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    Optical Voltage-Electric Field Sensor
    1.
    发明专利
    Optical Voltage-Electric Field Sensor 未知

    公开(公告)号：CA2104978A1

    公开(公告)日：1994-03-01

    申请号：CA2104978

    申请日：1993-08-27

    Applicant: OKAJIMA HISAKAZU ,  YAMAMOTO MASANOBU

    Inventor： NGK INSULATORS LTD

    IPC: G01R15/24 ,  G01R19/00 ,  G02F1/03 ,  G01R29/12 ,  G01R15/07 ,  G01R29/08

    Abstract: An optical voltage.electric field sensor of the type which includes a light source (31), a polarizer (32) for linearly polarizing an incident light beam emanated from the light source, a phase plate (33) for applying a phase difference to the linearly polarized light beam, a Pockels element (34) for modulating the linearly polarized light beam applied with the phase differenc in accordance with a voltage or electric filed applied thereto, an analyzer (35) for separating the modulated light beam into a S-polarized light beam and a P-polarized light beam, a first light-receiving element (37a) arranged to receive the S-polarized light beam for converting the S-polarized light beam into a first electric signal V1 indicative of the intensity of the light beam, and a second light-receiving element (37b) arranged to receive the P-polarized light beam for converting the P-polarized light beam into a second electric signal V2 indicative of the intensity of the light beam. The sensor further includes a first calculation circuit (38a) for calculating an equation V11 = (V1 - DC1)/DC1 (where DC1 is a direct current component of the first electric signal) to produce an output V11 therefrom, a second calculation circuit (38b) for calculating an equation V22 = (V2 - DC2)/DC2 (where DC2 is a direct current component of the second electric signal) to produce an output V22 therefrom, and a third calculation circuit (38c) for calculating an equation V3 = 1/[( alpha /V11) - ( beta /V22)] (where alpha and beta are constants) to produce an output V3 for measurement of the applied voltage or electric field.

    OPTICAL RECORDING MEDIUM, DATA RECORDING METHOD AND DATA REPRODUCING METHOD
    4.
    发明申请
    OPTICAL RECORDING MEDIUM, DATA RECORDING METHOD AND DATA REPRODUCING METHOD 审中-公开
    光学记录介质，数据记录方法和数据再现方法

    公开(公告)号：WO1991003046A1

    公开(公告)日：1991-03-07

    申请号：PCT/JP1990001072

    申请日：1990-08-22

    Applicant: SONY CORPORATION ,  YAMAGAMI, Tamotsu ,  SAKO, Yoichiro ,  YAMAMOTO, Masanobu

    Inventor： SONY CORPORATION

    IPC: G11B07/00

    CPC classification number: G11B27/3027 ,  G11B7/00745 ,  G11B7/24082 ,  G11B11/10504 ,  G11B11/10528 ,  G11B11/10597 ,  G11B13/04 ,  G11B20/1217 ,  G11B20/1254 ,  G11B27/24 ,  G11B2020/10546 ,  G11B2020/1259 ,  G11B2220/218 ,  G11B2220/2525 ,  G11B2220/2545

    Abstract: An optical recording medium in which main data are recorded on a recording track that has been formed in advance along the track direction, and the recorded data are read out by optical means. Frame synchronizing signals based on the same format as the main data format are recorded in advance for each frame that serves as a data recording unit utilizing the displacement in the direction of width of the recording track itself, whereby the frame synchronism is easily obtained and the constitution is simplified as a result of using the synchronizing circuit in common. The data to be recorded in advance by displacing the track itself in the direction of width include frame synchronizing signal as well as any reproduction-only data, in order to increase the recording capacity of the disk. The circuit constitution is simplified by using in common the reproducing circuit for reproducing frame synchronizing signals of main data recorded in the track direction of the recording track and the reproducing circuit for reproducing frame synchronizing signals of the same format as the main data in the data recorded being displaced in the direction of track width.

    Abstract translation: 一种光学记录介质，其中主数据被记录在沿着轨道方向预先形成的记录磁道上，并且记录的数据被光学装置读出。 基于与主数据格式相同的格式的帧同步信号预先对于利用记录道本身的宽度方向上的位移的数据记录单元的每个帧进行记录，由此容易地获得帧同步，并且 作为共同使用同步电路的结果，简化了结构。 要通过沿着宽度方向移位磁道本身而预先记录的数据包括帧同步信号以及任何再现数据，以增加磁盘的记录容量。 电路结构通过共同使用用于再现记录在记录磁道的磁道方向上的主数据的帧同步信号的再现电路和用于再现与记录的数据中的主数据相同格式的帧同步信号的再现电路相同的简化 在轨道宽度方向上移位。

    DISC DEVICE
    6.
    发明申请
    DISC DEVICE 审中-公开
    DISC设备

    公开(公告)号：WO1986002768A1

    公开(公告)日：1986-05-09

    申请号：PCT/JP1985000580

    申请日：1985-10-17

    Applicant: SONY CORPORATION ,  YAMAMOTO, Masanobu

    Inventor： SONY CORPORATION

    IPC: G11B11/10

    CPC classification number: G11B19/28 ,  G11B7/0053 ,  G11B7/24082 ,  G11B11/10515 ,  G11B11/10597

    Abstract: In the disc device, the information signals are recorded on a disc or the information signals recorded on the disc are reproduced, with the rotation of the disc controlled suitably. A clock signal which modulates the intensity of the reflected light and an information signal which turns the planes of polarization of the reflected light in two different directions and does not modulate the intensity of the reflected light are recorded on the disc. The modulation of the intensity of the reflected light is detected to reproduce the clock signal, and the reflected light having planes of polarization which face in two different directions is differentially detected. The information signal is thus reproduced without being influenced by the intensity modulation. This enables the clock signal and information signal to be reproduced separately even when they are recorded in a superposed state.

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