Automatic transparency masking
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 30, 2001
Issued Date -
N/A
app pub date -
Oct 30, 1997
filing date -
May 5, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for viewing transparencies comprising backlighting a transparency with polarized light and viewing the transparency through a polarizer. Preferably, the polarization axis of the backlighting and the polarization axis of the polarizer are oriented at about 90 degrees to each other. The transparency is oriented so that a substantial amount of polarized backlighting passes through the transparency and the polarizer. Also disclosed are apparatus for viewing a transparency using polarized backlighting.
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