Protective optical filter assembly
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United States of America Patent
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Jul 19, 2005
Grant Date -
Jul 17, 2003
app pub date -
Aug 20, 2002
filing date -
Jan 15, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A protective optical filter assembly for thin film filters having two transparent substrates facing one another and separated by a resilient element, a sealed region is formed between the transparent substrates by applying a compressive force that compresses the resilient element. The thin film filter may be contained within a carrier. The compressive force may be generated by one or more interference-fit aperture rings or threaded apertures ring, a given aperture ring may be opposed by another such aperture ring or a fixed stop. Alternatively a snap fit carrier may be used to generate the compressive force. The sealed region may have a gas having a positive pressure or a liquid.
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