Global to push GA events into
skip to main content

Title: Faraday imaging at high temperatures

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:
OSTI Identifier:
458587
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 050500; 440600; PA: EDB-97:053779; SN: 97001758988
Patent Number(s):
US 5,612,538/A/
Application Number:
PAN: 8-373,994; TRN: 97:006791
Contract Number:
W-7405-ENG-48
Resource Relation:
Other Information: PBD: 18 Mar 1997
Research Org:
University of California
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