Television – Special applications
Patent
1992-06-30
1995-02-07
Mancuso, Joseph
Television
Special applications
348231, 348203, H04N 5225
Patent
active
053879260
ABSTRACT:
The present invention provides a system for recording images occurring both before and after a triggering event. Temporarily stored images are continually refreshed, the most recent images replacing the oldest images, providing a continuously updated history of recent events in a memory configured as an endless loop. Upon receipt of an external trigger, a predetermined further quantity of temporary images are stored until the capacity of the temporary storage medium is reached and then all temporarily stored images are then permanently stored. The system includes a rotating polygon mirror which produces a sequence of image scan lines. A lens system focuses the scan lines onto a linear array of photodetectors. Transient digitizers or a CCD linear storage array temporarily stores image data received from the photodetectors. Upon receipt of a trigger, the temporarily stored images are transferred to permanent digital memory after a predetermined further quantity of images have been stored.
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California Institute of Technology
Greening Wendy R.
Mancuso Joseph
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