1
Nicholas Liptay Wagner, Roland Renaud, Timothy R Pryor, Donald A Clarke: Surface reflectivity detector with oil mist reflectivity enhancement. Diffracto, Larson and Taylor, August 11, 1987: US04686374 (52 worldwide citation)

A method an apparatus are provided for inspecting the surface of objects such as panels for automobile vehicles wherein the surface of the object is sprayed with an oil mist or the like to increase the reflectivity thereof. The surface is then illuminated with light so that the light image reflected ...


2
Nicholas Liptay Wagner, Roland Renaud, Timothy R Pryor, Donald A Clarke: New photodetector array based optical measurement systems. Diffracto, Larson and Taylor, July 19, 1983: US04394683 (37 worldwide citation)

A method and apparatus are provided for analyzing the light pattern produced on a photodetector array. The signal produced by the array is filtered with a low pass filter and the output of the filter is differentiated to obtain either the first or second derivative of the filtered signal for one or ...


3
Nicholas Liptay Wagner, Roland Renaud, Timothy R Pryor, Donald A Clarke: Photodetector array based optical measurement systems. Diffracto, Larson and Taylor, April 29, 1986: US04585947 (17 worldwide citation)

This invention relates to new and useful electro-optical methods and apparatus using photodetector arrays for measurement of parts and other objects in industrial environments. Several particularly useful optical embodiments are illustrated together with desirable electronic circuitry for improving ...