Method for making high-frame-rate CCD imaging devices from otherwise ordinary and inexpensive CCD devices
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United States of America Patent
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Jul 3, 2001
Grant Date -
N/A
app pub date -
Apr 24, 2000
filing date -
Apr 24, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fast frame-rate CCD imaging device is produced by modifying the optical mask of an otherwise ordinary and inexpensive CCD integrated circuit to darken a majority of the active imaging photocells. The modified CCD integrated circuit is operated at near its maximum horizontal and vertical clock rates, but multiple image frames are newly defined within the one previous active photocell array field. The added dark areas in the optical mask act to protect all recent frames still in transit within the active array area from being double exposed and thus corrupted. The serial output of the thus-modified CCD device is reinterpreted to include more frames than originally at a multiple equal to the original array dimension divided by the new array dimension (m.multidot.n/m'.multidot.n')
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