LENS MODULE COMPRISING AT LEAST ONE EXCHANGEABLE OPTICAL ELEMENT
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United States of America Patent
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app pub date -
Jul 11, 2017
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Dec 23, 2004
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Abstract
An optical system has a housing with a mount and an opening to a receiving region, the receiving region being located within the housing and including the mount. At least one optical element is inserted into and removed from the receiving region through the opening, and at least one gas supply device provides a flow of gas in the receiving region. An associated method of inserting or removing an optical element into or from a receiving region in a housing is also disclosed.
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