Method and apparatus for measuring the distance of a discontinui

Details Method and apparatus for measuring the distance of a discontinui Method and apparatus for measuring the distance of a discontinui

1975-10-29

1977-05-03

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

356239, G01N 2116, G01N 2132

Patent

active

040211215

ABSTRACT:
A method and apparatus for measuring the distance of a discontinuity in a glass fiber from one end of the fiber characterized by coupling a pulse into the one end, sensing a pulse of light reflected by a discontinuity as it leaves the one end and measuring the time lapse between the pulse to determine the distance of the discontinuity from the one end.

REFERENCES:
patent: 3402630 (1968-09-01), Blau et al.
patent: 3728026 (1973-04-01), Idestrom et al.
patent: 3743419 (1973-07-01), Shagerlund
patent: 3884585 (1975-05-01), Lebduska
"Pinpointing Cable Faults," Allan; Post Office Telecommun J. (GB), vol. 22, No. 4, 1970-1971, pp. 5-7.

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