Techniques for optically compressing light intensity ranges

Title: Techniques for optically compressing light intensity ranges

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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:

Rushford, Michael C. ^[1]

(Livermore, CA)

Issue Date:: 1989-01-01

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

OSTI Identifier:: 866892

Patent Number(s):: 4815828

Assignee:: United States of America as represented by United States (Washington, DC) LLNL

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/

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                    Rushford, Michael C. Techniques for optically compressing light intensity ranges.  United States: N. p., 1989. 
        Web.

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                    Rushford, Michael C. Techniques for optically compressing light intensity ranges.  United States.

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                    Rushford, Michael C. Sun .  
        "Techniques for optically compressing light intensity ranges".  United States.  https://www.osti.gov/servlets/purl/866892.

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@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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