Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1990-10-12
1991-09-24
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250343, G01N 2135, G01N 2185
Patent
active
050515519
ABSTRACT:
A probe is disclosed for use in internal reflection spectroscopy at locations immersed in containers. Two parallel light pipes, located inside the probe, are used to carry radiation toward and away from an internal reflectance element (IRE) located at or near the bottom of the probe. The IRE, which is exposed to analyte in the container, has a radiation-entering surface and a radiation-exiting surface which permit collimated radiation to fill both light pipes. No beamsplitter is required to separate pre-sample and post-sample radiation. In one embodiment the IRE is a rod having concave conical entering and exiting surfaces, and a separate radiation-direction-reversing element is mounted on the tip of the probe. In another embodiment the IRE is itself a direction-reversing means mounted on the tip of the probe.
REFERENCES:
patent: 3164663 (1965-01-01), Gale
patent: 3370502 (1968-02-01), Wilks, Jr.
patent: 3751672 (1973-08-01), Michel et al.
patent: 4595833 (1986-06-01), Sting
patent: 4826313 (1989-05-01), Schar et al.
The Infrared Handbook, Revised Edition, Environmental Research Institute of Michigan, 1985, pp. 9.12-9.13.
Axiom Analytical, Inc.
Glick Edward J.
Hannaher Constantine
Plante Thomas J.
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