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Oil film thickness measurement using airborne laser-induced water Raman backscatterThe use of laser-induced water Raman backscatter for remote thin oil film detection and thickness measurement is reported here for the first time. A 337.1-nm nitrogen laser was used to excite the 3400-cm-1 OH stretch band of natural ocean water beneath the oil slick from an altitude of 150 m. The signal strength of the 381-nm water Raman backscatter was always observed to depress when the oil was encountered and then return to its original undepressed value after complete aircraft traversal of the floating slick. After removal of background and oil fluorescence contributions, the ratio of the depressed-to-undepressed airborne water Raman signal intensities, together with laboratory measured oil extinction coefficients, is used to calculate the oil film thickness.
Document ID
19800068161
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hoge, F. E.
(NASA Wallops Flight Center Wallops Island, Va., United States)
Swift, R. N.
(EG & G Washington Analytical Services Center Inc., Pocomoke City, Md., United States)
Date Acquired
August 10, 2013
Publication Date
October 1, 1980
Publication Information
Publication: Applied Optics
Volume: 19
Subject Category
Instrumentation And Photography
Accession Number
80A52331
Distribution Limits
Public
Copyright
Other

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