Absolute linear encoder

Details Absolute linear encoder Absolute linear encoder

2006-09-27

2008-10-07

Epps, Georgia Y. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S23700G, C341S011000, C356S617000, C033S0010PT

Reexamination Certificate

active

07432497

ABSTRACT:
An absolute linear encoder includes a plurality of absolute scales aligned in the detection direction with absolute calibrations, a plurality of detectors for detecting the calibrations on the absolute scales, absolute position data generating portions of each scale for generating absolute position data of each detector, and a calculator for outputting an absolute position over the whole length of connected whole absolute scales adding the absolute position data of each detector and the distance between the detectors. The detectors are fixed at such intervals as to simultaneously detect the calibrations of the two absolute scales adjoining in a scale connecting section. Thus, the long absolute linear encoder which is easy to use is realized at low costs.

REFERENCES:
patent: 4983900 (1991-01-01), Nashiki et al.
patent: 5442166 (1995-08-01), Hollmann
patent: 5563408 (1996-10-01), Matsumoto et al.
patent: 6421132 (2002-07-01), Brajovic
patent: 6642509 (2003-11-01), Miyata

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