Variable path length spectrophotometric probe
Abstract
This invention consists of 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.
- Inventors:
- Publication Date:
- Research Org.:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (United States)
- OSTI Identifier:
- 7108272
- Patent Number(s):
- PATENTS-US-A7641978
- Application Number:
- ON: DE92019834; PPN: US 7-641978
- Assignee:
- Dept. of Energy
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent Application
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; FLUIDS; SPECTROPHOTOMETRY; SPECTROPHOTOMETERS; DESIGN; FIBER OPTICS; INVENTIONS; OPTICAL FIBERS; PROBES; FIBERS; MEASURING INSTRUMENTS; 440600* - Optical Instrumentation- (1990-)
Citation Formats
O'Rourke, P E, McCarty, J E, and Haggard, R A. Variable path length spectrophotometric probe. United States: N. p., 1991.
Web.
O'Rourke, P E, McCarty, J E, & Haggard, R A. Variable path length spectrophotometric probe. United States.
O'Rourke, P E, McCarty, J E, and Haggard, R A. 1991.
"Variable path length spectrophotometric probe". United States.
@article{osti_7108272,
title = {Variable path length spectrophotometric probe},
author = {O'Rourke, P E and McCarty, J E and Haggard, R A},
abstractNote = {This invention consists of 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.},
doi = {},
url = {https://www.osti.gov/biblio/7108272},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1991},
month = {Tue Jan 01 00:00:00 EST 1991}
}