公开(公告)号：US3969574A

公开(公告)日：1976-07-13

申请号：US464852

申请日：1974-04-29

申请人： Peter Johannes Michiel Janssen ,  Gerard Eduard VAN Rosmalen

发明人： Peter Johannes Michiel Janssen ,  Gerard Eduard VAN Rosmalen

IPC分类号： G11B21/08 ,  G11B7/085 ,  G11B7/09 ,  G11B7/12 ,  H02K41/035 ,  H02P25/02 ,  H04N5/76 ,  G11B17/00 ,  G11B21/10

CPC分类号： G11B7/12 ,  G11B7/08582 ,  G11B7/0929 ,  H02K41/0356 ,  H02P25/034

摘要： A device for writing information in a disk-shaped record carrier, and/or for reproducing the recorded information, the transducer being radially movable relative to the record carrier, which transducer is disposed on a tubular member, which at its one end is provided with a drive coil and at its other end with a tachometer coil, which coils are movable in an air gap of a stationary magnet system.

摘要翻译： 一种用于在盘形记录载体中写入信息和/或用于再现所记录的信息的装置，所述换能器可相对于记录载体径向移动，所述换能器设置在管状构件上，该管状构件的一端设置有 驱动线圈，其另一端具有转速计线圈，该线圈可在固定磁体系统的气隙中移动。

公开(公告)号：US4060248A

公开(公告)日：1977-11-29

申请号：US583987

申请日：1975-06-05

申请人： Herman Gerard Lakerveld ,  Gerard Eduard VAN Rosmalen ,  Kornelis Bulthius ,  Johannes Petrus Sinjou

发明人： Herman Gerard Lakerveld ,  Gerard Eduard VAN Rosmalen ,  Kornelis Bulthius ,  Johannes Petrus Sinjou

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B15/66 ,  G11B17/032 ,  G11B25/04 ,  G11B7/24 ,  H04N1/28

CPC分类号： G11B17/032 ,  G11B7/0037

摘要： A playing apparatus, more specifically a video player for playing round records with a central hole, which are made of a transparent material, which records at one side have a transparent surface and at their other side are provided with information tracks which are optically readable with the aid of a read beam, which tracks are covered by a light-reflecting layer. In order to enable both relatively thick rigid records and relatively thin flexible records to be played on one playing apparatus, the invention provides a transparent adapter disc, which together with a flexible record can be positioned on the playing apparatus and driven in a rotary fashion. In order to prevent dust particles from being trapped between the flexible record and the transparent adapter disc, the adapter disc may be provided with a central recess with a number of air admission apertures at the circumference thereof, so that during operation a thin film of air is formed between the flexible record and the adapter disc.

摘要翻译： 更具体地说，用于播放具有中心孔的圆形记录的视频播放器，其由透明材料制成，其一侧记录有透明表面，并且在另一侧具有光学可读的信息轨道 读取光束的帮助，其中光道被光反射层覆盖。 为了使相对厚的刚性记录和相对薄的灵活记录能够在一个播放装置上播放，本发明提供一种透明适配盘，其与柔性记录一起可以定位在播放装置上并以旋转方式驱动。 为了防止灰尘颗粒被捕获在柔性记录和透明适配盘之间，适配盘可以在其圆周处设置有具有多个进气孔的中心凹部，使得在操作期间，薄膜空气 形成在柔性记录和适配盘之间。

公开(公告)号：US4063287A

公开(公告)日：1977-12-13

申请号：US660498

申请日：1976-02-23

申请人： Gerard Eduard VAN Rosmalen

发明人： Gerard Eduard VAN Rosmalen

IPC分类号： G02B26/10 ,  G02B7/18 ,  G02B7/182 ,  G11B7/08 ,  G11B7/09 ,  H04N5/85 ,  H04N5/76 ,  H04N1/24

CPC分类号： G11B7/09 ,  G02B7/1821

摘要： A tracking mirror device, in particular for a video disc player, in which for following an information track on a video disc with a beam of radiation, use is made of a mirror which oscillates at a high frequency, which causes the beam of radiation, which serves for scanning the information track, to oscillate transversely to the information track at a high frequency and a small amplitude, while the filtered out high-frequency signal, as a function of its amplitude and its phase relationship with the high frequency voltage which is applied to the oscillating mirror, yields a control signal for following the information track. In accordance with the invention, use is made of an oscillating mirror which is driven electromagnetically and which is connected to oscillation compensation elements by means of springs which elements oscillate in phase opposition to the mirror. Thus, an oscillator mirror is obtained which can readily be excited to natural resonance and thus requires little power. On the mirror a piezo-electric miniature acceleration transducer can be mounted, which can provide a feedback signal so that the oscillating mirror can be included in a self-oscillating circuit.

摘要翻译： 用于跟踪具有辐射束的视频盘上的信息轨迹的特别是用于视频盘播放器的跟踪反射镜装置使用以高频振荡的反射镜，该反射镜导致辐射束， 其用于扫描信息轨道，以高频和小振幅横向振荡信息轨道，而滤出的高频信号作为其幅度的函数及其与高频电压的相位关系 施加到振荡反射镜，产生跟随信息轨迹的控制信号。 根据本发明，使用通过电磁驱动的振荡反射镜，该振荡反射镜通过弹簧与振荡补偿元件连接，所述弹簧与反射镜相反地摆动。 因此，获得可以容易地激发到自然共振并因此需要很少功率的振荡镜。 在镜子上，可以安装压电微型加速度传感器，可以提供反馈信号，使得振荡镜可以包含在自振荡电路中。

公开(公告)号：US3969575A

公开(公告)日：1976-07-13

申请号：US530167

申请日：1974-12-06

申请人： Gerrit Berend Gerritsen ,  Gerard Eduard VAN Rosmalen

发明人： Gerrit Berend Gerritsen ,  Gerard Eduard VAN Rosmalen

IPC分类号： G03B13/36 ,  G02B3/00 ,  G02B3/08 ,  G02B7/28 ,  G02B7/32 ,  G02B27/40 ,  G11B7/09 ,  G11B7/12 ,  G01V1/04

CPC分类号： G02B27/40 ,  G02B3/08 ,  G11B7/0908 ,  G11B7/0917 ,  G11B2007/0924

摘要： In an opto-electronic focus detection system for determining a deviation between the plane of focussing of an objective and a radiation-reflecting surface the path of a focussing beam which is reflected by said surface includes an assembly of two radiation-sensitive detection elements. The difference in the output signals of said elements is proportional to said deviation. By disposing a lenslike element of which only the outer zone has a lens action before the detection elements, the measuring range can be extended while maintaining the sensitivity for small deviations.

摘要翻译： 在用于确定物镜的聚焦平面与辐射反射表面之间的偏差的光电焦点检测系统中，由所述表面反射的聚焦光束的路径包括两个辐射敏感检测元件的组件。 所述元件的输出信号的差异与所述偏差成比例。 通过在检测元件之前设置只有外部区域具有透镜作用的透镜状元件，可以在保持小偏差的灵敏度的同时延长测量范围。