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A remote sensing laser fluorometerA sensor is reported which is able to identify certain specific substances in water by means of their fluorescence spectra. In particular, the sensor detects oil, ligninsulfonates and chlorophyll. The device is able to measure the fluorescence spectra of water at ranges up to 75 m and to detect oil spills on water at altitudes up to 300 m. Blue light from a laser is used to excite the fluorescence of the target. Any light from the ambient background illumination, from the reflected laser light or from the induced fluorescence is gathered by a small telescope focused on the target. Optical filters are used to block the reflected laser light and to select the wavelengths of interest in the fluorescence spectrum of the target. The remaining light is detected with a photomultiplier tube. The amplitude of the laser induced fluorescence in the wavelength interval selected by the optical filters is displayed on a meter or strip chart recorder.
Document ID
19750022465
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Oneill, R. A.
(Department of Environment Ottawa Ontario, Canada)
Davis, A. R.
(Department of Environment Ottawa Ontario, Canada)
Gross, H. G.
(Department of Environment Ottawa Ontario, Canada)
Kruus, J.
(Department of Environment Ottawa Ontario, Canada)
Date Acquired
August 8, 2013
Publication Date
January 1, 1975
Publication Information
Publication: NASA. Wallops Station The Use of Lasers for Hydrographic studies
Subject Category
Lasers And Masers
Accession Number
75N30538
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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