公开(公告)号：US07116627B2

公开(公告)日：2006-10-03

申请号：US09899501

申请日：2001-07-06

Applicant: Jang-hoon Yoo ,  Seung-tae Jung ,  Ho-cheol Lee ,  Ju-hyung Lee ,  Chul-woo Lee ,  Young-il Kim ,  Hyun-seob Choi ,  Sang-beom Hong

Inventor： Jang-hoon Yoo ,  Seung-tae Jung ,  Ho-cheol Lee ,  Ju-hyung Lee ,  Chul-woo Lee ,  Young-il Kim ,  Hyun-seob Choi ,  Sang-beom Hong

IPC: G11B7/00

CPC classification number: G11B7/1374 ,  G11B7/1367 ,  G11B7/13922 ,  G11B2007/0006

Abstract: A compatible optical pickup device includes a single light source to emit a light having a wavelength longer than 650 nm, an objective lens having a near axis area, a ring type annular lens area, and a far axis area to focus the light to form light spots suitable for a first relatively thin optical disk and a second relatively thick optical disk to form a first light spot having an FWHM (full width at half maximum) of 0.72 μm or less for the first optical disk and a second light spot having an FWHM of 0.8 μm or more for the second optical disk, an optical path changer to change a proceeding path of incident light, and a photodetector to receive light reflected by the optical disk and having passed through the objective lens and the optical path changer and to detect an information signal and/or an error signal.

Abstract translation: 兼容的光学拾取装置包括发射波长长于650nm的光的单个光源，具有近轴区域的物镜，环形环形透镜区域和远轴区域，以聚焦光以形成光 适用于第一相对较薄的光盘和第二相对厚的光盘的光点，以形成第一光盘具有FWHM（半高全宽）为0.72μm或更小的第一光点，以及具有FWHM的第二光点 对于第二光盘为0.8μm以上的光路改变器，改变入射光的行进路径的光路改变器，以及光接收器，用于接收由光盘反射并经过物镜和光路变换器的光，并检测 信息信号和/或误差信号。

公开(公告)号：US07035191B2

公开(公告)日：2006-04-25

申请号：US09877248

申请日：2001-06-11

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

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

IPC: G11B7/00

CPC classification number: G11B7/127 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0006

Abstract: 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

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

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

IPC: G11B7/00

CPC classification number: G11B7/127 ,  G11B7/123 ,  G11B7/1353 ,  G11B7/1372 ,  G11B2007/0006

Abstract: 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：USRE39025E1

公开(公告)日：2006-03-21

申请号：US09689757

申请日：2000-10-13

Applicant: Chul-woo Lee ,  Dong-ho Shin ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Yong-hoon Lee

Inventor： Chul-woo Lee ,  Dong-ho Shin ,  Kyung-hwa Rim ,  Chong-sam Chung ,  Kun-ho Cho ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Yong-hoon Lee

IPC: G02B9/00

CPC classification number: G11B7/1353 ,  G02B3/10 ,  G02B27/58 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A lens device which can be used as an objective lens in an optical pickup apparatus includes an objective lens provided along a light path facing a disc and having a predetermined effective diameter, and light controlling means provided along the light path for controlling the light in an intermediate region between near and far axes of an incident light beam, thus providing a simplified and inexpensive device for using discs of differing thickness in a single disc drive, by reducing the spherical aberration effect.

Abstract translation: 可以在光学拾取装置中用作物镜的透镜装置包括沿着光盘面向盘并具有预定有效直径的物镜，沿着光路设置的光控制装置，用于控制光 入射光束的近轴和远轴之间的中间区域，从而通过减小球面像差效应来提供在单个盘驱动器中使用不同厚度的盘的简化且便宜的装置。

公开(公告)号：US06882614B2

公开(公告)日：2005-04-19

申请号：US09789522

申请日：2001-02-22

Applicant: Chul-woo Lee ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Jang-hoon Yoo

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

CPC classification number: G11B7/1374 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: 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.

Abstract translation: 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：US06547398B2

公开(公告)日：2003-04-15

申请号：US09860820

申请日：2001-05-21

Applicant: Kun-ho Cho ,  Seung-tae Jung ,  Jang-hoon Yoo ,  Chul-woo Lee

Inventor： Kun-ho Cho ,  Seung-tae Jung ,  Jang-hoon Yoo ,  Chul-woo Lee

IPC: G03B2100

CPC classification number: G03B21/005 ,  H04N9/3117 ,  H04N13/305 ,  H04N13/324 ,  H04N13/337 ,  H04N13/363

Abstract: A projection-type image display apparatus having a structure adapted so that the efficiency of the use of light and resolving power thereof can be enhanced. The projection-type image display apparatus includes a light source; a color separation unit separating incident rays according to predetermined wavelengths, and directing the separated rays at different angles; a lens array dividing the rays separated by the color separation unit into predetermined pixels; a driving portion driving the lens array to change the proceeding paths of the color rays; a polarizing beam splitter changing a proceeding path of incident rays depending on a direction of polarization; a reflection-type display device producing a color image using the rays entering via the polarizing beam splitter, and reflecting the color image toward the polarizing beam splitter; and a projection lens unit magnifying and projecting an incident image onto a screen. In addition, the projection-type image display apparatus may comprise. Alternative designs include a transmission-type display device in place of the reflection-type display device and a deflector changing the proceeding paths of the individual color rays separated by the color separation unit instead of the driving portion.

Abstract translation: 一种投影型图像显示装置，其具有能够提高光的使用效率和分辨能力的结构。 投影型图像显示装置包括光源; 分离单元，根据预定波长分离入射光线，并以不同的角度引导分离的光线; 透镜阵列，将由分色单元分离的光线划分成预定的像素; 驱动所述透镜阵列以改变所述彩色光线的前进路径的驱动部; 偏振分束器根据偏振方向改变入射光线的行进路径; 反射型显示装置，使用通过偏振分束器进入的光线产生彩色图像，并将彩色图像反射向偏振分束器; 以及将投影图像放大并投影到屏幕上的投影透镜单元。 此外，投影型图像显示装置可以包括。 替代设计包括代替反射型显示装置的透射型显示装置和改变由分色单元分离的各个色光的行进路径而不是驱动部分的偏转器。

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。

公开(公告)号：US06430139B1

公开(公告)日：2002-08-06

申请号：US09671710

申请日：2000-09-28

Applicant: Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Chong-sam Chung ,  Dong-ho Shin

Inventor： Jang-hoon Yoo ,  Kun-ho Cho ,  Seung-tae Jung ,  Chul-woo Lee ,  Chong-sam Chung ,  Dong-ho Shin

IPC: G11B712

CPC classification number: G11B7/13922 ,  G11B7/1374 ,  G11B2007/0006

Abstract: A high-density focusing objective lens having a high numerical aperture (NA), which can be easily manufactured by an existing technique, and an optical pickup using the objective lens for high-density recording. The objective lens includes a first transmitting portion placed at a relatively near-axis region from the optical axis to divergently transmit an incident light beam; a first reflecting portion to divergently reflect the incident light beam, the first reflecting portion faces the first transmitting portion; a second reflecting portion, formed at a relatively far-axis region around the first transmitting portion that focuses and reflects the light reflected from the first reflecting portion; and a second transmitting portion, formed at a relatively far-axis region around the first reflecting portion, that refracts and transmits the light beam focused by the second reflecting portion as a peripheral light beam, wherein the maximum angle &agr; between the optical axis and the peripheral light beam satisfies the condition of 30° ≦&agr;≦65°. The optical pickup further includes the previously mentioned objective lens as a second objective lens, which is optionally placed into the optical path between a first objective lens and an optical medium. As a result, the NA of the objective lens unit can be increased up to 0.85 while the working distance d2 is maintained to be 0.2 mm.

Abstract translation: 具有可以容易地通过现有技术制造的具有高数值孔径（NA）的高密度聚焦物镜和使用该物镜进行高密度记录的光学拾取器。 物镜包括放置在与光轴相对靠近轴的区域的第一透射部分，以发散入射光束; 第一反射部分，其分散地反射入射光束，第一反射部分面向第一透射部分; 第二反射部，形成在第一透射部周围的相对远轴的区域，聚焦并反射从第一反射部反射的光; 以及第二透射部，形成在所述第一反射部周围的相对远轴的区域，所述第二透射部折射并透射由所述第二反射部聚焦的光束作为周边光束，其中，所述光轴与所述第二反射部之间的最大角度α 周边光束满足30°<=α<= 65°的条件。 光拾取器还包括作为第二物镜的前述物镜，其可选地放置在第一物镜和光介质之间的光路中。 结果，物镜单元的NA可以增加到0.85，而工作距离d2保持为0.2mm。

公开(公告)号：US06212154B1

公开(公告)日：2001-04-03

申请号：US09095126

申请日：1998-06-10

Applicant: Jang-hoon Yoo ,  Chul-woo Lee

Inventor： Jang-hoon Yoo ,  Chul-woo Lee

IPC: G11B700

CPC classification number: G11B7/1381 ,  G11B7/13922 ,  G11B2007/13727

Abstract: 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.

Abstract translation: 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

Applicant: Chul-woo Lee ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Jang-hoon Yoo

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

CPC classification number: G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: 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.

Abstract translation: 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。