Position measuring method and apparatus for generating periodic

Details Position measuring method and apparatus for generating periodic Position measuring method and apparatus for generating periodic

1994-08-05

1996-12-10

Ramirez, Ellis B.

Boots, shoes, and leggings

33707, 356375, 364525, 377 24, G01B 1114

Patent

active

055837980

ABSTRACT:
A position measuring method and apparatus for obtaining signals substantially free of harmonics with the aid of a periodic graduation and a non-periodic or aperiodic scanning graduation, wherein the position of the grating lines n within the scanning graduation is determined in accordance with a statistical distribution.

REFERENCES:
patent: 3674372 (1972-07-01), Weyrauch
patent: 4225931 (1980-09-01), Schwefel
patent: 4297033 (1981-10-01), Nelle
patent: 4595991 (1986-06-01), Spies
patent: 4602436 (1986-07-01), Ernst
patent: 5332896 (1994-07-01), Holzapfel

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