公开(公告)号：US6081498A

公开(公告)日：2000-06-27

申请号：US14621

申请日：1998-01-28

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

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

IPC: G11B7/135 ,  G11B7/00 ,  G11B7/12 ,  G11B7/125

CPC classification number: G11B7/1365 ,  G11B7/13922 ,  G11B2007/0006

Abstract: An optical pickup is compatible with at least two types of optical recording media each using light beams having different wavelengths from one another and which are used for recording and reproducing information. The optical pickup includes a first laser light source for emitting a first light beam having a relatively long wavelength, and a second laser light source for emitting a second light beam having a relatively short wavelength. A beam splitting plate transmits the first light beam and reflects the second light beam toward a collimator. The collimator collimates the light beam incident from the beam splitting plate to transmit the collimated light beam into an objective lens. The objective lens is designed so that the second light beam is focused on the information recording surface of a second optical recording medium whose information recording surface is closer to the objective lens than the information recording surface of the first optical recording medium, to form an optical spot optimized to the second optical recording medium. The optical distance from the first laser light source to the information recording surface of a first optical recording medium whose information recording surface is relatively farther from the objective lens, is shorter than the optical distance from the second laser light source to the information recording surface of the second optical recording medium so that spherical aberration occurring when the first light beam is used is removed. An aberration correction plate is located on an optical path between the first laser light source and the beam splitting plate, and corrects an optical aberration occurring when the beam splitting plate is used.

Abstract translation: 光学拾取器与至少两种类型的光学记录介质兼容，每种光学记录介质使用彼此不同波长的光束并且用于记录和再现信息。 光学拾取器包括用于发射具有较长波长的第一光束的第一激光光源和用于发射具有较短波长的第二光束的第二激光光源。 分束板透射第一光束并将第二光束反射到准直仪。 准直器准直从分束板入射的光束，将准直光束传输到物镜中。 物镜被设计成使得第二光束聚焦在其信息记录表面比第一光学记录介质的信息记录表面更靠近物镜的第二光学记录介质的信息记录表面上，以形成光学 对第二光记录介质进行优化。 从第一激光光源到其信息记录表面相对远离物镜的第一光记录介质的信息记录表面的光学距离比从第二激光光源到信息记录表面的光学距离短 第二光学记录介质，使得当使用第一光束时发生的球面像差被去除。 像差校正板位于第一激光光源和分束板之间的光路上，并且校正当使用分束板时发生的光学像差。

公开(公告)号：US6078555A

公开(公告)日：2000-06-20

申请号：US31540

申请日：1998-02-27

Applicant: Chul-Woo Lee ,  Jang-Hoon Yoo

Inventor： Chul-Woo Lee ,  Jang-Hoon Yoo

IPC: G11B7/135 ,  G11B7/00 ,  G11B7/08 ,  G11B7/12 ,  G11B7/125 ,  G11B7/20 ,  G11B7/09

CPC classification number: G11B7/127 ,  G11B7/12 ,  G11B2007/0006

Abstract: An optical head assembly having compatibility with a recordable compact disk (CD-R) and a digital video disk (DVD) includes a stationary first optical unit and a second optical unit which moves to a position to change the target sector of an optical disk loaded in an optical disk driver on which the incident beam is irradiated by travelling between an inner circumference and an outer circumference of the loaded optical disk. The first optical unit directs an emitted first light beam having a wavelength of 635 nm for a DVD to the second optical unit and detects information contained in the first light beam redirected from the second optical unit, if the DVD is the loaded optical disk. Meanwhile, the second optical unit focuses the first light beam incident from the first optical unit if the loaded optical disk is the DVD and an emitted second light beam having a wavelength of 780 nm for a CD-R on an information recording surface of the loaded optical disk if the CD-R is the loaded optical disk, transmits the first light beam reflected by the loaded DVD disk to the first optical unit, and detects information from the second light beam reflected by the loaded CD-R disk.

Abstract translation: 具有与可记录光盘（CD-R）和数字视盘（DVD）兼容的光学头组件包括固定的第一光学单元和第二光学单元，其移动到改变装载的光盘的目标扇区的位置 在光盘驱动器中，通过在装入的光盘的内圆周和外圆周之间行进照射入射光束。 第一光学单元将发射的具有635nm波长的第一光束引导到第二光学单元，并且如果DVD是装载的光盘，则检测包含在从第二光学单元重定向的第一光束中的信息。 同时，如果加载的光盘是DVD，则第二光学单元聚焦从第一光学单元入射的第一光束，并且在加载的信息记录表面上对于CD-R的发射的具有780nm波长的第二光束进行聚焦 光盘如果CD-R是装载的光盘，则将由加载的DVD盘反射的第一光束传输到第一光学单元，并且检测来自由加载的CD-R盘反射的第二光束的信息。

公开(公告)号：US6043912A

公开(公告)日：2000-03-28

申请号：US49988

申请日：1998-03-30

Applicant: Jang-Hoon Yoo ,  Chul-Woo Lee

Inventor： Jang-Hoon Yoo ,  Chul-Woo Lee

IPC: G11B7/08 ,  G02B5/32 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G11B7/20

CPC classification number: G11B7/1353 ,  G02B5/32 ,  G11B7/1275 ,  G11B7/1372 ,  G11B2007/0006

Abstract: An optical pickup apparatus compatible with at least two types of optical recording media, using light beams having respective different wavelengths for recording and reading information, the optical pickup apparatus including two laser light sources to emit light beams having the different wavelengths, respectively, a holographic lens, including a holographic ring, to transmittal of the light beams emitted from the laser light sources in an inner region of the holographic ring, and diffracting a specific light beam among the light beams emitted from the laser light sources in an outer region relative to the inner region, an objective lens to focus the light beams passed through the holographic ring lens on the respective information recording surfaces of the two types of the optical recording media, optical elements to alter optical paths of the light beams reflected from the information recording surfaces of the optical recording media; and two photodetectors to individually detect optical information from the light beams incident from the optical elements. The optical pickup apparatus is used compatibly with optical recording media by using the holographic lens to eliminate spherical aberration generated when an optical recording medium is changed to another medium having a different thickness, thereby providing advantages which include ease in construction of the holographic lens and good mass-production capabilities.

Abstract translation: 一种与至少两种类型的光学记录介质兼容的光学拾取装置，使用具有不同波长的光束来记录和读取信息，所述光学拾取装置包括两个激光源，分别发射具有不同波长的光束，全息图 透镜，包括全息环，以在全息环的内部区域中传输从激光源发出的光束，并且在相对于外部区域的外部区域中从激光源发射的光束中衍射特定光束 内部区域，用于将通过全息环透镜的光束聚焦在两种类型的光学记录介质的各个信息记录表面上的物镜，用于改变从信息记录表面反射的光束的光路的光学元件 的光学记录介质; 以及两个光电检测器，用于单独地检测从光学元件入射的光束的光学信息。 光学拾取装置通过使用全息透镜与光学记录介质兼容地使用，以消除当光学记录介质改变为具有不同厚度的另一种介质时产生的球面像差，从而提供了包括易于构建全息透镜的优点和良好的 批量生产能力。

公开(公告)号：US5777973A

公开(公告)日：1998-07-07

申请号：US761826

申请日：1996-12-06

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

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

IPC: G11B7/09 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/08 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135

CPC classification number: G11B7/1353 ,  G11B7/131 ,  G11B7/133 ,  G11B7/1367 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B2007/13727 ,  G11B7/0037 ,  G11B7/0909

Abstract: A reproducing/recording optical pickup compatible with discs having different thicknesses includes a transparent plate having a central portion formed with a diffraction grating pattern for diffracting the light travelling from the light source to the objective lens, and a transparent portion through which the light passes, and a photodetector having first and second light receiving portions. The zero-order transmitted light and the passing light are focused using all regions of the aperture of the objective lens with respect to a thin disc. The positive first-order diffracted light diffracted by the diffraction grating pattern of the transparent plate is focused onto a thick disc by partial regions of the objective lens. Then, the reflected lights thereof are detected by the first and second light receiving portions, respectively. Because signals for reproduction and servo for each disc are detected as the detection signals of the first and second light receiving portions, stable servo and noiseless reproduction are possible, irrespective of the thickness of the disc used.

Abstract translation: 与具有不同厚度的光盘兼容的再现/记录光学拾取器包括透明板，其具有形成有衍射光栅图案的中心部分，用于将从光源传播的光衍射到物镜，以及光通过的透明部分， 以及具有第一和第二光接收部分的光电检测器。 使用物镜的孔径的相对于薄盘的所有区域聚焦零级透射光和通过光。 由透明板的衍射光栅图案衍射的正一级衍射光被物镜的部分区域聚焦在厚盘上。 然后，其反射光分别由第一和第二光接收部分检测。 由于每个盘的再现和伺服信号被检测为第一和第二光接收部分的检测信号，所以与所使用的盘的厚度无关，可以进行稳定的伺服和无噪声再现。

公开(公告)号：US5703862A

公开(公告)日：1997-12-30

申请号：US587783

申请日：1995-12-26

Applicant: Chul-woo Lee ,  Jang-hoon Yoo

Inventor： Chul-woo Lee ,  Jang-hoon Yoo

IPC: G02B13/00 ,  G02B3/10 ,  G02B13/18 ,  G11B7/00 ,  G11B7/09 ,  G11B7/135

CPC classification number: G11B7/1374 ,  G11B2007/0006

Abstract: A dual-focus objective lens for an optical pickup which is compatible with both 0.6 mm and 1.2 mm disks is compensated in its aberration with respect to a light spot on a recording plane of the loaded disk and at least one of a light-receiving plane and a light-emitting plane of the dual focus objective lens has a first curvature unit and a second curvature unit whose curvature radii are different from each other. Incident light beams passing through the whole region of the first curvature unit and second curvature unit are focused onto the thinner disk, and parts of incident light beams passing through the region around the first curvature unit are focused onto the thicker disk. In the optical pickup having the dual focus objective lens, since the light is not divided, light efficiency is improved, thereby reproducing a signal with a high signal-to-noise ratio. Particularly, an optical pickup enabling recording as well as reproduction is obtained.

Abstract translation: 与0.6mm和1.2mm的光盘兼容的用于光学拾取器的双焦点物镜相对于装载盘的记录平面上的光斑的像差被补偿，并且光接收平面 并且双焦点物镜的发光面具有第一曲率单位和曲率半径彼此不同的第二曲率单位。 通过第一曲率单位和第二曲率单位的整个区域的入射光束被聚焦到较薄的盘上，并且穿过第一曲率单位周围的区域的入射光束的一部分聚焦在较厚的盘上。 在具有双重聚焦物镜的光学拾取器中，由于光不被分割，所以光效率提高，从而再现具有高信噪比的信号。 特别地，获得了能够进行记录和再现的光学拾取器。

公开(公告)号：US07590034B2

公开(公告)日：2009-09-15

申请号：US11944863

申请日：2007-11-26

Applicant: Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

Inventor： Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

IPC: G11B7/00

CPC classification number: G11B7/00718 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0956

Abstract: An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull signal RF_pp from an optical signal reflected from the disk, a header area detector for generating a header area signal including a header area from the reproducing signal, a first synchronous signal level detector for detecting a magnitude Ivfo1 of a first synchronous signal in the first header by being synchronized with the header area signal, a second synchronous signal level detector for detecting a magnitude Ivfo3 of a second synchronous signal in the second header by being synchronized with the header area signal, and a balance calculator for calculating the balance of the magnitude Ivfo1 and the magnitude Ivfo3.

Abstract translation: 一种用于在盘中记录数据并将数据从记录区域划分成扇区的装置，包括用于产生包括径向对的和信号V1和V2的再现信号的再现信号发生器，和信号RF_sum和推送 从光盘反射的光信号的信号RF_pp，用于产生包含来自重放信号的标题区的标题区信号的标题区检测器，用于检测第一同步信号的幅度Ivfo1的第一同步信号电平检测器， 第一头部与头部区域信号同步;第二同步信号电平检测器，用于通过与头部区域信号同步来检测第二个头部中的第二同步信号的幅度Ivfo3;以及平衡计算器， 幅度Ivfo1和幅度Ivfo3。

公开(公告)号：US20070025229A1

公开(公告)日：2007-02-01

申请号：US11290457

申请日：2005-12-01

Applicant: Bong-Gi Kim ,  Soo-Han Park ,  Young-Man Ahn ,  Jang-Hoon Yoo

Inventor： Bong-Gi Kim ,  Soo-Han Park ,  Young-Man Ahn ,  Jang-Hoon Yoo

IPC: G11B7/135

CPC classification number: G11B7/1356 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/13927 ,  G11B7/1395 ,  G11B2007/0006

Abstract: An optical pickup apparatus according to an embodiment of the present invention, comprises an optical unit for projecting a plurality of wavelengths of light, the light including a celadon light, toward a recording medium and receiving the light reflected from the recording medium to thereby detect an information signal and an error signal, and a compatible objective lens for focusing a light projected from the optical unit to thereby form an optical spot on a recording surface of the recording medium and applying at least three light having different wavelength ranges to be compatibly used for both the high-density and the low-density recording mediums. Accordingly, the optical pickup apparatus is capable of compatibly employing a high-density recording medium, which uses a celadon light and is slimmer than a digital versatile disc (DVD), and at least one low-density recording medium.

Abstract translation: 根据本发明实施例的光学拾取装置包括一个光学单元，用于将多个波长的光（包括青瓷光的光）投射到记录介质上，并接收从记录介质反射的光，从而检测一个 信息信号和误差信号，以及用于聚焦从光学单元投影的光的兼容物镜，从而在记录介质的记录表面上形成光点，并且将至少三个具有不同波长范围的光并入，用于 高密度和低密度记录介质。 因此，光拾取装置能够兼容使用青瓷光的高密度记录介质，并且比数字通用盘（DVD）更薄，以及至少一种低密度记录介质。

公开(公告)号：US07167424B2

公开(公告)日：2007-01-23

申请号：US10385472

申请日：2003-03-12

Applicant: Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

Inventor： Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

IPC: G11B7/00

CPC classification number: G11B7/00718 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0956

Abstract: A method of detecting a servo error, an apparatus therefor, a disk which maintains quantity of a servo error signal, a method of controlling a servo of an apparatus for recording data on and reproducing data from a disk, a method of detecting the tracking error, and a method of detecting tilt error of the apparatus. The apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, each sector has a header for indicating an address, each header has a first header and a second header which are recorded to deviate from the center of the track in opposite directions, and the first header and the second header have address areas in which the addresses of sectors are recorded and synchronous signal areas in which synchronous signals for detecting the address signals recorded in the address area are recorded, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull signal RF_pp from an optical signal reflected from the disk, a header area detector for generating a header area signal including a header area from the reproducing signal received from the reproducing signal generator, a first synchronous signal level detector for receiving the output of the reproducing signal generator and detecting a magnitude Ivfo1 of a first synchronous signal in the first header by being synchronized with the header area signal received from the header area detector, a second synchronous signal level detector for receiving the output of the reproducing signal generator and detecting a magnitude Ivfo3 of a second synchronous signal in the second header by being synchronized with the header area signal received from the header area detector, and a balance calculator for calculating the balance of the magnitude Ivfo1 of the first synchronous signal detected by the first synchronous signal level detector and the magnitude Ivfo3 of the second synchronous signal detected by the second synchronous signal level detector. As a result, it is possible for the recording/reproducing apparatus to stably control a servo therein and maintain an optimal recording/reproducing state since the apparatus for detecting the servo error correctly detects the servo error state of the disk.

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：US07110334B2

公开(公告)日：2006-09-19

申请号：US11095481

申请日：2005-04-01

Applicant: Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

Inventor： Seong-sin Joo ,  In-sik Park ,  Byung-in Ma ,  Chong-sam Chung ,  Jang-hoon Yoo ,  Jung-wan Ko ,  Kyung-geun Lee ,  Joong-eon Seo

IPC: G11B5/09 ,  G11B7/00

CPC classification number: G11B7/00718 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0956

Abstract: An apparatus for recording data on and reproducing data from the disk in which a recording area is divided into sectors, includes a reproducing signal generator for generating a reproducing signal including sum signals V1 and V2 of radial pairs, a sum signal RF_sum, and a push-pull signal RF_pp from an optical signal reflected from the disk, a header area detector for generating a header area signal including a header area from the reproducing signal, a first synchronous signal level detector for detecting a magnitude Ivfo1 of a first synchronous signal in the first header by being synchronized with the header area signal, a second synchronous signal level detector for detecting a magnitude Ivfo3 of a second synchronous signal in the second header by being synchronized with the header area signal, and a balance calculator for calculating the balance of the magnitude Ivfo1 and the magnitude Ivfo3.