Apparatus and method for measuring linear and angular displaceme

Details Apparatus and method for measuring linear and angular displaceme Apparatus and method for measuring linear and angular displaceme

1993-09-03

1995-10-10

Wirthlin, Alvin

Geometrical instruments

Distance measuring

Scale reading position sensor

33706, 250237G, 356374, G01B 1100

Patent

active

054560217

ABSTRACT:
An apparatus and method for measuring displacement by determining the relative speed between a scale and a scanning plate from reading out a first track twice at different times. From this, correction values for the other tracks are calculated, which represent values from those tracks that would have been read out if all those tracks had been read out at the same time the first track was read out instead of sequentially.

REFERENCES:
patent: 4225931 (1980-09-01), Schwefel
patent: 4580046 (1986-04-01), Sasaki et al.
patent: 4602436 (1986-07-01), Ernst
patent: 4778273 (1988-10-01), Michel

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