Determination of the integrity of part of structural materials

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

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73800, H01J 516

Patent

active

046032525

ABSTRACT:
Laminated parts of structural material receive as embedment light transmitting fibers, preferably in addition to reinforcing fibers, and light transmission through the light transmitting fibers is monitored for purposes of determining pattern irregularities and formation of cracks.

REFERENCES:
patent: 3910105 (1975-10-01), Hoffstedt
patent: 3943021 (1976-03-01), Lindsey
patent: 4221962 (1980-09-01), Black et al.
patent: 4367460 (1983-01-01), Hodara

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