Method and apparatus for optically measuring the thickness of a coating
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United States of America Patent
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May 4, 1993
Grant Date -
N/A
app pub date -
Jan 16, 1991
filing date -
Feb 23, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and an apparatus for measuring the thickness of a coating provided around a cylindrical object such as an optical fiber optically. The cylindrical object is irradiated by a measuring light and the light derived from the object is received by a photo-detector so that the intensity of the derived light is measured to thereby detect the thickness of the coating.
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