公开(公告)号：US20050169154A1

公开(公告)日：2005-08-04

申请号：US11091449

申请日：2005-03-29

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

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

IPC: G02B13/00 ,  G02B3/08 ,  G02B13/18 ,  G11B7/085 ,  G11B7/09 ,  G11B7/095 ,  G11B7/135 ,  G11B7/24 ,  G11B7/00

CPC classification number: G11B7/13927 ,  G11B7/1362 ,  G11B7/1374 ,  G11B7/1378 ,  G11B2007/13725

Abstract: An optical pickup includes a light source emitting a laser beam and an optical path changing unit altering a traveling path of an incident beam. An objective lens, disposed on an optical path between the optical path changing unit and an optical disk, focuses the incident beam from the light source to form a light spot on the optical disk of the objective lens. The optical pickup further includes a photodetector and an detecting-correcting unit, arranged on the optical path between the optical path changing unit and the objective lens, performing at least one of detecting the thickness of the optical disk and correcting aberration caused by thickness variations of the optical disk. The objective lens includes a first transmitting portion divergently transmitting an incident beam, where the first transmitting portion is at a relatively near-axis region from an optical axis of the objective lens. A second transmitting portion transmits the incident beam, where the second transmitting portion is arranged facing the first transmitting portion. A first reflecting portion condenses and reflects the incident beam from the first transmitting portion, where the first reflecting portion is formed around the second transmitting portion. A second reflecting portion condenses and reflects the incident beam from the first reflecting portion towards the second transmitting portion, where the second reflecting portion is formed around the first transmitting portion.

Abstract translation: 光拾取器包括发射激光束的光源和改变入射光束的行进路径的光路改变单元。 设置在光路改变单元和光盘之间的光路上的物镜聚焦来自光源的入射光束，以在物镜的光盘上形成光斑。 光学拾取器还包括光电检测器和检测校正单元，其布置在光路改变单元和物镜之间的光路上，执行检测光盘的厚度和校正由厚度变化引起的像差中的至少一个 光盘。 物镜包括发射入射光束的第一透射部分，其中第一透射部分处于距离物镜的光轴的相对近轴的区域。 第二发送部分透射入射光束，其中第二透射部分布置成面对第一透射部分。 第一反射部分将来自第一透射部分的入射光束冷凝并反射，其中第一反射部分围绕第二透射部分形成。 第二反射部分将来自第一反射部分的入射光束聚集并反射到第二透射部分，其中第二反射部分围绕第一透射部分形成。

公开(公告)号：US06791933B1

公开(公告)日：2004-09-14

申请号：US09516507

申请日：2000-03-01

Applicant: Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

Inventor： Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

IPC: G11B712

CPC classification number: G11B7/1374 ,  G02B19/0028 ,  G02B19/0057 ,  G02B27/0944 ,  G11B7/127 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light sources emit a first light beam having a relatively shorter wavelength for the. DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit. A phase shift unit which is located between the optical path control unit and the objective lens, shifts the phase of the second light proceeding from the optical path control unit to the objective lens, to thereby reduce the size of a beam spot which is formed on a position of the information recording surface in the CD-R.

Abstract translation: 具有与使用根据要使用的记录介质的第一光束和第二光束中的一个的波长的可重写光盘（CD-R）和数字视频盘（DVD）兼容的光学拾取装置。 在光学拾取装置中，激光源发射具有相对较短波长的第一光束。 DVD和分别具有较长波长的CD-R的第二光束。 根据DVD中的信息记录表面的位置，物镜具有预定焦距。 光路控制单元控制光束的路径，使得从一个激光源发射的光束被引导到物镜，并且从物镜输出的光被引导到光学检测单元。 位于光路控制单元和物镜之间的相移单元将从光路控制单元向物镜移动的第二光的相位偏移，从而减小形成在光路控制单元 信息记录表面在CD-R中的位置。

公开(公告)号：US06639889B1

公开(公告)日：2003-10-28

申请号：US09594509

申请日：2000-06-16

Applicant: Jang-hoon Yoo ,  Chong-sam Chung ,  Chul-woo Lee ,  Kun-ho Cho

Inventor： Jang-hoon Yoo ,  Chong-sam Chung ,  Chul-woo Lee ,  Kun-ho Cho

IPC: G11B700

CPC classification number: G11B7/126 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A recording/reproducing apparatus including an optical pickup compatible with a plurality of optical recording media each using light of a different wavelength. The optical pickup includes at least one light source, an objective lens having a function of focusing light emitted from the light source into the optimal light spot on an information recording surface of one of the plurality of the optical recording media, and a light detector to detect light transmitted through the objective lens after being reflected from the information recording surface of the optical recording medium on which the light spot is formed. The objective lens has an inner area, an annular lens area and an outer area such that the annular lens area divides the inner area from the outer area and has a ring shape centered at a vertex. The inner area, the annular lens area and the outer area have aspherical surface shapes to focus light transmitted through the inner area and the outer area into a single light spot by which information can be read from the information recording surface of a relatively thin first optical recording medium and scatter light transmitted through the annular lens area located between the inner area and the outer area so that information cannot be read from the information recording surface of the first optical recording medium, during reproduction of the first optical recording medium. The inner area and the annular lens area transmit light into a single light spot by which information can be read from the information recording surface of a relatively thick second optical recording medium and scatters light transmitted through the outer lens area so that information cannot be read from the information recording surface of the second optical recording medium, during reproduction of the second optical recording medium.

Abstract translation: 一种记录/再现装置，包括与多个使用不同波长的光的多个光学记录介质兼容的光学拾取器。 光拾取器包括至少一个光源，具有将从光源发射的光聚焦到多个光学记录介质之一的信息记录表面上的最佳光点中的功能的物镜，以及光检测器 在从形成有光斑的光记录介质的信息记录面反射后，检测透过物镜的光。 物镜具有内部区域，环形透镜区域和外部区域，使得环形透镜区域将内部区域与外部区域分开并且具有以顶点为中心的环形。 内部区域，环形透镜区域和外部区域具有非球面形状，以将透过内部区域和外部区域的光聚焦成单个光点，通过该单个光点可以从相对薄的第一光学信息记录表面读取信息 记录介质和透射通过位于内部区域和外部区域之间的环形透镜区域的散射光，使得在第一光学记录介质的再现期间不能从第一光学记录介质的信息记录表面读取信息。 内部区域和环形透镜区域将光透射到单个光点中，通过该单个光点可以从相对较厚的第二光学记录介质的信息记录表面读取信息，并散射透过外部透镜区域的光，从而不能从 在第二光学记录介质的再现期间，第二光学记录介质的信息记录表面。

公开(公告)号：US06636464B1

公开(公告)日：2003-10-21

申请号：US09588224

申请日：2000-06-06

Applicant: Yong-jae Lee ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Byung-ryul Ryoo ,  Yong-ki Son

Inventor： Yong-jae Lee ,  Pyong-yong Seong ,  Jang-hoon Yoo ,  Byung-ryul Ryoo ,  Yong-ki Son

IPC: G11B700

CPC classification number: G11B7/1353 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/094 ,  G11B7/131

Abstract: An optical pickup device employing a signal detection unit including a hologram element having a plurality of pattern regions for diffracting and/or focusing light reflected and incident from a recording medium, a photodetector having a plurality of light receiving regions for receiving and photoelectrically converting the light diffracted by the hologram element and a signal operation unit for generating a focus error signal and/or a track error signal from a signal detected from the photodetector. The optical pickup device can implement a stable servo operation even at deviations of the photodetector, a change in the wavelength of light emitted from the light source, and/or shift of focusing means such as an objective lens, and can record and/or reproduce high-density information on/from the recording medium.

Abstract translation: 一种采用信号检测单元的光学拾取装置，包括具有多个图案区域的全息元件，用于衍射和/或聚焦从记录介质反射和入射的光;具有多个光接收区域的光电检测器，用于接收和光电转换光 由全息元件衍射，以及用于从从光电检测器检测的信号产生聚焦误差信号和/或轨道误差信号的信号操作单元。 光拾取装置即使在光电检测器的偏差，光源发射的光的波长变化和/或诸如物镜的聚焦装置的移动中也能够实现稳定的伺服操作，并且可以记录和/或再现 来自记录介质的高密度信息。

公开(公告)号：US06449237B1

公开(公告)日：2002-09-10

申请号：US09425673

申请日：1999-10-22

Applicant: Jang-Hoon Yoo ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong

Inventor： Jang-Hoon Yoo ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong

IPC: G11B700

CPC classification number: G11B7/1353 ,  G02B5/1876 ,  G11B7/1275 ,  G11B7/1378 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical recording and pickup head having a flat plate lens of a staircase type diffraction grating structure is compatible with a DVD and a CD-RW. The optical recording and pickup head includes a first optical source for emitting first light having a relatively short wavelength, a second optical source for emitting second light having a relatively long wavelength, a photo detector, an objective lens for focusing the light emitted from the first and second optical sources on the information recording surfaces of the optical discs, respectively, an optical path altering unit for transferring the light emitted from the first and second optical sources to the objective lens and transferring the first and second light reflected from the information recording surfaces of the plurality of discs to the photo detector, respectively, and a flat plate lens for substantially totally transmitting the first light proceeding from the optical path altering unit to the objective lens and diffracting the second light proceeding from the optical path altering unit to the optical axis of the objective lens.

Abstract translation: 具有楼梯型衍射光栅结构的平板透镜的光学记录和拾取头与DVD和CD-RW兼容。 光学记录和拾取头包括用于发射具有相对较短波长的第一光的第一光源，用于发射具有较长波长的第二光的第二光源，光检测器，用于将从第一光发射的光聚焦的物镜 和第二光源分别设置在光盘的信息记录表面上，光路改变单元，用于将从第一和第二光源发射的光转移到物镜，并传送从信息记录表面反射的第一和第二光 以及平板透镜，用于将从光路改变单元前进的第一光基本上全部透射到物镜，并将从光路改变单元行进的第二光衍射到光学检测器 物镜的轴线。

公开(公告)号：US06345029B1

公开(公告)日：2002-02-05

申请号：US09144648

申请日：1998-08-31

Applicant: Chul-Woo Lee ,  Jang-Hoon Yoo

Inventor： Chul-Woo Lee ,  Jang-Hoon Yoo

IPC: G11B700

CPC classification number: G11B7/1356 ,  G11B7/12 ,  G11B7/123 ,  G11B7/127 ,  G11B7/1381 ,  G11B7/139 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: An optical pickup apparatus and method which can selectively perform optical pickup with respect to at least two types of optical disks, on which information recording surfaces are formed, having a different thickness. The optical pickup apparatus includes an optical path alteration unit for altering a path of a light beam so that the light beam emitted from each light source proceeds toward the disk, a numerical aperture adjustment unit, including an annular shielding region which is disposed concentrically about an optical path axis between the optical path alteration unit and the disk supporter, for providing different numerical apertures according to a characteristic of a light beam to be incident; and an objective lens for respectively focusing the light beams having passed through the numerical aperture adjustment unit on the information recording surfaces of the disks to form a beam spot. Accordingly, the apparatus provides a relatively simple structure thereby reducing fabricating cost.

Abstract translation: 一种光拾取装置和方法，可以选择性地对形成有不同厚度的信息记录表面的至少两种类型的光盘执行光学拾取。 光拾取装置包括光路改变单元，用于改变光束的路径，使得从每个光源发射的光束朝向盘移动;数值孔径调节单元，包括环形屏蔽区域，该环形屏蔽区域围绕 光路改变单元和光盘支架之间的光路轴，用于根据入射光束的特性提供不同的数值孔径; 以及用于将经过数值孔径调节单元的光束分别聚焦在盘的信息记录表面上以形成束斑的物镜。 因此，该装置提供了相对简单的结构，从而降低了制造成本。

公开(公告)号：US06272096B1

公开(公告)日：2001-08-07

申请号：US09726018

申请日：2000-11-30

Applicant: Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

Inventor： Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

IPC: G11B700

Abstract: An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light sources emit a first light beam having a relatively shorter wavelength for the DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit. A phase shift unit which is located between the optical path control unit and the objective lens, shifts the phase of the second light proceeding from the optical path control unit to the objective lens, to thereby reduce the size of a beam spot which is formed on a position of the information recording surface in the CD-R.

公开(公告)号：US06259668B1

公开(公告)日：2001-07-10

申请号：US09467385

申请日：1999-12-21

Applicant: Chul-woo Lee ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Jang-hoon Yoo

IPC: G11B7135

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：US06243216B1

公开(公告)日：2001-06-05

申请号：US08508250

申请日：1995-07-27

Applicant: Jang-hoon Yoo ,  Pyong-yong Seong

Inventor： Jang-hoon Yoo ,  Pyong-yong Seong

IPC: G02B904

CPC classification number: G11B7/128 ,  G02F1/0102 ,  G02F1/0311 ,  G02F1/11

Abstract: A fast responding optical modulating device for a high-density recording using in an optical pickup includes a light source, an optical modulator and a pair of lenses. The pair of lenses are so arranged that the distance between the lenses is shorter than the sum of each focal length of the lenses. The device can adjust an optical spot size at the center of the optical modulator by changing the position of the lenses without altering the whole length between the light source and optical modulator. Therefore, the device can increase the rise time as desired and the optical efficiency in optical modulation for high-density recording which uses a short wavelength light source, and moreover, has an effect of simplifying the high-density recording.

Abstract translation: 用于在光学拾取器中使用的高密度记录的快速响应光学调制装置包括光源，光学调制器和一对透镜。 这对透镜被布置成使得透镜之间的距离比透镜的每个焦距的总和短。 该装置可以通过改变透镜的位置而不改变光源和光调制器之间的整个长度来调节光调制器中心处的光点尺寸。 因此，该装置可以根据需要增加上升时间和使用短波长光源的高密度记录的光学调制中的光学效率，此外，具有简化高密度记录的效果。

公开(公告)号：US06222812B1

公开(公告)日：2001-04-24

申请号：US08921386

申请日：1997-08-29

Applicant: Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

Inventor： Jang Hoon Yoo ,  Chul Woo Lee ,  Chong Sam Chung ,  Pyong Yong Seong ,  Kun Ho Cho ,  Hyun Seob Choi ,  Yong Hoon Lee ,  Tae Kyung Kim ,  No Kyong Park

IPC: G11B712

CPC classification number: G11B7/1374 ,  G02B19/0028 ,  G02B19/0057 ,  G02B27/0944 ,  G11B7/127 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical pickup apparatus having compatibility with a recodable compact disk (CD-R) and a digital video disk (DVD), which uses a wavelength of one of a first light beam and a second light beam according to the recording medium to be used. In the optical pickup apparatus, laser light sources emit a first light beam having a relatively shorter wavelength for the DVD and a second light beam having a longer wavelength for the CD-R, respectively. An objective lens has a predetermined focal length in accordance with the position of an information recording surface in the DVD. An optical path control unit controls the path of light beams so that the light beam emitted from one of the laser light sources is directed to the objective lens and the light output from the objective lens is directed to the optical detection unit. A phase shift unit which is located between the optical path control unit and the objective lens, shifts the phase of the second light proceeding from the optical path control unit to the objective lens, to thereby reduce the size of a beam spot which is formed on a position of the information recording surface in the CD-R.

Abstract translation: 具有与使用根据要使用的记录介质的第一光束和第二光束中的一个的波长的可重写光盘（CD-R）和数字视频盘（DVD）兼容的光学拾取装置。 在光拾取装置中，激光光源分别发射具有相对较短波长的第一光束和用于CD-R的具有较长波长的第二光束。 根据DVD中的信息记录表面的位置，物镜具有预定焦距。 光路控制单元控制光束的路径，使得从一个激光源发射的光束被引导到物镜，并且从物镜输出的光被引导到光学检测单元。 位于光路控制单元和物镜之间的相移单元将从光路控制单元向物镜移动的第二光的相位偏移，从而减小形成在光路控制单元 信息记录表面在CD-R中的位置。