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    • 1. 发明授权
    • Film scanner
    • 电影扫描仪
    • US3825679A
    • 1974-07-23
    • US33818273
    • 1973-03-05
    • MITSUBISHI ELECTRIC CORP
    • FARRELL GKOTO NHIRAI NTSUJI AHASIMOTO D
    • H04N3/38H04N5/36
    • H04N3/38
    • The disclosed system includes a flying-spot scanner tube selectively operative with frame frequencies of 50 and 60 hertz, and a capstan for driving a record film at the synchronous speed of an associated synchronous motor selectively supplied with 50 and 60 hertz power. Only those record films having 50 frames recorded with video information per second are provided on the leader with an aluminum piece. Upon reproducing one of these films the aluminum piece contacts a guide roller which causes the system to switch to the 50 frame mode of operation. At the end of the rewinding of the reproduced film, the aluminum piece again contacts the guide roller to return the system to the normal mode of operation in which record films with 60 frames per second can be reproduced.
    • 所公开的系统包括选择性地以50和60赫兹的帧频率操作的飞点扫描器管,以及用于以选择性地提供50和60赫兹功率的相关同步电动机的同步速度驱动记录膜的主导轴。 只有具有50帧记录的每秒视频信息的记录胶片才能在铝片上提供。 在再现这些膜中的一个时,铝片接触导辊,导致系统切换到50帧操作模式。 在再生膜的倒带结束时,铝片再次接触导辊,使系统恢复到正常的操作模式,其中可以再现每秒60帧的记录膜。