Cone penetrometer fiber optic raman spectroscopy probe assembly

Patent · Sat Jan 01 04:00:00 EST 2000

OSTI ID:872829

Kyle, Kevin R ^[1]; Brown, Steven B ^[2]

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1. Brentwood, CA
2. Livermore, CA

A chemically and mechanically robust optical Raman spectroscopy probe assembly that can be incorporated in a cone penetrometer (CPT) for subsurface deployment. This assembly consists of an optical Raman probe and a penetrometer compatible optical probe housing. The probe is intended for in-situ chemical analysis of chemical constituents in the surrounding environment. The probe is optically linked via fiber optics to the light source and the detection system at the surface. A built-in broadband light source provides a strobe method for direct measurement of sample optical density. A mechanically stable sapphire window is sealed directly into the side-wall of the housing using a metallic, chemically resistant, hermetic seal design. This window permits transmission of the interrogation light beam and the resultant signal. The spectroscopy probe assembly is capable of accepting Raman, Laser induced Fluorescence, reflectance, and other optical probes with collimated output for CPT deployment.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 6018389
• OSTI ID: 872829
• Country of Publication: United States
• Language: English

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accepting
analysis
assembly
assembly consists
band light
beam
broadband
built-in
capable
chemical
chemical analysis
chemically
collimated
collimated output
compatible
cone
cone penetrometer
consists
constituents
cpt
density
deployment
design
detection
direct
direct measure
direct measurement
directly
environment
fiber
fiber optic
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fluorescence
hermetic
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housing
in-situ
in-situ chemical
incorporated
induced
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intended
interrogation
laser
laser induced
light
light beam
light source
linked
measurement
mechanically
mechanically robust
mechanically stable
metallic
method
optic
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optical density
optical probe
optically
optics
output
penetrometer
permits
probe
probe assembly
probes
provides
raman
raman spectroscopy
reflectance
resistant
resultant
resultant signal
robust
sample
sapphire
seal
seal design
sealed
side-wall
signal
source
source provides
spectroscopy
spectroscopy probe
stable
strobe
subsurface
surface
surrounding
surrounding environment
transmission
via
via fiber
window