发明名称 |
Film scanner with compensation for film shrinkage |
摘要 |
The invention is concerned with a means of compensating for film shrinkage in a continuous film motion telecine apparatus. A measure of the film shrinkage is obtained by deriving a signal representing the angular speed of a roller in non-slipping contact with the film, the film being driven at a constant frame rate by, for example, a smooth capstan servo-controlled to maintain the constant frame rate. The roller whose angular speed is measured may be the drive capstan itself or a separate roller. The signal so derived is dependent on the film shrinkage and thus is used to automatically control a registration adjusting means to compensate for such shrinkage.
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申请公布号 |
US4054912(A) |
申请公布日期 |
1977.10.18 |
申请号 |
US19760675590 |
申请日期 |
1976.04.09 |
申请人 |
THE RANK ORGANISATION LIMITED |
发明人 |
MILLWARD, JOHN DAVID;WRIGHT, JOHN |
分类号 |
H04N5/253;H04N3/36;H04N3/38;(IPC1-7):H04N3/36;H04N5/36 |
主分类号 |
H04N5/253 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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