Optics: measuring and testing – For light transmission or absorption – Of fluent material
Reexamination Certificate
2007-07-17
2007-07-17
Lauchman, Layla G. (Department: 2877)
Optics: measuring and testing
For light transmission or absorption
Of fluent material
C250S343000
Reexamination Certificate
active
10517177
ABSTRACT:
Methods and apparatus for detecting photoacoustic signals in fluid media are described. The present invention differs from conventional photoacoustic spectroscopy in that rather than accumulating the absorbed energy in the fluid of a sample cell, the absorbed energy is accumulated in an acoustic detector or sensitive element. In a preferred embodiment, the acoustic detector comprises piezoelectric crystal quartz. The quartz is preferably in the shape of a tuning fork.
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Conley & Rose, P.C.
Lauchman Layla G.
Valentin, II Juan D.
William Marsh Rice University
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