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2. 发明授权

US4216357A Optical play-back system for recorded signals with oscillating beam 失效
标题翻译：用于具有振荡光束的记录信号的光学回放系统
公开(公告)号：US4216357A
公开(公告)日：1980-08-05
申请号：US743661
申请日：1976-11-22
申请人： Norio Iwasaki , Toshio Satoh , Hiroyuki Ito , Ikuya Koike
发明人： Norio Iwasaki , Toshio Satoh , Hiroyuki Ito , Ikuya Koike
IPC分类号： G11B3/095 , G10H1/18 , G10H5/00 , G11B7/00 , G11B7/003 , G11B7/005 , G11B7/09 , H04N5/76 , H04N5/85 , G11B11/00 , G11B7/12
CPC分类号： G11B7/0925 , G10H1/34 , G10H3/06 , G11B7/09
摘要： This invention relates to a system for optically playing back recorded signals from a recorded medium on which signals of images or sounds are continuously recorded so as to constitute a signal recorded line or signal track. In play-back the images or sounds are optically recognized by the width-change of the signal recorded line. A narrow light beam for the play-back is deflected at a predetermined frequency in the direction perpendicular to the signal recorded line, i.e. in the direction of the width of the signal recorded line, in order to perform the optical scanning. The narrow light beam which is reflected or transmitted on the recorded medium surface reaches photo-sensitive elements such as photo-diodes. Electrical outputs obtained from the photo-sensitive elements are relatively compared with electric signals (standard pulses) obtained from fundamental electric signals for deflecting the said narrow light beam at a predetermined frequency, so that the amplitude of the recorded signal at each differential point of the signal recorded line is continuously detected as length-amount, and a modulated wave is continuously obtained from the length-amount. The modulated wave is further decoded, compensated, and amplified so as to obtain the play-back signals corresponding to the continuous width-change of the signal recorded line. The play-back system is provided with a tracking mechanism by which the play-back mechanism can follow the signal recorded line, and an interval adjusting mechanism for maintaining the vertical interval between the play-back mechanism and the signal recorded line uniform.
摘要翻译：本发明涉及一种用于光学地从记录介质上重放记录的信号的系统，其上连续地记录有图像或声音的信号，以构成信号记录的行或信号轨道。在播放时，图像或声音由信号记录行的宽度变化而被光学识别。用于播放的窄光束在垂直于信号记录线的方向上，即在信号记录行的宽度方向上以预定频率偏转，以执行光学扫描。在记录介质表面上被反射或透射的窄光束到达光敏元件如光电二极管。从光敏元件获得的电输出与从基本电信号获得的电信号（标准脉冲）相比较，用于以预定频率偏转所述窄光束，使得在每个差分点处的记录信号的幅度信号记录线被连续检测为长度量，并且从长度量连续地获得调制波。调制波被进一步解码，补偿和放大，以获得与信号记录行的连续宽度变化相对应的重放信号。回放系统设置有跟踪机构，通过该跟踪机构，回放机构可以跟随信号记录线，以及间隔调整机构，用于保持回放机构和信号记录线之间的垂直间隔均匀。

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