公开(公告)号：US07035191B2

公开(公告)日：2006-04-25

申请号：US09877248

申请日：2001-06-11

申请人： Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

发明人： Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

IPC分类号： G11B7/00

CPC分类号： G11B7/127 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0006

摘要： An optical pickup compatible with recording media having different formats, the optical pickup includes a light device module having a first light beam source and a second light beam source to emit corresponding first and second light beams having different wavelengths, a hologram light coupler to separately guide the first and second light beams along the same optical path such that the first and second light beams go toward a corresponding one of the recording media, an optical path changing element to selectively alter the optical path of an incident light beam, and an objective lens disposed on an optical path between said optical path changing element the corresponding one of the recording media to focus the first and second light beam on the corresponding one of the recording media, and a photodetector to receive the first and second light beam incident from said optical path changing element.

公开(公告)号：US20060083145A1

公开(公告)日：2006-04-20

申请号：US11295594

申请日：2005-12-07

申请人： Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

发明人： Jang-hoon Yoo ,  Chul-woo Lee ,  Jong-ryull Kim

IPC分类号： G11B7/00

CPC分类号： G11B7/127 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0006

摘要： An optical pickup compatible with recording media having different formats, the optical pickup includes a light device module having a first light beam source and a second light beam source to emit corresponding first and second light beams having different wavelengths, a hologram light coupler to separately guide the first and second light beams along the same optical path such that the first and second light beams go toward a corresponding one of the recording media, an optical path changing element to selectively alter the optical path of an incident light beam, and an objective lens disposed on an optical path between said optical path changing element the corresponding one of the recording media to focus the first and second light beam on the corresponding one of the recording media, and a photodetector to receive the first and second light beam incident from said optical path changing element.

公开(公告)号：US06882614B2

公开(公告)日：2005-04-19

申请号：US09789522

申请日：2001-02-22

申请人： Chul-woo Lee ,  Jang-hoon Yoo

发明人： Chul-woo Lee ,  Jang-hoon Yoo

IPC分类号： G11B7/00 ,  G11B7/135 ,  G11B7/09

CPC分类号： G11B7/1374 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A recording/reproducing apparatus having an optical pickup device which is efficient in light use having little spherical aberration. The recording and/or reproducing apparatus includes an optical pickup having an objective lens, disposed opposite a disk, having a light passing region divided into central, intermediate and periphery regions corresponding to a near axis area, an intermediate axis area and a far axis area of incident light, where the curvature of the central and peripheral regions is optimized for a thin disk and that of the intermediate region is optimized for a thick disk, a light source irradiating light toward a disk through the objective lens; a photo detector for detecting light reflected from the disk, and a beam splitter, disposed between the objective lens and the light source, for transmitting light from the light source toward the objective lens and for diffracting light reflected from the disks toward the photo detector; and a processing unit to process an information signal to control the incident light generated by the light source, and to process the detected light from the photodetector. Therefore, the optical pickup device can be used for both compact disks (CDs) that are thick using light beam passing the near and intermediate regions of said objective lens, and digital video disks (DVDs) that are thin using light beam passing the near and far axis regions of said objective lens, and detect signals without picking up noise regardless of the thickness of the disk.

摘要翻译： 一种具有光学拾取装置的记录/再现装置，其具有很少的球面像差的光利用效率。 记录和/或再现装置包括具有与光盘相对设置的物镜的光学拾取器，具有被分成对应于近轴区域的中心，中间和周边区域的光通过区域，中间轴区域和远轴区域 入射光的中心区域和外围区域的曲率优化为薄盘，中间区域的曲率针对厚盘优化，光源通过物镜向盘照射光; 用于检测从光盘反射的光的光检测器和设置在物镜和光源之间的光束分离器，用于将光从光源向物镜透射，并将从光盘反射的光衍射到光检测器; 以及处理单元，处理信息信号以控制由光源产生的入射光，并处理来自光电检测器的检测光。 因此，光拾取装置可以用于使用通过所述物镜的近中和中间区域的光束而使用厚度的光盘（CD），以及使用经过近距离的光束的薄的数字视频盘（DVD） 所述物镜的远轴区域，无论盘的厚度如何，都可以检测信号而不拾取噪声。

公开(公告)号：US06480222B1

公开(公告)日：2002-11-12

申请号：US08445509

申请日：1995-05-22

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

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

IPC分类号： B41J2700

CPC分类号： B82Y10/00 ,  G11B7/122

摘要： 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.

摘要翻译： 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。

公开(公告)号：US06212154B1

公开(公告)日：2001-04-03

申请号：US09095126

申请日：1998-06-10

申请人： Jang-hoon Yoo ,  Chul-woo Lee

发明人： Jang-hoon Yoo ,  Chul-woo Lee

IPC分类号： G11B700

CPC分类号： G11B7/1381 ,  G11B7/13922 ,  G11B2007/13727

摘要： An optical pickup using a light-emitting diode (LED), which is capable of forming a light spot of an appropriate size for high-density recording/reproduction. The optical pickup includes a light-emitting diode (LED) to generate and emit light; a condensing unit to condense the light emitted from the LED; an optical filter to selectively transmit a predetermined wavelength of the light emitted from the LED; a spatial filter having a pin-hole, to limit a transmission range of the light condensed by the condensing unit; and a collimating lens to condense the divergent light passed through the spatial filter to form a parallel light. The parallel light is directed by a beam splitter toward an objective lens which focuses the parallel light on an optical disk. The light reflected from the optical disk is received by a photodetector.

摘要翻译： 一种使用发光二极管（LED）的光学拾取器，其能够形成用于高密度记录/再现的适当尺寸的光点。 光拾取器包括用于产生和发光的发光二极管（LED）; 冷凝单元，用于冷凝从LED发出的光; 光学滤波器，用于选择性地发射从LED发射的光的预定波长; 具有针孔的空间滤波器，以限制由所述冷凝单元聚光的光的透射范围; 以及准直透镜，用于冷凝通过空间滤光器的发散光以形成平行光。 平行光由分束器引向物镜，将平行光聚焦在光盘上。 从光盘反射的光被光检测器接收。

公开(公告)号：US6147955A

公开(公告)日：2000-11-14

申请号：US291031

申请日：1999-04-14

申请人： Chul-woo Lee ,  Jang-hoon Yoo

发明人： Chul-woo Lee ,  Jang-hoon Yoo

IPC分类号： G02B7/00 ,  G02B3/08 ,  G02B3/10 ,  G02B13/00 ,  G02B13/18 ,  G11B7/00 ,  G11B7/08 ,  G11B7/135

CPC分类号： G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An optical pickup device which is efficient in light use having little spherical aberration. The optical pickup device of an optical pickup includes an objective lens, disposed opposite a disk, having a light passing region divided into central, intermediate and periphery regions corresponding to a near axis area, an intermediate axis area and a far axis area of incident light, where the curvature of the central and peripheral regions is optimized for a thin disk and that of the intermediate region is optimized for a thick disk; a light source irradiating light toward a disk through the objective lens; a photo detector for detecting light reflected from the disk; and a beam splitter, disposed between the objective lens and the light source, for transmitting light from the light source toward the objective lens and for diffracting light reflected from the disks toward the photo detector. Therefore, the optical pickup device can be used for both compact disks (CDs) that are thick using light beam passing the near and intermediate regions of said objective lens, and digital video disks (DVDS) that are thin using light beam passing the near and far axis regions of said objective lens, and detect signals without picking up noise regardless of the thickness of the disk.

摘要翻译： 一种光学拾取装置，其具有很小的球面像差。 光学拾取器的光学拾取装置包括物镜，该物镜与盘相对设置，具有被分成对应于近轴区域的中心，中间和周边区域的光通过区域，入射光的中轴线区域和远轴区域 其中中央和外围区域的曲率针对薄盘进行了优化，中间区域的曲率针对厚盘进行了优化; 通过物镜向光盘照射光的光源; 用于检测从盘反射的光的光电检测器; 以及设置在物镜和光源之间的分束器，用于将光从光源向物镜透射，并将从光盘反射的光衍射到光检测器。 因此，光拾取装置可以用于使用通过所述物镜的近中和中间区域的光束而使用厚度的光盘（CD），以及使用光束通过近端和/或远端的光束的数字视频盘（DVDS） 所述物镜的远轴区域，无论盘的厚度如何，都可以检测信号而不拾取噪声。

公开(公告)号：US6016293A

公开(公告)日：2000-01-18

申请号：US797697

申请日：1997-02-11

申请人： Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo

发明人： Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo

IPC分类号： G11B7/004 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B19/12

CPC分类号： G11B19/12 ,  G11B7/0037 ,  G11B7/131 ,  G11B2007/0006 ,  G11B2007/13727 ,  G11B7/0908

摘要： A disc discriminating method and an objective lens adopting the same, in which fast disc type discrimination and stable reproduction signal generation is performed. The method includes the steps of increasing and decreasing a focus voltage applied to an actuator of an objective lens facing a disc having an information-recorded plane to move the objective lens in a standby state at a neutral position to a focus position corresponding to the disc, detecting a movement distance value of the objectiveness from a focus signal applied to the actuator when the objective lens moves to the focus position, comparing the movement distance value with a reference value and determining the disc to be a thick disc if the movement distance value is greater than the reference value, and determining the disc to be a thin disc if the movement distance value is less than the reference value.

摘要翻译： 一种光盘鉴别方法及采用该光盘鉴别方法的物镜，其中执行快盘类型识别和稳定再现信号产生。 该方法包括以下步骤：增加和减少施加到面向具有信息记录平面的盘的物镜的致动器的聚焦电压，以将处于中性位置的待机状态的物镜移动到对应于光盘的对焦位置 当物镜移动到对焦位置时，从施加到致动器的聚焦信号检测出物体的移动距离值，将移动距离值与参考值进行比较，并且如果移动距离值 大于参考值，并且如果移动距离值小于参考值，则将盘确定为薄盘。

公开(公告)号：US5699339A

公开(公告)日：1997-12-16

申请号：US508253

申请日：1995-07-27

申请人： Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Kyung-hwa Rim

发明人： Chul-woo Lee ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Kyung-hwa Rim

IPC分类号： G11B7/08 ,  G11B7/09 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/0908 ,  G11B7/0917 ,  G11B7/094 ,  G11B2007/0919

摘要： In detecting a focus error for an optical pickup, an inverse image generator for generating inverse images onto a light beam reflected from an optical disk is used in a focus error detecting method and apparatus thereof. The inverse image generator is composed of a semi-transmissive plane for splitting a light beam into first and second light beams, first and second prisms for inverting the phase of the second light beam, and third and fourth prisms for synthesizing the phase-inverted second light beam with the first light beam. Also, the inverse image generator has two quadrant wave plates, a polarization plane and light synthesizing plane for preventing a light loss. Since the errors due to an optical axis variation is eliminated from the focus error signal detected from the synthetic light beam radiated by the inverse generator, the optical pickup can be driven with stability.

摘要翻译： 在检测光拾取器的聚焦误差时，在聚焦误差检测方法及其装置中使用用于在从光盘反射的光束上产生反转图像的逆图像发生器。 逆图像生成器由用于将光束分割为第一和第二光束的半透射平面，用于反转第二光束的相位的第一和第二棱镜以及用于合成相位反转的第二棱镜的第三和第四棱镜 光束与第一光束。 此外，逆图像生成器具有两个象限波片，一个用于防止光损失的偏振面和光合成平面。 由于从由逆发生器辐射的合成光束检测到的聚焦误差信号中消除了由于光轴变化引起的误差，所以可以稳定地驱动光学拾取器。

公开(公告)号：US06590853B1

公开(公告)日：2003-07-08

申请号：US09281230

申请日：1999-03-30

申请人： Yong-hoon Lee ,  Chul-woo Lee ,  Chong-sam Chung ,  Kun-ho Cho

发明人： Yong-hoon Lee ,  Chul-woo Lee ,  Chong-sam Chung ,  Kun-ho Cho

IPC分类号： G11B7085

CPC分类号： G11B7/122 ,  G11B7/08576 ,  G11B7/08594 ,  G11B7/14 ,  G11B7/24038

摘要： A swing arm driving type optical recording/reproducing apparatus includes a base, at least one optical disk rotatably installed on the base, both sides of which are information recording surfaces and a plurality of optical pickups which are equal in number to the information recording surfaces so as to form light spots on the respective information recording surfaces of the optical disk. Each optical pickup includes a light source for irradiating light. The apparatus also includes optical path changing units respectively arranged on optical paths between the light sources and respective ones of the information recording surfaces for changing the traveling paths of the lights and objective lenses arranged between the optical path changing units and the respective information recording surfaces for condensing incident light on the respective information recording surfaces. Photodetectors receive the lights reflected from the respective information recording surfaces and incident via the respective objective lenses and the optical path changing units. A swing member includes a mount on which the light sources, the optical path changing units and the photodetectors are installed. A plurality of swing arms extend from the mount. A suspension has one end which is installed on a surface of each swing arm and is adjacent to the respective information recording surface for elastically biasing the other end. A slider is installed at the other end of the suspension, which contacts the respective information recording surface by the elastic bias of the suspension and into which the respective objective lens is loaded. A supporting unit is interposed between the base and the mount for supporting the swing member to be reciprocally rotatable centering around one hinge point on the base and a magnetic driver for reciprocally rotating the swing member.

摘要翻译： 摇臂驱动型光学记录/再现装置包括基座，至少一个可旋转地安装在基座上的光盘，其两侧是信息记录表面和与信息记录表面相等的多个光学拾取器 以便在光盘的相应信息记录表面上形成光斑。 每个光学拾取器包括用于照射光的光源。 该装置还包括光路改变单元，其分别设置在光源和信息记录表面之间的光路上，用于改变布置在光路改变单元和各个信息记录表面之间的光和物镜的行进路径， 将入射光聚光在相应的信息记录表面上。 光检测器接收从相应的信息记录表面反射并经由各个物镜和光路改变单元入射的光。 摆动构件包括其上安装有光源，光路改变单元和光电检测器的安装件。 多个摆臂从支座延伸。 悬架的一端安装在每个摆臂的表面上，并且与相应的信息记录表面相邻以弹性地偏压另一端。 滑块安装在悬架的另一端，其通过悬架的弹性偏置与相应的信息记录表面接触，并且相应的物镜被加载到该悬架中。 支撑单元插入在基座和支架之间，用于支撑摆动构件以使基座上的一个铰链点为中心往复旋转，以及用于使摆动构件往复旋转的磁性驱动器。

公开(公告)号：US06359850B1

公开(公告)日：2002-03-19

申请号：US09179406

申请日：1998-10-27

申请人： Chong-sam Chung ,  Chul-woo Lee ,  Kun-ho Cho ,  Yong-Hoon Lee

发明人： Chong-sam Chung ,  Chul-woo Lee ,  Kun-ho Cho ,  Yong-Hoon Lee

IPC分类号： G11B700

CPC分类号： B82Y10/00 ,  G11B7/123 ,  G11B7/1374 ,  G11B2007/13725

摘要： An optical pickup in which a light receptor and a light transmitter are integrated with a catadioptric objective lens. The optical pickup includes a unit for emitting laser light to a recording medium and detecting the light reflected from the recording medium. The catadioptric objective lens includes a first reflective area for reflecting the light incident from the unit, a focusing area for focusing the light incident from the unit as a focused spot, and a second reflective area for reflecting the light reflected from the first reflective area toward the focusing area. The first reflective area and the focusing area form a first surface of the catadioptric objective lens while the second reflective area is a part of a second surface of the catadioptric objective lens located in the vicinity of the unit. The light from the unit is incident to the catadioptric objective lens via portions of the second surface other than the second reflective area The optical pickup uses compact and light-weight components creating a thinner optical pickup suitable for use in slim devices such as notebook computers.

摘要翻译： 其中光接收器和光发射器与反射折射物镜集成的光学拾取器。 光拾取器包括用于向记录介质发射激光并检测从记录介质反射的光的单元。 反射折射物镜包括用于反射从单元入射的光的第一反射区域，用于聚焦从单元入射的光作为聚焦点的聚焦区域和用于将从第一反射区域反射的光反射到第二反射区域的第二反射区域 聚焦区域。 第一反射区域和聚焦区域形成反射折射物镜的第一表面，而第二反射区域是位于该单元附近的反射折射物镜的第二表面的一部分。 来自该单元的光通过除了第二反射区域之外的第二表面的部分而入射到反射折射物镜。光学拾取器使用紧凑且重量轻的部件，产生适用于诸如笔记本计算机的细长装置的较薄的光学拾取器。