Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1982-02-09
1985-05-14
McGraw, Vincent P.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
250227, G01N 2101
Patent
active
045168580
ABSTRACT:
A multiple site laser excited pollution monitoring system having a single laser located at a central location capable of providing a laser output beam, deflected in timed sequence, in a plurality of distinct different directions. Transmitting means, preferably in the form of a plurality of optical fibers, transmit the laser output beam in timed sequence to a plurality of remotely located laser excited pollution detectors (photoacoustic detector heads). Signals from the pollution detectors are transmitted to a signal processor and display unit also located at the central location. As a consequence thereof, a single laser can provide power for a plurality of laser excited detectors at a multiplicity of remote sites and thereby greatly reduce the expense involved in detecting the presence of pollutants at each of the plurality remote locations.
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Erlich Jacob N.
McGraw Vincent P.
Singer Donald J.
The United States of America as represented by the Secretary of
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