Techniques for optically compressing light intensity ranges

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:866892

Rushford, Michael C ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4815828
• OSTI ID: 866892
• Country of Publication: United States
• Language: English

Related Subjects

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
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