Optic system for a down hole camera assembly
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United States of America Patent
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-
May 21, 1996
Issued Date -
N/A
app pub date -
Oct 4, 1993
filing date -
Jan 31, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optic system is provided for a down hole camera. The system includes an elongated tubular housing constructed from thermal insulating material. A front lens group and rear lens group are mounted within the housing adjacent opposite ends. The front and rear lens groups are thermally isolated from one another through the provision of two spaced windows therebetween that extend across and seal a light pathway running through the tubular housing. Preferably, the windows are sealingly mounted within the housing so as to define a vacuum chamber therebetween within the wall of the housing.
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Cited Art Landscape
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