公开(公告)号：US07072114B2

公开(公告)日：2006-07-04

申请号：US11259262

申请日：2005-10-27

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: G02B5/18

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 laser light sources emit a first light beam having a relatively shorter wavelength for a DVD and a second light beam having a longer wavelength for a CD-R, an objective lens having a focal length of an information recording surface in the DVD, an optical path control unit controls the 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, and a phase shift unit between the optical path control unit and the objective lens and which shifts a phase of the second light to reduce the size of a beam spot which is formed the information recording surface in the CD-R.

公开(公告)号：US20060120248A1

公开(公告)日：2006-06-08

申请号：US11337584

申请日：2006-01-24

Applicant: Bong-gi Kim ,  Soo-han Park ,  Jang-hoon Yoo

Inventor： Bong-gi Kim ,  Soo-han Park ,  Jang-hoon Yoo

IPC: G11B7/135

CPC classification number: G11B7/1353 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/1381

Abstract: A diffraction element for an optical pick-up apparatus is provided that enables more accurate focusing control. The diffraction element for an optical pick-up apparatus is divided into first and second regions, each being formed with a grid pattern in which grids are repeated with a predetermined pitch P. The grid pattern in at least one of the first and second regions is tilted by a predetermined angle with respect to a virtual line VL substantially perpendicular to a division line DL that divides the first and second regions.

公开(公告)号：US07046611B2

公开(公告)日：2006-05-16

申请号：US09930964

申请日：2001-08-17

Applicant: Jang-Hoon Yoo ,  Chul-Hoo Lee

Inventor： Jang-Hoon Yoo ,  Chul-Hoo Lee

IPC: G11B7/00

CPC classification number: G11B7/1353 ,  G02B5/32 ,  G11B7/1275 ,  G11B7/1372 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

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, a holographic lens including a holographic ring to transmit the light beams incident in an inner region of the holographic ring, and to diffract a specific light beam among the light beams emitted from the laser light sources incident 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 to corresponding photodetectors.

公开(公告)号：US06556521B1

公开(公告)日：2003-04-29

申请号：US09629050

申请日：2000-07-31

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: G11B700

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, a sum signal RF_sum, and a push-pull signal RF_pp from an optical signal reflected from the disk, a header area detector, a first synchronous signal level detector, a second synchronous signal level 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.

Abstract translation: 一种检测伺服误差的方法，其装置，保持伺服误差信号量的盘，控制用于从盘记录数据和从盘再现数据的装置的伺服的方法，检测跟踪误差的方法 以及检测装置的倾斜误差的方法。 用于在盘中记录数据并从其再现数据的装置，其中记录区被划分为扇区，每个扇区具有用于指示地址的标题，每个标题具有被记录为偏离中心的第一标题和第二标题 并且第一标题和第二标题具有其中记录了扇区的地址的地址区域，并且记录了用于检测记录在地址区域中的地址信号的同步信号的同步信号区域，包括再现 信号发生器，和信号RF_sum和从盘反射的光信号的推挽信号RF_pp，标题区检测器，第一同步信号电平检测器，第二同步信号电平检测器和用于计算 由第一同步信号电平检测器检测的第一同步信号的幅度Ivfo1的平衡和秒的幅度Ivfo3 由第二同步信号电平检测器检测到的同步信号。

公开(公告)号：US06400658B1

公开(公告)日：2002-06-04

申请号：US09275814

申请日：1999-03-25

Applicant: Chang-Jin Yang ,  Pyong-Yong Seong ,  Seong-Sin Joo ,  Soo-Yul Jung ,  Jung-Eon Seo ,  Yong-Jae Lee ,  Jang-Hoon Yoo ,  Tae-Kyung Kim

Inventor： Chang-Jin Yang ,  Pyong-Yong Seong ,  Seong-Sin Joo ,  Soo-Yul Jung ,  Jung-Eon Seo ,  Yong-Jae Lee ,  Jang-Hoon Yoo ,  Tae-Kyung Kim

IPC: G11B17221

CPC classification number: G11B27/24 ,  G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B19/04 ,  G11B20/18 ,  G11B27/3027 ,  G11B2220/216 ,  G11B2220/2575

Abstract: A DVD-RAM disk reproduction apparatus for reducing an error during detection of ID data, which includes a first operational amplifier for obtaining a sum signal resulting from the addition of four picked-up signals picked up by divided-by-four photodiodes from a DVD-RAM disk having a header region and a recording region, second and third operational amplifiers for respectively obtaining two sum signals corresponding to the upper and lower regions of the header region resulting from the addition of the first and second picked-up signals and the third and fourth picked-up signals, respectively, a fourth operational amplifier for obtaining a difference signal between the two sum signals, a header region detector for detecting upper and lower header region signals corresponding to the upper header region and the lower header region based on the difference signal, and detecting a header region signal corresponding to a header region by logically summing the two detected signals, a first multiplexer for selecting one of the two sum signals obtained by the second and third operational amplifiers according to the upper header region signal, and a second multiplexer for selecting the sum signal selected by the first operational amplifier and the sum signal selected by the first multiplexer according to the header region signal, to thereby output the selected result to an equalizer. Thus, during detection of ID data in a header region, a difference signal between the picked-up four signals is not used, but a signal resulting from the addition of two signals among the picked-up signals according to the corresponding upper and lower regions of the header region is selectively used. Accordingly, ID data can be detected from a signal without deterioration, to thereby reduce an error and thus improve a detection margin.

Abstract translation: 一种用于在ID数据检测期间减少误差的DVD-RAM盘再现装置，其包括第一运算放大器，用于获得由DVD的四分之一光电二极管拾取的四个拾取信号的相加而得到的和信号 -RAM盘，具有标题区域和记录区域，第二和第三运算放大器，用于分别获得对应于由所述第一和第二拾取信号的相加产生的标题区域的上部和下部区域的两个和信号，以及第三个 和第四拾取信号，分别用于获得两个和信号之间的差分信号的第四运算放大器，用于检测对应于上标题区域和下标题区域的上标题区域信号和下标头区域信号的标题区域检测器， 差分信号，并且通过对两个检测到的信号进行逻辑求和来检测与标题区域相对应的标题区域信号，第一个mul 层叠器，用于根据上标头区域信号选择由第二和第三运算放大器获得的两个和信号之一;以及第二多路复用器，用于选择由第一运算放大器选择的和信号和由第一多路复用器选择的和信号， 到标题区域信号，从而将所选择的结果输出到均衡器。 因此，在标题区域中的ID数据的检测期间，不使用拾取的四个信号之间的差分信号，而是根据相应的上部和下部区域在拾取信号之间添加两个信号而产生的信号 选择使用标题区域。 因此，可以从信号中检测ID数据而不劣化，从而减少误差，从而提高检测余量。

公开(公告)号：US06363046B1

公开(公告)日：2002-03-26

申请号：US09049990

申请日：1998-03-30

Applicant: Jang-Hoon Yoo ,  Chul-Woo Lee

Inventor： Jang-Hoon Yoo ,  Chul-Woo Lee

IPC: G11B700

CPC classification number: G11B7/1353 ,  G11B7/1275 ,  G11B7/1365 ,  G11B2007/0006

Abstract: An optical recording/pickup head having compatibility with a recordable compact disk (CD-R) and a digital video disk (DVD) transmits a first light beam having a wavelength of 635 nm for a DVD emitted from a first light source and a second light beam having a wavelength of 780 nm for a CD-R emitted from a second light source to an objective lens, using a holographic variable aperture. The holographic variable aperture totally transmits the incident first light beam to the objective lens, and transmits part of the incident second light beam to the objective lens. The objective lens focuses the incident first and second light beams on the information recording surfaces of the CD-R and the DVD. The sizes of the light spots which are focussed on the information recording surfaces of the DVD and the CD-R by the objective lens are approximately 0.9 &mgr;m and 1.4 &mgr;m, respectively, which appropriate for recording and reproducing the respective disks. The light spots have only a main lobe.

Abstract translation: 具有与可记录光盘（CD-R）和数字视频盘（DVD）兼容的光学记录/拾取头将从第一光源发射的DVD发射具有635nm波长的第一光束和第二光 使用全息可变孔径从第二光源发射到物镜的CD-R的波长为780nm的光束。 全息可变孔径将入射的第一光束全部透射到物镜，并将入射的第二光束的一部分透射到物镜。 物镜将入射的第一和第二光束聚焦在CD-R和DVD的信息记录表面上。 通过物镜聚焦在DVD和CD-R的信息记录表面上的光斑的大小分别大约为0.9μm和1.4μm，这适合于记录和再现各个光盘。 光点只有一个主瓣。

公开(公告)号：US06337841B1

公开(公告)日：2002-01-08

申请号：US09425887

申请日：1999-10-25

Applicant: Kun-Soo Kim ,  Jong-Ryull Kim ,  Myoung-Soo Choi ,  Hyung-Taek Oh ,  Jong-Hwa Yu ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong ,  Jang-Hoon Yoo

Inventor： Kun-Soo Kim ,  Jong-Ryull Kim ,  Myoung-Soo Choi ,  Hyung-Taek Oh ,  Jong-Hwa Yu ,  Chul-Woo Lee ,  Kun-Ho Cho ,  Pyong-Yong Seong ,  Jang-Hoon Yoo

IPC: G11B700

CPC classification number: G02B5/1876 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: A compatible optical pickup capable of recording or reproducing information on or from compact disc (CD) family media such as CD rewritable (CD-RW) and digital versatile disc (DVD) by adopting a stepped planar lens having a plurality of gratings. The compatible optical pickup includes a first optical source for emitting a first light beam having a predetermined wavelength; a second optical source for emitting a second light beam having a long wavelength relative to the first light beam; an optical path changing element for changing the traveling path of an incident light beam; an objective lens for condensing the first and second light beams onto optical discs having different thicknesses, respectively; an optical diffraction element having a first region which directly transmits the first and second light beams incident thereto, and a second region bounding the first region, which directly transmits the incident first light beam and diffractingly transmits the second light beam toward an optical axis; and a photodetector for detecting an information signal and an error signal from the first and second light beam which have been reflected by the optical discs and passed through the optical path changing element. Also, the optical diffraction element is a stepped planar lens in which one or more stepped pattern periods each having a plurality of annular gratings are arranged in the second region, wherein the depths of the gratings become smaller moving away from the optical axis, and the maximum depth thereof is a predetermined value.

Abstract translation: 一种兼容的光学拾取器，其能够通过采用具有多个光栅的阶梯式平面透镜来记录或再现诸如CD可重写（CD-RW）和数字通用光盘（DVD）的光盘（CD）族介质上的信息。 兼容光学拾取器包括用于发射具有预定波长的第一光束的第一光源; 用于发射相对于第一光束具有长波长的第二光束的第二光源; 用于改变入射光束的行进路径的光路改变元件; 用于将第一和第二光束分别聚光到具有不同厚度的光盘上的物镜; 光学衍射元件，其具有直接透射入射到其上的第一和第二光束的第一区域和限定第一区域的第二区域，该第二区域直接透射入射的第一光束并将第二光束衍射地朝向光轴传播; 以及光检测器，用于检测已被光盘反射并通过光路改变元件的来自第一和第二光束的信息信号和误差信号。 此外，光学衍射元件是阶梯式平面透镜，其中在第二区域中布置有具有多个环形光栅的一个或多个阶梯图案周期，其中光栅的深度变得较小，远离光轴移动，并且 其最大深度是预定值。

公开(公告)号：US06285646B1

公开(公告)日：2001-09-04

申请号：US09198451

申请日：1998-11-24

Applicant: Jang-Hoon Yoo ,  Yong-Jae Lee ,  Pyong-Yong Seong ,  Chul-Woo Lee

Inventor： Jang-Hoon Yoo ,  Yong-Jae Lee ,  Pyong-Yong Seong ,  Chul-Woo Lee

IPC: G11B700

CPC classification number: G11B7/1374 ,  G11B2007/0006

Abstract: An optical pickup device including an objective lens which is compatible with a plurality of optical disks of respectively different specifications, such as a digital versatile disk (DVD), a compact disk-recordable (CD-R) medium, a compact disk (CD) and a laser disk (LD). The optical pickup device includes a laser source to emit light, an objective lens to focus the light emitted from the laser source on respective information recording surfaces of a plurality of optical recording media as an optimal optical spot, and an optical detector to detect light reflected from the information recording surface of the optical recording medium on which the optical spot has been focused and transmitted through the objective lens. The objective lens includes a first lens area, a second lens area, and a third lens area to focus the light emitted from the laser source. The first lens area has an aspherical surface corresponding to a first optical recording medium and a second optical recording medium, the second lens area has an aspherical surface corresponding to the second optical recording medium, and the third lens area has an aspherical surface corresponding to the first optical recording medium. As a result, the optical pickup can be compatible with a plurality of the optical disks of a respectively different specification irrespective of the thickness of the disk.

Abstract translation: 一种光学拾取装置，包括与分别不同规格的多个光盘兼容的物镜，诸如数字通用盘（DVD），可压缩盘可记录（CD-R）介质，光盘（CD） 和激光盘（LD）。 光拾取装置包括用于发光的激光源，将从激光源发射的光聚焦到作为最佳光点的多个光记录介质的各个信息记录表面上的物镜，以及检测反射光的光检测器 从其上已经聚焦并透过物镜的光记录介质的信息记录表面。 物镜包括第一透镜区域，第二透镜区域和用于聚焦从激光源发射的光的第三透镜区域。 第一透镜区域具有对应于第一光学记录介质和第二光学记录介质的非球面，第二透镜区域具有对应于第二光学记录介质的非球面，并且第三透镜区域具有对应于第二光学记录介质的非球面 第一光记录介质。 结果，光拾取器可以与分别不同规格的多个光盘兼容，而与盘的厚度无关。

公开(公告)号：US06198714B1

公开(公告)日：2001-03-06

申请号：US09505155

申请日：2000-02-15

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: G11B7/1353 ,  G11B7/126 ,  G11B7/127 ,  G11B7/131 ,  G11B7/1356 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B2007/13727

Abstract: 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：US5907530A

公开(公告)日：1999-05-25

申请号：US708200

申请日：1996-09-06

Applicant: Kun-ho Cho ,  Eung-ho Kim ,  Jang-hoon Yoo ,  Kyung-hwa Rim

Inventor： Kun-ho Cho ,  Eung-ho Kim ,  Jang-hoon Yoo ,  Kyung-hwa Rim

IPC: G02B3/10 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

CPC classification number: G02B3/10 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1353 ,  G11B7/1365 ,  G11B7/1381 ,  G11B2007/0006 ,  G11B7/0037

Abstract: An optical pickup device which is capable of reproducing and recording information from at least two discs having different thicknesses includes a light source, an objective lens provided along the light path from the light source facing the plane of a disc and having a predetermined effective diameter, a beam splitter provided between the objective lens and the light source, a photodetector for detecting the beam split from the light splitter and reflected from the disc, and light controller provided along the light path facing the photodetector lens for controlling the light of the intermediate region between near- and far axis regions of an incident light beam. The optical pickup device is simplified and the manufacturing cost therefor is low. Also, by reducing the spherical aberration effect for the light, discs having different thicknesses can be used in a single disc drive.

Abstract translation: 能够从具有不同厚度的至少两个盘再现和记录信息的光学拾取装置包括光源，沿着从光源面向光盘的光源的光路设置并具有预定有效直径的物镜， 设置在物镜和光源之间的分束器，用于检测从分光器分离并从盘反射的光束的光电检测器，以及沿着面向光电检测器透镜的光路设置的光控制器，用于控制中间区域的光 在入射光束的近轴和远轴区域之间。 光拾取装置简化，制造成本低。 此外，通过减小光的球面像差效应，可以在单个盘驱动器中使用具有不同厚度的盘。