Optics: measuring and testing – Sample – specimen – or standard holder or support – Fluid containers
Patent
1993-09-13
1995-08-15
Rosenberger, Richard A.
Optics: measuring and testing
Sample, specimen, or standard holder or support
Fluid containers
G01N 2105
Patent
active
054424372
ABSTRACT:
A flow cell and probe member apparatus for a spectrophotometer type analyzer for fluids such as petroleum fuel blends using the absorbance characteristics of electromagnetic radiation in the ultra violet/visible light
ear infrared portion of the spectrum includes a body having opposed branch parts which define a flow passage for the fluid to be analyzed and including opposed connector parts for connecting the body to fluid transmitting conduits. Opposed waveguide probes project into the flow path from opposed supporting branch parts of the cell body which have opposed surfaces which are spaced apart at a predetermined distance to locate the probe members in such a way that the transmission path length of the radiation signal is closely controlled to minimize errors in the absorbance readings. Each of the probe members includes a waveguide portion including a light transmitting window having a self-cleaning surface formed thereon which is held a predetermined distance from a surface on the probe member body which is engageable with the locating surface on the cell body.
REFERENCES:
patent: 4664522 (1987-05-01), LeFebre
patent: 4988155 (1991-01-01), Harner et al.
patent: 5078493 (1992-01-01), Evens et al.
patent: 5140169 (1992-08-01), Evens et al.
David A. LeFebre and George P. Thomas, "An In-Line Scanning UV-VIS-NIR Process Monitor"; ISA 1985-Paper #85-0033.
Atlantic Richfield Company
Martin Michael E.
Rosenberger Richard A.
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