Edge timing in an optical measuring apparatus

Optics: measuring and testing – By configuration comparison – With photosensitive film or plate

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356387, 250563, G01B 1110

Patent

active

043324754

ABSTRACT:
An electro-optical sensor is described which provides a high resolution measurement of the location of the edge of an object. By passing the electrical pulse produced by an edge sensor into a multiply tapped delay line the location of the edge of an object can be measured with high resolution.

REFERENCES:
patent: 3731196 (1973-05-01), Young
patent: 3905705 (1975-09-01), Petrohilos
patent: 3907439 (1975-09-01), Zanoni
patent: 4097158 (1978-06-01), Dehait
patent: 4294545 (1981-10-01), Stutz
McNeish et al. "Counter Brings Best Resolution to One-Shots, does Math and Reads Volts" Electronic Design 9, 26 Apr. 1980, pp. 137-140.
Chu et al. "Universal Counter Resolves Picoseconds in Time Interval Measurements" Hewlett-Packard Journal, Aug. 1978, pp. 2-11.

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