Frequency-encoded focussed image hologram record
    11.
    发明授权
    Frequency-encoded focussed image hologram record 失效
    频率编码聚焦图像全息图记录

    公开(公告)号:US3917378A

    公开(公告)日:1975-11-04

    申请号:US46921874

    申请日:1974-05-13

    Applicant: RCA CORP

    CPC classification number: G03H1/26 G02B5/1842

    Abstract: A hologram comprising three superimposed parallel diffraction gratings, each modulated by a different primary color component of an imaged object and having a different spatial frequency related to that component, is embossed in a suitable record such that at least one of the gratings is rotated with respect to the other two. The coarsest beat frequency in ''''multi-color'''' areas of the hologram is thereby increased over that for a hologram comprising mutually-parallel gratings, whereby the resolution of the hologram-as observed in a focussed image hologram projectoris similarly increased.

    Abstract translation: 包括三个叠加的平行衍射光栅的全息图,其每一个由成像对象的不同原色分量调制并具有与该分量相关的不同的空间频率,被压印在合适的记录中,使得至少一个光栅相对于 到另外两个。 因此,全息图的“多色”区域中的最粗糙的拍频,比包括相互平行的光栅的全息图的频率更高,由此在聚焦图像全息投影仪中观察到的全息图的分辨率也同样增加。

    Asymmetrically excited semiconductor injection laser
    13.
    发明授权
    Asymmetrically excited semiconductor injection laser 失效
    非对称激光半导体注入激光器

    公开(公告)号:US3916339A

    公开(公告)日:1975-10-28

    申请号:US52705374

    申请日:1974-11-25

    Applicant: RCA CORP

    CPC classification number: H01S5/0425 H01S5/0421 H01S5/223 H01S5/305

    Abstract: A diode laser is improved in order to produce an output in a single longitudinal mode. The laser has a rectangular body with two regions of differing conductivity type material. Extending from one surface of the rectangular body and into one of the regions of differing conductivity material is a third region. Although the third region is composed of the same general conductivity type material as the region into which it extends, it is more highly doped with conductivity modifiers (more conductive). This third region extends along one surface between the ends of the body and is spaced from the sides of the body. An electrical contact stripe is positioned on the one surface so that a portion of its width overlaps a portion of the width of the third region.

    Abstract translation: 改进二极管激光器以便在单个纵向模式中产生输出。 激光器具有具有不同导电类型材料的两个区域的矩形体。 从矩形体的一个表面延伸到不同导电性材料的区域之一中的是第三区域。 虽然第三区域由与其延伸的区域相同的一般导电类型的材料组成,但是它更加掺杂有导电性改性剂(更具导电性)。 该第三区域沿主体的端部之间的一个表面延伸并且与主体的侧面间隔开。 电接触条被定位在一个表面上,使得其宽度的一部分与第三区域的宽度的一部分重叠。

    Direct current protection circuit
    15.
    发明授权
    Direct current protection circuit 失效
    直流电流保护电路

    公开(公告)号:US3912977A

    公开(公告)日:1975-10-14

    申请号:US47178374

    申请日:1974-05-20

    Applicant: RCA CORP

    CPC classification number: H02H3/243 G04G9/0047 G09G3/18 H02H3/50

    Abstract: When the oscillator which supplies the alternating drive voltage for a liquid crystal display fails, the circuit of the present application removes the direct current operating voltage from the liquid crystal driver transistors. The oscillator drives a voltage converter which produces the operating voltage. A transistor in series with the line carrying the operating voltage is controlled by the operating voltage developed by the converter so that when the oscillator fails and the converter goes off, the transistor cuts off.

    Color picture/sound record
    16.
    发明授权
    Color picture/sound record 失效
    彩色图片/声音记录

    公开(公告)号:US3911476A

    公开(公告)日:1975-10-07

    申请号:US44106974

    申请日:1974-02-11

    Applicant: RCA CORP

    CPC classification number: H04N9/85 H04N5/7605

    Abstract: An information track of a color-picture sound disc comprises geometric variations in the bottom of a spiral groove, the variations having alternations between a first cross-sectional shape in which the groove bottom and adjacent groove walls define a continuous smooth curve and a second cross-sectional shape in which the groove bottom is depressed relative to the groove bottom level associated with the first cross-sectional shape. Recording apparatus for use in the mastering of such a color picture/sound disc and playback apparatus are also disclosed.

    Abstract translation: 彩色图像声盘的信息轨道包括螺旋槽底部的几何变化,该变化在第一横截面形状之间具有交替,在该第一横截面形状中,凹槽底部和相邻凹槽壁限定了连续平滑曲线,第二十字形 其中凹槽底部相对于与第一横截面形状相关联的凹槽底部水平面压下的截面形状。

    Direction indicating display system
    19.
    发明授权
    Direction indicating display system 失效
    方向指示显示系统

    公开(公告)号:US3909691A

    公开(公告)日:1975-09-30

    申请号:US40478173

    申请日:1973-10-09

    Applicant: RCA CORP

    CPC classification number: H01Q3/005

    Abstract: A direction indicating display for a rotator assembly is achieved by four lights with each light indicating one of the four compass directions of north, south, east and west and by control of the current through these lights using diode rectifiers, spaced conductive strips and rotating contactors.

    Abstract translation: 旋转器组件的方向指示显示是通过四个灯实现的,每个灯指示北,南,东,西四个罗盘方向之一,并且通过使用二极管整流器,间隔开的导电条和旋转接触器来控制通过这些灯的电流 。

    Signal switching apparatus for compensating record defects
    20.
    发明授权
    Signal switching apparatus for compensating record defects 失效
    用于补偿记录缺陷的信号开关装置

    公开(公告)号:US3909518A

    公开(公告)日:1975-09-30

    申请号:US47710374

    申请日:1974-06-06

    Applicant: RCA CORP

    CPC classification number: H04N9/882

    Abstract: In a defect compensation system for a video disc player, stretched versions of defect indication pulses are obtained in a switching control signal generator employing an envelope detector, and a comparator referencing the detector output against a selected threshold voltage. A pair of complementary outputs developed by the comparator are applied to the bases of a pair of serially disposed transistors in respective normal and substitution signal channels, driving one to cutoff and the other to inverted mode saturation, or vice versa.

    Abstract translation: 在用于视盘播放机的缺陷补偿系统中,在采用包络检测器的开关控制信号发生器中获得缺陷指示脉冲的延伸版本,以及参考所选择的阈值电压的检测器输出的比较器。 由比较器开发的一对互补输出被施加到相应的正常和替换信号通道中的一对串联设置的晶体管的基极,驱动一个到截止,另一个转换为反相模式饱和,反之亦然。

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