Resumes
Resumes
Ernest Riedel Phones & Addresses
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6311 N Pinegrove Dr, Coeur d Alene, ID 83815 (208) 765-4983
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Hayden, ID
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Newport Coast, CA
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Murrysville, PA
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San Francisco, CA
Publications
Us Patents
Method And Apparatus For Optically Detecting Circuit Malfunctions
View pageUS Patent:
48120375, Mar 14, 1989
Filed:
Mar 11, 1988
Appl. No.:
7/166946
Inventors:
Ernest P. Riedel - Murrysville PA
Robert A. Boenning - Timonium MD
Robert A. Boenning - Timonium MD
Assignee:
Westinghouse Electric Corp. - Pittsburgh PA
International Classification:
G01N 2123
US Classification:
356 35
Abstract:
An apparatus for optically detecting electronic circuit malfunctions includes a light transmitting plate member which is adapted to be positioned adjacent to a plurality of individual electronic circuit elements positioned on a printed circuit board. First and second polarizing filters are positioned adjacent to opposing edges of the light transmitting plate. As the individual electronic circuit elements positioned on the circuit board are operated, the nonuniform heating of the light transmitting plate by the circuit elements produces mechanical stresses within the plate. As monochromatic or white light is passed through the pair of polarizing filters and the light transmitting plate, a light/dark striated pattern of light is produced on the surface of the second polarizing filter. By recording the pattern of a properly operating printed circuit board, a reference pattern may be obtained. Subsequent patterns of light are compared to the reference pattern in order to detect differences between patterns.
Wikipedia
Ernest Riedel
View pageErnest W. Riedel (July 13, 1901 March 26, 1983) was an American sprint canoer who competed from the late 1930s to the late 1940s. Competing in two Summer Olympics, he won a bronze ...