Optical protective screen with improved visibility
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United States of America Patent
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Jun 13, 2000
Grant Date -
N/A
app pub date -
Mar 12, 1999
filing date -
Sep 13, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical protective screen for improved visibility is provided including an electric motor for moving a transparent sheet or film in a transport direction, which sheet or film is disposed in a field of vision of an optical apparatus or human observer. A cleaning mechanism formed from brushes or squeegees or the like, which are oriented generally transversely to the transport direction of the sheet or film are, disposed on at least one side of the field of vision and are applied against said sheet or film to clean it.
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