Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1981-01-05
1983-02-15
Corbin, John K.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01B 1102
Patent
active
043738150
ABSTRACT:
A method and apparatus for detecting and measuring leaks in liquid storage vessels, such as underground gasoline storage tanks. A laser source beam is divided into second and third beams which are reflected normally off of a reference surface and the liquid surface, respectively, in the storage vessel. The reflected beams are recombined and the recombined beam is analyzed over time to detect fringes and thereby measure changes in the liquid surface level in the storage vessel.
REFERENCES:
patent: 3511572 (1970-05-01), Peabe et al.
Harrison et al., "A New Interferometric Manometer", Metrologia, vol. 12, No. 3, pp. 115-120, 1976.
Corbin John K.
Hummel Jack L.
Koren Matthew W.
Marathon Oil Company
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