Light absorption cell combining variable path and length pump
Abstract
A device for use in making spectrophotometric measurements of fluid samples. In particular, the device is a measurement cell containing a movable and a fixed lens with a sample of the fluid therebetween and through which light shines. The cell is connected to a source of light and a spectrophotometer via optic fibers. Movement of the lens varies the path length and also pumps the fluid into and out of the cell. Unidirectional inlet and exit valves cooperate with the movable lens to assure a one-way flow of fluid through the cell. A linear stepper motor controls the movement of the lens and cycles it from a first position closer to the fixed lens and a second position farther from the fixed lens, preferably at least 10 times per minute for a nearly continuous stream of absorption spectrum data.
- Inventors:
-
- 2419 Dickey Rd., Augusta, GA 30906
- Issue Date:
- Research Org.:
- Savannah River Site (SRS), Aiken, SC (United States)
- OSTI Identifier:
- 869058
- Patent Number(s):
- 5268736
- Assignee:
- Prather, William S. (2419 Dickey Rd., Augusta, GA 30906)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- AC09-89SR18035
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- light; absorption; cell; combining; variable; path; length; pump; device; spectrophotometric; measurements; fluid; samples; particular; measurement; containing; movable; fixed; lens; sample; therebetween; shines; connected; source; spectrophotometer; via; optic; fibers; movement; varies; pumps; unidirectional; inlet; exit; valves; cooperate; assure; one-way; flow; linear; stepper; motor; controls; cycles; position; closer; farther; preferably; 10; times; minute; nearly; continuous; stream; spectrum; data; continuous stream; spectrophotometric measurements; fluid sample; optic fiber; stepper motor; path length; cell containing; fluid samples; absorption spectrum; light absorption; optic fibers; motor control; spectrum data; variable path; cell contain; via optic; absorption cell; /356/250/
Citation Formats
Prather, William S. Light absorption cell combining variable path and length pump. United States: N. p., 1993.
Web.
Prather, William S. Light absorption cell combining variable path and length pump. United States.
Prather, William S. Fri .
"Light absorption cell combining variable path and length pump". United States. https://www.osti.gov/servlets/purl/869058.
@article{osti_869058,
title = {Light absorption cell combining variable path and length pump},
author = {Prather, William S},
abstractNote = {A device for use in making spectrophotometric measurements of fluid samples. In particular, the device is a measurement cell containing a movable and a fixed lens with a sample of the fluid therebetween and through which light shines. The cell is connected to a source of light and a spectrophotometer via optic fibers. Movement of the lens varies the path length and also pumps the fluid into and out of the cell. Unidirectional inlet and exit valves cooperate with the movable lens to assure a one-way flow of fluid through the cell. A linear stepper motor controls the movement of the lens and cycles it from a first position closer to the fixed lens and a second position farther from the fixed lens, preferably at least 10 times per minute for a nearly continuous stream of absorption spectrum data.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}