Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1996-08-22
1998-03-31
Allen, Stephone B.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
25055929, 348 97, 348106, 352224, H04N 5253
Patent
active
057341710
ABSTRACT:
A telecine scanner includes a device for determining and automatically correcting vertical and horizontal picture steadiness errors (film weave correction) during continuous-motion film drive scanning. To perform an optimum film weave correction, correction signals are derived from photosensors (11 and 13) arranged in the area of the film gate and scanning the sprocket holes during the entire scanning period of each film frame. The photosensor (11) provided for vertical correction includes a plurality of photoelements arranged transversely to the film drive direction and substantially corresponding to the number of television lines per film frame. The photosensor (13) provided for horizontal correction includes a plurality of photoelement sectors (14 to 21) arranged along the film edge, the photoelement sectors being smaller than a sprocket hole.
REFERENCES:
patent: 4104680 (1978-08-01), Holland
patent: 4875102 (1989-10-01), Poetsch et al.
patent: 4903131 (1990-02-01), Lingemann et al.
patent: 5266979 (1993-11-01), Brown et al.
patent: 5600450 (1997-02-01), Kaye et al.
Allen Stephone B.
Goodman Edward W.
U.S. Philips Corporation
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