Techniques for optically compressing light intensity ranges
Abstract
A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten uranium in an atomic vapor laser isotope separator (AVLIS) system is disclosed herein. The assembly includes means for optically compressing the light intensity range appearing at its input sufficient to make it receivable and decipherable by a standard video camera. A number of different means for compressing the intensity range are disclosed. These include the use of photogray glass, the use of a pair of interference filters, and the utilization of a new liquid crystal notch filter in combination with an interference filter.
- Inventors:
-
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 866892
- Patent Number(s):
- 4815828
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- techniques; optically; compressing; light; intensity; ranges; camera; assembly; viewing; relatively; range; example; crucible; containing; molten; uranium; atomic; vapor; laser; isotope; separator; avlis; disclosed; means; appearing; input; sufficient; receivable; decipherable; standard; video; photogray; glass; pair; interference; filters; utilization; liquid; crystal; notch; filter; combination; containing molten; atomic vapor; interference filter; video camera; vapor laser; laser isotope; light intensity; liquid crystal; standard video; optically compressing; notch filter; molten uranium; intensity range; camera assembly; isotope separator; compressing light; crystal notch; intensity ranges; crucible containing; /349/250/359/
Citation Formats
Rushford, Michael C. Techniques for optically compressing light intensity ranges. United States: N. p., 1989.
Web.
Rushford, Michael C. Techniques for optically compressing light intensity ranges. United States.
Rushford, Michael C. Sun .
"Techniques for optically compressing light intensity ranges". United States. https://www.osti.gov/servlets/purl/866892.
@article{osti_866892,
title = {Techniques for optically compressing light intensity ranges},
author = {Rushford, Michael C},
abstractNote = {A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten uranium in an atomic vapor laser isotope separator (AVLIS) system is disclosed herein. The assembly includes means for optically compressing the light intensity range appearing at its input sufficient to make it receivable and decipherable by a standard video camera. A number of different means for compressing the intensity range are disclosed. These include the use of photogray glass, the use of a pair of interference filters, and the utilization of a new liquid crystal notch filter in combination with an interference filter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {1}
}
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