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    OPTICAL PICKUP AND OPTICAL DISK DEVICE
    2.
    发明专利
    OPTICAL PICKUP AND OPTICAL DISK DEVICE 失效

    公开(公告)号：JP2001143299A

    公开(公告)日：2001-05-25

    申请号：JP32344199

    申请日：1999-11-12

    Applicant: SONY CORP

    Inventor： MATSUO NORIMASA

    IPC: G11B7/005 ,  G11B7/125

    Abstract: PROBLEM TO BE SOLVED: To reduce the total size and thickness of an optical disk device and to improve the reliability of the disk device for reproducing the information. SOLUTION: This device includes a self-oscillation type laser diode 11 which emits a laser beam, an objective lens 12 which condenses the laser beam emitted from the diode 11 on a recording surface 17 of a magneto-optical disk 2 and a signal processing circuit 7 which detects the jitter value of signals reproduced from the disk 2. When the return light of the laser beam emitted from the diode 11 produces the noises due to the change of its operating environment and then the jitter value detected by the circuit 7 is increased, the output of the laser light emitted from the diode 11 is increased compared with the standard set value according to the jitter value in order to suppress the noises.

    GLASS DELAY CIRCUIT
    3.
    发明专利
    GLASS DELAY CIRCUIT 失效

    公开(公告)号：JPH03276913A

    公开(公告)日：1991-12-09

    申请号：JP7539990

    申请日：1990-03-27

    Applicant: SONY CORP

    Inventor： ISHIKAWA KAZUO ,  TOMONO HARUO ,  NATSUME ETSUTAKA ,  BANDAI KOHEI ,  MATSUO NORIMASA ,  HIGUCHI TAKAKO ,  OSAWA SABURO ,  MIYAUCHI KAZUO ,  OKUBO KENICHI ,  HANAOKA YASUO

    IPC: H03H9/30

    Abstract: PURPOSE:To realize an optimum delay characteristic without being affected with external noise by constituting a matching circuit comprising a glass delay element of a resistor, a capacitor and an active transistor(TR), and varying an emitter resistance with an external signal. CONSTITUTION:An impedance when viewing from the output of an input control circuit is supplied as a function of R1, R2, C11, where R1, R2 are resistance between emitters of differential pair transistors(TRs) Q1, Q2, and Q3, Q4. On the other hand, an equivalent circuit not employing an inductance is realized from an output side control circuit by adjusting resistance R'1 between emitters of differential pair TRs Q6, Q7 and resistance R'2 between emitters of differential pair TRs Q8, Q9 so as to satisfy the relation of L0/R0=C12R'1 and R0=R'2 through the control of a current source TR supplying an emitter current, and the matching condition of the glass delay element is satisfied by varying emitter resistors R1, R2 (R'1, R'2) with a signal applied externally.

    OPTICAL PICKUP DEVICE AND DISK PLAYER DEVICE
    5.
    发明专利
    OPTICAL PICKUP DEVICE AND DISK PLAYER DEVICE 失效

    公开(公告)号：JPH1069667A

    公开(公告)日：1998-03-10

    申请号：JP22540296

    申请日：1996-08-27

    Applicant: SONY CORP

    Inventor： NISHI NORIAKI ,  MATSUO NORIMASA

    IPC: G11B7/135

    Abstract: PROBLEM TO BE SOLVED: To easily and exactly control the quantity of a light beam by making a distance between apertures, in one direction orthogonal to the optical axis of the light beam, mutually conjugate with a first and a second apertures through a light beam branching means. SOLUTION: In this optical pickup device, an aperture A1 prescribing the diameter of a light beam made incident on an objective lens 11 shown by an arrow A1 in the figure is mutually and substantially conjugate with a second aperture A2 prescribing the diameter of a light beam made incident on the light receiving surface of a light output detector 6 shown by an arrow A2 in the figure through a slope part 27. Consequently, by controlling a light emitting output in a semiconductor laser chip 1 based on the detected light output outputted from the light output detector 6, the quantity of a light beam projected on the signal recording surface of an optical disk 101 is easily and exactly controlled.

    OPTICAL DISK APPARATUS
    6.
    发明专利
    OPTICAL DISK APPARATUS 失效

    公开(公告)号：JPH08235605A

    公开(公告)日：1996-09-13

    申请号：JP6201995

    申请日：1995-02-24

    Applicant: SONY CORP

    Inventor： MATSUO NORIMASA ,  MIZUNO TOSHIYUKI

    IPC: G11B7/09 ,  G11B7/13

    Abstract: PURPOSE: To obtain an optical disk apparatus by which a focus error can be detected precisely by means of an optical system of a simple constitution. CONSTITUTION: Outputs of respective photodetectors C6, C7, C8, C9 which are arranged and installed on a light-receiving face become identical when an information recording face on an optical disk is situated in an anastigmatic average image point position, and they differ in the respective photodetectors which are formed as prescribed sets when the information recording face on the optical disk is deviated to a deviation direction from the anastigmatic average image point position. A focus error signal is generated on the basis of the outputs of the respective photodetectors C6, C7, C8, C9, and the focus position of the information recording face on the optical disk is controlled in such a way that the outputs of the respective photodetectors become identical. Thereby, a focus can be detected without installing a new optical system for focus-error detection. Then, it is possible to realize an optical disk apparatus by which a focus error can be detected with good accuracy by an optical system of a simple constitution.

    CHROMA TRAP VARIABLE TYPE Y/C SEPARATOR
    7.
    发明专利
    CHROMA TRAP VARIABLE TYPE Y/C SEPARATOR 失效

    公开(公告)号：JPH03241992A

    公开(公告)日：1991-10-29

    申请号：JP3718090

    申请日：1990-02-20

    Applicant: SONY CORP

    Inventor： ISHIKAWA KAZUO ,  MATSUO NORIMASA ,  YOSHIKAWA HIROSHI ,  HIGUCHI TAKAKO

    IPC: H04N9/78

    Abstract: PURPOSE:To provide selectivity to a video picture by varying a quantity of subtracting a chroma signal component superimposed onto a luminance signal with an external coefficient signal when the luminance signal is separated from a composite color video signal. CONSTITUTION:A coefficient arithmetic circuit 4 obtains an envelope level Cd of a chroma signal by using a diode D so as to detect the chroma signal. The conversion level B.Cd is set to 1.0 when a color bar max is 1.0 and an envelope level Cd is converted with the conversion characteristic having an offset level and a saturation characteristic and the value B.Cd is calculated and the result is multiplied by K (K=0-1) with a coefficient signal inputted from an external TK. As a result, a coefficient of (K.B.Cd) is inputted to a multiplier 5 from the coefficient arithmetic circuit 4 and converted into a multiple of CX(K.B.Cd) when the level of the chroma signal component is C and the result is fed to a subtraction circuit 6. Thus, the coefficient signal is adjusted and independency is provided to a separated luminance signal.

    Optical pickup and optical disk device
    8.
    发明专利
    Optical pickup and optical disk device 审中-公开
    光学拾取和光盘设备

    公开(公告)号：JP2009259347A

    公开(公告)日：2009-11-05

    申请号：JP2008108229

    申请日：2008-04-17

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： ISHII TAMOTSU ,  MATSUO NORIMASA ,  MATSUO YASUYUKI

    IPC: G11B7/135

    Abstract: PROBLEM TO BE SOLVED: To provide an optical pickup wherein a stable recording state is continued by a simple constitution reduced in size and weight. SOLUTION: The optical pickup is provided with: a laser diode 42A which outputs an optical beam; a collimator lens 44 which is provided on the optical path of the optical beam outputted from the laser diode 42A and converts the optical beam to parallel light; and a predetermined-thickness DBSP 45 which comprises a wave length selection film 45A and a reflection prevention film 45B provided in parallel to the wave length selection film 45A, spectrally separates the parallel light by the wave length selection film 45A, irradiates an optical disk 100 with the parallel light by a predetermined rate, and guides the residual parallel light to an FPD 46 for power control. By moving the position of the collimator lens 44 on the optical path, the parallel light is guided to the DBSP 45 while converted to a micro-diverging light or micro-convergent light. COPYRIGHT: (C)2010,JPO&INPIT

    Abstract translation: 要解决的问题：提供一种光学拾取器，其中通过简单的结构减小尺寸和重量来继续稳定的记录状态。 光拾取器设置有：输出光束的激光二极管42A; 准直透镜44，设置在从激光二极管42A输出的光束的光路上，并将光束转换为平行光; 并且包括与波长选择膜45A平行设置的波长选择膜45A和防反射膜45B的预定厚度的DBSP 45，通过波长选择膜45A对平行光进行光谱分离，照射光盘100 平行光以预定的速率被引导，并且将剩余的平行光引导到用于功率控制的FPD 46。 通过将准直透镜44的位置移动到光路上，平行光被引导到DBSP 45，同时转换成微发散光或微会聚光。 版权所有（C）2010，JPO＆INPIT

    RECORDING/REPRODUCING DEVICE
    9.
    发明专利
    RECORDING/REPRODUCING DEVICE 失效

    公开(公告)号：JPH10261229A

    公开(公告)日：1998-09-29

    申请号：JP6362797

    申请日：1997-03-17

    Applicant: SONY CORP

    Inventor： MATSUO NORIMASA ,  SAITO TAKEHIKO

    IPC: G11B7/00 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/09 ,  G11B7/13

    Abstract: PROBLEM TO BE SOLVED: To prevent the interruption of a focus servo operation or a tracking servo operation by preventing the operation of servo sampling in a shortest space zone during an unstable photodetection output immediately after switching from a reproducing mode to a recording mode. SOLUTION: The generation of a sampling pulse is performed based on an EFM signal corresponding to a signal recorded by an optical recording medium. A sampling signal is generated in such a manner that when the EFM signal is inputted to a sampling pulse generation circuit, the sampling pulse is set to an H level after the passage of a first delay time Dt1 from its falling and it is set to an L level when a time until the rising of a next EFM signal reaches a second delay time Dt2. The first and second delay times are lengthened to be properly set by replace third and fourth delay times Dt1' and Dt2', and thereby a shortest zone length is set among space zones where the sampling signal is set to the H level.

    OPTICAL PICKUP DEVICE
    10.
    发明专利
    OPTICAL PICKUP DEVICE 失效

    公开(公告)号：JPH1049910A

    公开(公告)日：1998-02-20

    申请号：JP20217996

    申请日：1996-07-31

    Applicant: SONY CORP

    Inventor： MATSUO NORIMASA

    IPC: G11B7/13 ,  G11B7/135

    Abstract: PROBLEM TO BE SOLVED: To read an information signal from an optical recording medium with excellent sensitivity by selectively setting a gain of a current/voltage amplifier for a signal reading photodetector according to an output of an optical output detector with a control circuit. SOLUTION: Luminous flux outgoing from a semiconductor laser chip 1 is made incident on a slope 8 of a prism 7. The slope 8 reflects the majority of the incident luminous flux, and deflects them in the direction perpendicular to a surface part of a semiconductor substrate 3 to converge them on a signal recording layer 102, or 104 of an optical disk 101, or a magneto-optical disk 103 through an objective lens 11. Further, the slope 8 makes transmit the remainder of the luminous flux incident from the laser chip 1 through to lead them to the light receiving part of the optical output detector 6F. The detector 6F monitors the light emission output of the laser chip 1 to control it.

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