公开(公告)号：US3842194A

公开(公告)日：1974-10-15

申请号：US12677271

申请日：1971-03-22

Applicant: RCA CORP

Inventor： CLEMENS JON KAUFMANN

IPC: G11B3/72 ,  G11B9/00 ,  G11B9/06 ,  G11B9/07 ,  G11B9/10 ,  G11B11/05 ,  H04N5/76 ,  G11B3/44 ,  G11B25/04

CPC classification number: H04N5/7605 ,  G11B9/00 ,  G11B9/061 ,  G11B11/05 ,  H04N5/903

Abstract: An information record employs a storage medium comprising a metallized base material having a dielectric coating thereon. The dimensions of an information track contained in a groove in the storage medium vary in accordance with recorded information. The capacitance between an electrode in a pickup tracking in said groove and the metallized surface of the storage medium varies in accordance with the modulated information track as the pickup device scans the recording medium. Circuitry responding to said capacitance variations provides an output signal corresponding to the information recorded. One application of such a system is to record, on both sides of a disc, video information which can be reproduced in form of a video display.

Abstract translation: 信息记录采用包括其上具有介电涂层的金属化基材的存储介质。 包含在存储介质中的凹槽中的信息轨道的尺寸根据记录的信息而变化。 随着拾取装置扫描记录介质，所述凹槽中跟踪的拾取器中的电极与存储介质的金属化表面之间的电容根据调制的信息轨迹而变化。 响应于所述电容变化的电路提供对应于记录的信息的输出信号。 这种系统的一个应用是在盘的两侧记录可以以视频显示的形式再现的视频信息。

公开(公告)号：US3909517A

公开(公告)日：1975-09-30

申请号：US42078273

申请日：1973-12-03

Applicant: RCA CORP

Inventor： CLEMENS JON KAUFMANN

IPC: G11B9/06 ,  G11B11/05 ,  H04N5/76 ,  G11B11/00 ,  G11B3/72

CPC classification number: G11B9/061 ,  G11B11/05 ,  H04N5/7605 ,  H04N5/903

Abstract: An information record employs a storage medium comprising a metallized base material having a dielectric coating thereon. The dimensions of an information track contained in a groove in the storage medium vary in accordance with recorded information pursuant to an information-representative pattern of relatively raised and depressed areas, the former constituting undisturbed regions of the groove bottom. The information track may comprise (1) an AM carrier pattern wherein a carrier frequency amplitude modulated by the video signals is represented by successive pairs of regions, a first region of each pair having the relative widths of a central depressed area and adjoining raised areas determined by video signal amplitude, and the succeeding region of each pair having the relative widths of a central raised area and adjoining depressed areas complementarily determined; or (2) a FM carrier pattern, wherein depressed areas extending across the width of the groove bottom alternate with raised areas extending across the width of the groove bottom, and the spacing between successive areas of the same type varies with video signal amplitude. The capacitance between an electrode in a pickup tracking in said groove and the metallized surface of the storage medium varies in accordance with the modulated information track as the pickup device scans the recording medium. Circuitry responding to said capacitance variations provides an output signal corresponding to the information recorded. One application of such a system is to record, on both sides of a disc, video information which can be reproduced in form of a video display.

Abstract translation: 信息记录采用包括其上具有介电涂层的金属化基材的存储介质。 包含在存储介质中的凹槽中的信息轨道的尺寸根据记录的信息根据相对凸起和凹陷区域的信息代表性图案而变化，前者构成凹槽底部的未扰动区域。 信息轨迹可以包括（1）AM载波图案，其中由视频信号调制的载波频率幅度由连续的区域对表示，每对的第一区域具有确定的中心凹陷区域和相邻凸起区域的相对宽度 通过视频信号幅度，并且每对的后续区域具有互补确定的中心凸起区域和相邻凹陷区域的相对宽度; 或（2）FM载体图案，其中延伸穿过凹槽底部的宽度的凹陷区域与在凹槽底部的宽度上延伸的凸起区域交替，并且相同类型的连续区域之间的间隔随着视频信号幅度而变化。 随着拾取装置扫描记录介质，所述凹槽中跟踪的拾取器中的电极与存储介质的金属化表面之间的电容根据调制的信息轨迹而变化。 响应于所述电容变化的电路提供对应于记录的信息的输出信号。 这种系统的一个应用是在盘的两侧记录可以以视频显示的形式再现的视频信息。

公开(公告)号：US3930117A

公开(公告)日：1975-12-30

申请号：US52331174

申请日：1974-11-14

Applicant: RCA CORP

Inventor： CLEMENS JON KAUFMANN ,  PALMER RICHARD CLAXTON

IPC: G11B3/46 ,  G11B9/07 ,  H04N5/92 ,  H04N5/76

CPC classification number: G11B9/075 ,  H04N5/9204

Abstract: A stylus support element of dielectric material (e.g., sapphire) has a tip formed with a tapering, flat rear face, having converging straight edges which terminate in a curved bottom edge. Sides of the support element tip extend in converging fashion toward a narrow stylus front, while a curved surface, extending forward from the bottom of the rear face with a gradually diminishing width, forms the bottom of the support element. The rear surface of the support element is coated with a thin layer of conductive material (e.g., hafnium) which forms a stylus electrode. Overlying the conductive layer is an additional layer of dielectric material (e.g., aluminum oxide) having a thickness which is large relative to the thickness of the conductive layer, but small relative to the length of the curved bottom of the stylus support element. In use of the stylus in video disc playback apparatus, the stylus tip is received in the groove of a disc having a conductive surface covered with a dielectric coating. As geometric variations of the groove bottom, representative of recorded picture and sound information, pass beneath the stylus, the capacitance between the stylus electrode and the disc''s conductive layer varies. The capacitance variations are converted to electrical signal variations representative of the recorded information. Presence of the dielectric overcoating on the stylus electrode establishes a degree of symmetry for the stylus response, that eliminates or reduces spurious effects of sound interference with picture information that may be encountered in the absence of the overcoating use.

Abstract translation: 电介质材料（例如，蓝宝石）的触笔支撑元件具有形成有锥形的平坦后表面的尖端，其具有终止于弯曲底部边缘的会聚的直边缘。 支撑元件尖端的边缘以会聚的方式朝向窄的触针前端延伸，而从背面的底部向前延伸并且逐渐减小的宽度的曲面形成支撑元件的底部。 支撑元件的后表面涂覆有形成触针电极的导电材料（例如铪）的薄层。 覆盖导电层是介电材料（例如，氧化铝）的附加层，其厚度相对于导电层的厚度大，但相对于触针支撑元件的弯曲底部的长度较小。 在使用视频光盘播放装置中的触控笔时，触控笔尖被接收在具有覆盖有电介质涂层的导电表面的盘的凹槽中。 由于表示记录图像和声音信息的凹槽底部的几何变化通过触针下方，触针电极和盘的导电层之间的电容变化。 电容变化被转换成表示记录信息的电信号变化。 在触针电极上存在电介质涂层可以确定触针响应的对称程度，消除或减少在没有外涂使用时可能遇到的图像信息的声音干扰的杂散效应。