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    Front photo detector having no gain selection switch, optical pick-up including the front photo detector, and optical recording and/or playing apparatus including the front photo detector
    51.
    发明申请
    Front photo detector having no gain selection switch, optical pick-up including the front photo detector, and optical recording and/or playing apparatus including the front photo detector 失效
    没有增益选择开关的前光检测器，包括前光检测器的光学拾取器和包括前光检测器的光记录和/或播放装置

    公开(公告)号：US20050025023A1

    公开(公告)日：2005-02-03

    申请号：US10792917

    申请日：2004-03-05

    Applicant: Hong-kyu Lee ,  Hee-dong Kim ,  Pyong-yong Seong

    Inventor： Hong-kyu Lee ,  Hee-dong Kim ,  Pyong-yong Seong

    IPC: G11B7/125 ,  G11B7/135 ,  G11B31/02 ,  H03F3/08 ,  H03F3/68 ,  H03G3/10 ,  G11B31/00

    CPC classification number: G11B31/02

    Abstract: A front photo detector (FPD) of an optical pick-up for an optical recording and playing apparatus having no gain selection switch, a simplified configuration, an improved prevention of an abnormal operation due to an error in gain selection, and improved reliability. The front photo detector includes a photo diode unit, a current-voltage amplifying circuit, and a voltage amplifying unit. The photo diode unit outputs current proportional to the power of the light emitted from one of a plurality of laser diodes. The current-voltage amplifying circuit converts the current output from the photo diode unit into a voltage. The voltage amplifying circuit amplifies the voltage output from the current-voltage amplifying circuit by a predetermined gain.

    Abstract translation: 用于没有增益选择开关的光学记录和播放装置的光学拾取器的前光检测器（FPD），简化的配置，改善了由增益选择中的错误引起的异常操作的防止以及提高的可靠性。 前光检测器包括光电二极管单元，电流 - 电压放大电路和电压放大单元。 光电二极管单元输出与从多个激光二极管中的一个发射的光的功率成比例的电流。 电流 - 电压放大电路将来自光电二极管单元的电流输出转换为电压。 电压放大电路将从电流 - 电压放大电路输出的电压放大预定的增益。

    Semiconductor laser and flying optical pickup for recording/reproducing using the same
    52.
    发明授权
    Semiconductor laser and flying optical pickup for recording/reproducing using the same 失效
    半导体激光器和飞行光学拾取器，用于使用其进行记录/再现

    公开(公告)号：US06480222B1

    公开(公告)日：2002-11-12

    申请号：US08445509

    申请日：1995-05-22

    Applicant: Chul-woo Lee ,  Jang-hoon Yoo ,  Pyong-yong Seong

    Inventor： Chul-woo Lee ,  Jang-hoon Yoo ,  Pyong-yong Seong

    IPC: B41J2700

    CPC classification number: B82Y10/00 ,  G11B7/122

    Abstract: A semiconductor laser for generating a laser beam and an optical pickup for recording/reproducing information using the semiconductor laser as an optical source are provided. The semiconductor laser includes an aperture member on an emitting end thereof to perform high-density memory recording/reproducing through the reduction of an optical spot. The aperture has a hole whose diameter is smaller than the width of the active region of the semiconductor laser, to thereby restrictively emit the laser beam via the hole so that the optical spot formed on an optical disk is reduced. Thus, high-density memory recording/reproducing, which is useful for miniaturized information processors, can be realized.

    Abstract translation: 提供了一种用于产生激光束的半导体激光器和用于使用半导体激光器作为光源来记录/再现信息的光学拾取器。 半导体激光器包括在其发射端上的孔径构件，以通过减少光点来执行高密度存储器记录/再现。 孔具有直径小于半导体激光器的有源区的宽度的孔，从而通过孔限制性地发射激光束，使得形成在光盘上的光点减小。 因此，可以实现对小型化信息处理器有用的高密度存储器记录/再现。

    Optical disk
    53.
    发明授权
    Optical disk 有权
    光盘

    公开(公告)号：US06449241B1

    公开(公告)日：2002-09-10

    申请号：US09433301

    申请日：1999-11-03

    Applicant: Pyong-yong Seong ,  Jung-wan Ko ,  In-sik Park

    Inventor： Pyong-yong Seong ,  Jung-wan Ko ,  In-sik Park

    IPC: G11B724

    CPC classification number: G11B7/24085 ,  G11B7/007 ,  G11B7/24

    Abstract: An optical disk having an improved structure is provided so that about 15 gigabytes or more can be recorded on each information recording surface. The optical disk includes at least one information substrate having an incident surface where light for recording/reproducing signals is input and a recording surface where information signals are recorded, and at least one reflection layer formed by being coated on the recording surface for reflecting at least a part of incident light. In the optical disk, assuming that the entire thickness of the optical disk is D and the distance between the incident surface and the recording surface of the information substrate is D1, the inequality 0.20≦D1/D≦0.38 is satisfied. Also, the optical disk includes a first information substrate having an incident surface where light for recording/reproducing signals is input and a first recording surface where information signals are recorded, a first reflection layer formed by being coated on the first recording surface for reflecting at least a part of incident light, and a second reflection layer formed on the second recording surface for reflecting at least a part of incident light. In the optical disk, assuming that the entire thickness of the optical disk is D and the distance between the incident surface and the first recording surface of the first information substrate is D1, the inequality 0.20≦D1/D≦0.38 is satisfied.

    Abstract translation: 提供了具有改进结构的光盘，使得每个信息记录表面上可以记录大约15吉字节或更多。 光盘包括至少一个具有入射表面的信息衬底，其中输入用于记录/再现信号的光和记录信息信号的记录表面，以及至少一个反射层，其被形成在记录表面上以至少反射 一部分入射光。 在光盘中，假设光盘的整个厚度为D，信息基板的入射表面和记录表面之间的距离为D1，则满足不等式0.20 <= D1 / D <= 0.38。 此外，光盘包括具有入射面的第一信息基板，其中输入用于记录/再现信号的光，以及记录信息信号的第一记录表面，通过涂覆在第一记录表面上形成的第一反射层，用于反射 入射光的至少一部分，以及形成在第二记录面上的第二反射层，用于反射入射光的至少一部分。 在光盘中，假设光盘的整个厚度为D，并且第一信息基板的入射表面和第一记录表面之间的距离为D1，则满足不等式0.20 <= D1 / D <= 0.38。

    Optical pickup for correcting an astigmatic difference of light
    55.
    发明授权
    Optical pickup for correcting an astigmatic difference of light 失效
    用于校正光散射差异的光学拾取器

    公开(公告)号：US5872760A

    公开(公告)日：1999-02-16

    申请号：US865141

    申请日：1997-05-29

    Applicant: Tae-kyoung Kim ,  Pyong-yong Seong ,  Chul-woo Lee

    Inventor： Tae-kyoung Kim ,  Pyong-yong Seong ,  Chul-woo Lee

    IPC: G02B27/09 ,  G11B7/125 ,  G11B7/135 ,  G11B7/00

    CPC classification number: G11B7/1376 ,  G11B7/1398

    Abstract: An optical pickup for correcting an astigmatic difference of a light by using a collimating lens arranged at an angle with respect to the thickness direction of an active layer of a light source and parallel to the width direction of the active layer, for collimating the light emitted from the light source, is provided. The collimating lens is arranged between an edge emitting laser diode having an active layer and a beam splitter, and corrects the astigmatic difference of the light emitted from the edge emitting laser diode. Therefore, a compact optical pickup can be achieved since additional optical elements for correcting the astigmatic difference of the laser beam are not required.

    Abstract translation: 一种光学拾取器，用于通过使用相对于光源的有源层的厚度方向成一定角度并平行于有源层的宽度方向布置的准直透镜来校正光的散光差异，用于准直发光的光 从光源提供。 准直透镜布置在具有有源层的边缘发射激光二极管和分束器之间，并且校正从边缘发射激光二极管发射的光的像散差。 因此，不需要用于校正激光束的像散差的附加光学元件，因此可以实现紧凑的光学拾取器。

    Optical pickup device with light spot size adjustment for different density disks
    57.
    发明授权
    Optical pickup device with light spot size adjustment for different density disks 失效
    具有不同密度盘的光斑尺寸调整的光学拾取装置

    公开(公告)号：US5701288A

    公开(公告)日：1997-12-23

    申请号：US564430

    申请日：1995-11-29

    Applicant: Pyong-yong Seong

    Inventor： Pyong-yong Seong

    IPC: G11B7/00 ,  G11B7/005 ,  G11B7/09 ,  G11B19/12

    CPC classification number: G11B7/094 ,  G11B19/12 ,  G11B7/005 ,  G11B7/0945 ,  G11B2007/0006 ,  G11B7/0908

    Abstract: An object pickup device includes a light source, an object lens for concentrating light generated from the light source onto an optical disk, a photodetector for detecting a signal from the light reflected from the optical disk, a disk detecting portion for detecting the light quantity in a light spot concentrated on the optical disk by the object lens and for detecting the optical disk type, a focus offset calculating portion for calculating a focus offset corresponding to the detected disk type, a focus servo portion for performing a focus servo mechanism according to the signal calculated from the focus offset and the signals detected in the photodetector, and a light output optimizing means for optimizing the light output of the light source according to the calculated focus offset signal. Meanwhile, a controlling method of a light output in the optical pickup device includes a disk kind detecting step, a focus offset calculating step, a focus offset adjusting step, and a compensating a focus and track error step.

    Abstract translation: 一种物体拾取装置，包括光源，用于将从光源产生的光集中到光盘上的物镜，用于检测来自光盘反射的光的信号的光电检测器，用于检测来自光盘的光量的光盘检测部分 通过物镜集中在光盘上并用于检测光盘类型的光斑;聚焦偏移计算部分，用于计算与检测到的光盘类型相对应的聚焦偏移;聚焦伺服部分，用于执行根据所述光盘类型的聚焦伺服机构; 根据所述聚焦偏移和在所述光电检测器中检测到的信号计算的信号;以及光输出优化装置，用于根据所计算的聚焦偏移信号优化所述光源的光输出。 同时，光拾取装置中的光输出的控制方法包括盘类型检测步骤，聚焦偏移计算步骤，聚焦偏移调整步骤和补偿聚焦和轨道误差步骤。

    Method for correcting aberration due to optical disk tilt and apparatus therefor
    58.
    发明授权
    Method for correcting aberration due to optical disk tilt and apparatus therefor 失效
    用于校正由于光盘倾斜引起的像差的方法及其装置

    公开(公告)号：US5699340A

    公开(公告)日：1997-12-16

    申请号：US585253

    申请日：1995-12-26

    Applicant: Chul-woo Lee ,  Kyung-hwa Rhim ,  Pyong-yong Seong ,  Chong-sam Chung

    Inventor： Chul-woo Lee ,  Kyung-hwa Rhim ,  Pyong-yong Seong ,  Chong-sam Chung

    IPC: G11B7/08 ,  G11B7/095 ,  G11B7/135

    CPC classification number: G11B7/1365 ,  G11B7/0956

    Abstract: In a method and an apparatus for correcting aberration due to optical disk tilt, the apparatus includes a correction plate through which a first light beam passes by an object lens in an optical disk, a light source and a photo detector for generating and receiving a second light beam to detect the magnitude of the optical disk tilt, respectively, and an actuator for inclining the correction plate based on the detected signal. The correction plate has the same optical properties as those of the substrate of the optical disk, irrespective of the optical pick surroundings and offset the aberration due to the optical disk tilt. Therefore, while the best performance of the optical pickup is ensured, adverse effects caused by the aberration due to the optical disk tilt can be eliminated through simple circuitry.

    Abstract translation: 在用于校正由于光盘倾斜引起的像差的方法和装置中，该装置包括：校正板，第一光束通过光盘中的物镜，光源和光电检测器，用于产生和接收第二光 光束分别检测光盘倾斜的大小，以及用于基于检测到的信号倾斜校正板的致动器。 校正板具有与光盘基板相同的光学特性，而与光拾取环境无关，并且偏移了由于光盘倾斜引起的像差。 因此，虽然确保了光学拾取器的最佳性能，但是可以通过简单的电路消除由于光盘倾斜引起的像差引起的不利影响。

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