferometrically readable optical encoder for sensing linear position includes an optical medium movable in a linear direction and having a data storage layer, a plurality of uniformly sized sectors being defined in the layer. A linear absolute track is defined in the layer parallel to the linear direction and a plurality of absolute marks is formed in the layer in sequence along the absolute track within each sector, each such absolute mark being detectable by interferometric reflection of coherent light as representative of a binary 1 or a binary 0 and each such plurality of absolute marks defining a binary word. A linear incremental track is defined in the layer parallel to the linear direction with a series of incremental marks formed in the layer and evenly spaced along the first incremental track, each such incremental mark being detectable by interferometric reflection of coherent light. The binary word in a sector is read to identify the position of that sector in the linear direction and indicate the approximate position of the medium. The incremental marks refine the approximate position indication to provide a more precise position of the medium.
REFERENCES:
patent: 3058001 (1962-10-01), Dertouzos
patent: 3982106 (1976-09-01), Stutz
patent: 4602242 (1986-07-01), Kimura
patent: 4633224 (1986-12-01), Gipp et al.
patent: 4914437 (1990-04-01), Kibrick et al.
patent: 5068529 (1991-11-01), Ohno et al.
patent: 5073711 (1991-12-01), Brininstool et al.
Beccue Steve
Khoshnevisan Mohsen
Kolloff Bruce G.
Schoenwald Jeffrey S.
Deinken John J.
Nelms David C.
Rockwell International Corporation
LandOfFree
High resolution optical hybrid digital-analog linear position en 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 hybrid digital-analog linear position en, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution optical hybrid digital-analog linear position en will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1829786