Optics: measuring and testing – Sample – specimen – or standard holder or support – Fluid containers
Patent
1991-01-16
1992-12-01
McGraw, Vincent P.
Optics: measuring and testing
Sample, specimen, or standard holder or support
Fluid containers
250576, G01N 2105
Patent
active
051683679
ABSTRACT:
A compact, variable pathlength, fiber optic probe for spectrophotometric measurements of fluids in situ. The probe comprises a probe body with a shaft having a polished end penetrating one side of the probe, a pair of optic fibers, parallel and coterminous, entering the probe opposite the reflecting shaft, and a collimating lens to direct light from one of the fibers to the reflecting surface of the shaft and to direct the reflected light to the second optic fiber. The probe body has an inlet and an outlet port to allow the liquid to enter the probe body and pass between the lens and the reflecting surface of the shaft. A linear stepper motor is connected to the shaft to cause the shaft to advance toward or away from the lens in increments so that absorption measurements can be made at each of the incremental steps. The shaft is sealed to the probe body by a bellows seal to allow freedom of movement of the shaft and yet avoid leakage from the interior of the probe.
REFERENCES:
patent: 2649011 (1953-08-01), Black
patent: 4023909 (1977-05-01), Ross
patent: 4786171 (1988-11-01), LeFebre et al.
patent: 4988155 (1991-01-01), Harner et al.
patent: 5036194 (1991-07-01), Hazel
Haggard Ricky A.
McCarty Jerry E.
O'Rourke Patrick E.
Constant Richard E.
Dixon Harold M.
McGraw Vincent P.
Moser William R.
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