Position detection signal processing apparatus

Details Position detection signal processing apparatus Position detection signal processing apparatus

1983-02-09

1986-07-08

Rosenberger, R. A.

Optics: measuring and testing

By alignment in lateral direction

With registration indicia

356400, G01B 1100

Patent

active

045990000

ABSTRACT:
Disclosed is a position detection signal processing apparatus to be used with a first body having a first pattern for alignment and a second body having a second pattern. The apparatus includes a pattern detecting device for detecting the first and second patterns and producing a detection signal stream, an expectation pulse forming circuit for forming an expectation pulse signal for specifying the portion of the detection signal stream in which the probability with which signals corresponding to the first and second patterns exist is high, and a true signal forming circuit for forming true signal streams corresponding to the first and second patterns from the detection signal stream and the expectation pulse signal.

REFERENCES:
patent: 3955072 (1976-05-01), Johannsmeier et al.
patent: 4291334 (1981-09-01), Mese et al.
patent: 4315201 (1982-02-01), Suzuki et al.

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