Compact displacement detecting system with optical integrated ci

Details Compact displacement detecting system with optical integrated ci Compact displacement detecting system with optical integrated ci

1994-10-06

1996-05-28

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

2502014, 356376, G01N 2186

Patent

active

055213944

ABSTRACT:
A displacement detecting system comprises an optical detector which includes a one-chip optical IC having a laser light source, light receiving elements for generating, in response to laser light reflected by a surface to be measured, a focus error signal indicative of a deviation of a distance between the surface and an objective lens from a focal length thereof, and a prism.

REFERENCES:
patent: 5144603 (1992-09-01), Mozume et al.
patent: 5247165 (1993-09-01), Hiruta et al.
patent: 5283771 (1994-02-01), Kadowaki et al.

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