Optical position sensing device and method for sub-micron measur

Details Optical position sensing device and method for sub-micron measur Optical position sensing device and method for sub-micron measur

1996-09-27

1998-12-01

Voeltz, Emanuel T.

Boots, shoes, and leggings

36457103, 36457104, 32420713, 324254, 360 7712, 360126, G11B 555

Patent

active

058448144

ABSTRACT:
A high resolution, independent position sensor is provided, having application in a magnetic tape drive and other environments in which a linear or angular position is to be monitored. Analog outputs from an inexpensive, low resolution optical encoder are processed to correct gain and offset distortions and are used as the basis for an interpolation process. If a code strip having a 127-micron grating is used, a resolution of about 0.125 microns can be achieved.

REFERENCES:
patent: 4691101 (1987-09-01), Leonard
patent: 4809110 (1989-02-01), Hertrich
patent: 4904861 (1990-02-01), Epstein et al.
patent: 5339598 (1994-08-01), Denison et al.
patent: 5377052 (1994-12-01), Guzman et al.
patent: 5432652 (1995-07-01), Comeaux et al.
patent: 5525902 (1996-06-01), Nakajima

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