Radiant energy – With infrared or thermal pattern recording – Thermal copying of documents
Patent
1976-02-04
1978-05-30
Smith, Alfred E.
Radiant energy
With infrared or thermal pattern recording
Thermal copying of documents
250402, G03B 3500, G03C 900
Patent
active
040925374
ABSTRACT:
The passage of foreign objects such as bullets or stones through a gas turbine engine compressor is observed by directing beams of x-radiation through the engine, receiving the beams on fluorescent screens, to form fluorescent images, intensifying the fluorescent images by respective image intensifiers and recording the intensified images with respective high speed cine cameras.
REFERENCES:
patent: 2853619 (1958-09-01), DeWitt
patent: 3440422 (1969-04-01), Ball et al.
patent: 3769633 (1973-10-01), Teeter
patent: 3890503 (1975-06-01), Brewster
Anderson B.
Rolls-Royce (1971) Limited
Smith Alfred E.
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