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Title: Faraday imaging at high temperatures

Abstract

A Faraday filter rejects background light from self-luminous thermal objects, but transmits laser light at the passband wavelength, thus providing an ultra-narrow optical bandpass filter. The filter preserves images so a camera looking through a Faraday filter at a hot target illuminated by a laser will not see the thermal radiation but will see the laser radiation. Faraday filters are useful for monitoring or inspecting the uranium separator chamber in an atomic vapor laser isotope separation process. Other uses include viewing welds, furnaces, plasma jets, combustion chambers, and other high temperature objects. These filters are can be produced at many discrete wavelengths. A Faraday filter consists of a pair of crossed polarizers on either side of a heated vapor cell mounted inside a solenoid. 3 figs.

Inventors:
;
Issue Date:
Research Org.:
University of California
OSTI Identifier:
458587
Patent Number(s):
5,612,538
Application Number:
PAN: 8-373,994; TRN: 97:006791
Assignee:
Univ. of California, Oakland, CA (United States)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 18 Mar 1997
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; OPTICAL FILTERS; LASER ISOTOPE SEPARATION; THERMAL RADIATION; LASER RADIATION; CAMERAS; INSPECTION; USES; SEPARATION EQUIPMENT

Citation Formats

Hackel, L A, and Reichert, P. Faraday imaging at high temperatures. United States: N. p., 1997. Web.
Hackel, L A, & Reichert, P. Faraday imaging at high temperatures. United States.
Hackel, L A, and Reichert, P. Tue . "Faraday imaging at high temperatures". United States.
@article{osti_458587,
title = {Faraday imaging at high temperatures},
author = {Hackel, L A and Reichert, P},
abstractNote = {A Faraday filter rejects background light from self-luminous thermal objects, but transmits laser light at the passband wavelength, thus providing an ultra-narrow optical bandpass filter. The filter preserves images so a camera looking through a Faraday filter at a hot target illuminated by a laser will not see the thermal radiation but will see the laser radiation. Faraday filters are useful for monitoring or inspecting the uranium separator chamber in an atomic vapor laser isotope separation process. Other uses include viewing welds, furnaces, plasma jets, combustion chambers, and other high temperature objects. These filters are can be produced at many discrete wavelengths. A Faraday filter consists of a pair of crossed polarizers on either side of a heated vapor cell mounted inside a solenoid. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {3}
}