公开(公告)号：US06590851B1

公开(公告)日：2003-07-08

申请号：US09690021

申请日：2000-10-17

申请人： Tae-kyung Kim ,  Chong-sam Chung ,  Young-man Ahn ,  Hea-jung Suh

发明人： Tae-kyung Kim ,  Chong-sam Chung ,  Young-man Ahn ,  Hea-jung Suh

IPC分类号： G11B700

CPC分类号： G11B7/1374 ,  G11B7/0037 ,  G11B7/1275 ,  G11B2007/0006 ,  G11B2007/13727

摘要： An optical pickup including: first and second light sources for generating first and second laser beams having different wavelengths corresponding to first and second media having different thicknesses, respectively; an objective lens that has diverging and converging/focusing portions, to focus the first and second laser beams from the first and second light sources onto the first and second media, respectively; a photodetector to receive the first and second laser beams that are emitted from the first and second light sources and reflected, respectively, by the first and second media; and a collimating lens arranged on the optical path between the objective lens, and the first and second light sources. The optical pickup is compatible with both existing digital versatile disks (DVDs), and high-definition (HD)-DVDs, which need a blue light source near 405 nm and an objective lens that has a numerical aperture of 0.6 or more.

摘要翻译： 一种光学拾取器，包括：第一和第二光源，用于分别产生对应于具有不同厚度的第一和第二介质的具有不同波长的第一和第二激光束; 具有发散和会聚/聚焦部分的物镜，分别将来自第一和第二光源的第一和第二激光束聚焦到第一和第二介质上; 光接收器，用于接收从第一和第二光源发射并分别由第一和第二介质反射的第一和第二激光束; 以及布置在物镜与第一和第二光源之间的光路上的准直透镜。 光拾取器与现有的数字通用盘（DVD）和需要405nm附近的蓝色光源的高清（HD）-DVD以及数值孔径为0.6或更大的物镜兼容。

公开(公告)号：US06563780B2

公开(公告)日：2003-05-13

申请号：US09793718

申请日：2001-02-27

申请人： Tae-kyung Kim ,  Chong-sam Chung ,  Young-man Ahn ,  Hea-jung Suh

发明人： Tae-kyung Kim ,  Chong-sam Chung ,  Young-man Ahn ,  Hea-jung Suh

IPC分类号： G11B700

CPC分类号： G11B7/13922 ,  G11B7/005 ,  G11B7/1395 ,  G11B2007/0006

摘要： An optical pickup compatible with optical discs having different formats. A first light source emits a first light beam suitable for a first format optical disc. An objective lens is optimized for a wavelength of the first light source. Light reflected from the first optical disc provides a reproduction signal. A second light source emits a second light beam suitable for a second format optical disc. A light splitter splits the second light beam and the objective lens focuses the split beams onto the second disc as a main light spot and a sub-light spot. Lights reflected from the main light spot and the sub-light spot are independently detected and then processed to correct for chromatic aberration caused by a difference in the wavelengths of the first and second light beams and/or spherical aberration caused by thickness difference between the first and second format optical discs.

摘要翻译： 与具有不同格式的光盘兼容的光学拾取器。 第一光源发射适合于第一格式光盘的第一光束。 针对第一光源的波长优化物镜。 从第一光盘反射的光提供再现信号。 第二光源发射适合于第二格式光盘的第二光束。 光分路器分裂第二光束，并且物镜将分束束聚焦到第二盘上作为主光点和次光点。 从主光点和副光点反射的光被独立地检测，然后被处理以校正由第一和第二光束的波长的差异引起的色差和/或由第一和第二光束之间的厚度差引起的球面像差 和第二格式光盘。

公开(公告)号：US06556520B1

公开(公告)日：2003-04-29

申请号：US09629049

申请日：2000-07-31

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

发明人： 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分类号： G11B700

CPC分类号： G11B7/00718 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/0941 ,  G11B7/0956

摘要： 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 disk, a header area detector, a first synchronous signal level detector a first, 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.

摘要翻译： 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，和信号盘，标题区检测器，第一同步信号电平检测器，第一，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的平衡的平衡计算器 同步信号电平检测器和由第二同步信号电平检测的第二同步信号的幅度Ivfo3 探测器。

公开(公告)号：US06507544B1

公开(公告)日：2003-01-14

申请号：US09663839

申请日：2000-09-15

申请人： Byung-in Ma ,  Byung-ho Choi ,  Chong-sam Chung ,  In-sik Park ,  Tae-yong Doh ,  Joong-eon Seo

发明人： Byung-in Ma ,  Byung-ho Choi ,  Chong-sam Chung ,  In-sik Park ,  Tae-yong Doh ,  Joong-eon Seo

IPC分类号： G11B700

CPC分类号： G11B7/0906 ,  G11B7/0956 ,  G11B7/131

摘要： An error signal detection apparatus for an optical recording/reproducing system which detects a tilt error signal and/or tracking error signal, based on the phase characteristics of light reflected and diffracted from a recording medium, and a method therefor. The error signal detection apparatus includes multiple photodetectors and a circuit unit for detecting an error signal by processing detection signals generated by each photodetector The the photodetectors are arranged in a matrix wherein a row or column of the matrix is parallel to a direction corresponding to a direction of an information stream on the recording medium. A circuit unit compares the phases of the detection signals of the inner and/or outer light receiving portions arranged in the same row or of detection signals from diagonal positions on the matrix to output at least one of a tilt error signal and a tracking error signal based on the phase comparison.

摘要翻译： 一种用于根据从记录介质反射和衍射的光的相位特性来检测倾斜误差信号和/或跟踪误差信号的光学记录/再现系统的误差信号检测装置及其方法。 误差信号检测装置包括多个光电检测器和用于通过处理由每个光电检测器产生的检测信号来检测误差信号的电路单元。光电检测器以矩阵排列，其中矩阵的行或列平行于与方向对应的方向 在记录介质上的信息流。 电路单元将布置在同一行中的内部和/或外部光接收部分的检测信号的相位或来自矩阵上的对角线位置的检测信号的相位相比较，以输出倾斜误差信号和跟踪误差信号中的至少一个 基于相位比较。

公开(公告)号：US06430139B1

公开(公告)日：2002-08-06

申请号：US09671710

申请日：2000-09-28

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

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

IPC分类号： G11B712

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

摘要： 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.

摘要翻译： 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：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：US5870369A

公开(公告)日：1999-02-09

申请号：US799928

申请日：1997-02-13

申请人： Chong-sam Chung ,  Chul-woo Lee ,  Pyong-yong Seong

发明人： Chong-sam Chung ,  Chul-woo Lee ,  Pyong-yong Seong

IPC分类号： G11B7/08 ,  G11B7/00 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G11B7/131 ,  G11B7/1381 ,  G11B7/13922 ,  G11B2007/0006 ,  G11B7/0901 ,  G11B7/0908

摘要： An objective lens device having two light control surfaces and an optical pickup able to adopt disks having different thicknesses as a recording medium. The objective lens device includes an objective lens arranged along an optical path parallel to the disks, and first and second control portions formed in a light incident surface of the objective lens, a light emitting surface thereof, or an extra transparent member. Therefore, two disks having different thicknesses are compatible as a recording medium, and light interference occurring when using a thick disk can be decreased.

摘要翻译： 具有两个光控制面的物镜装置和能够采用不同厚度的盘作为记录介质的光拾取器。 物镜装置包括沿着与盘平行的光路布置的物镜，以及形成在物镜的光入射面，其发光面或多透明构件中的第一和第二控制部。 因此，具有不同厚度的两个盘作为记录介质是兼容的，并且可以减少使用厚盘时发生的光干涉。

公开(公告)号：US5699340A

公开(公告)日：1997-12-16

申请号：US585253

申请日：1995-12-26

申请人： Chul-woo Lee ,  Kyung-hwa Rhim ,  Pyong-yong Seong ,  Chong-sam Chung

发明人： Chul-woo Lee ,  Kyung-hwa Rhim ,  Pyong-yong Seong ,  Chong-sam Chung

IPC分类号： G11B7/08 ,  G11B7/095 ,  G11B7/135

CPC分类号： G11B7/1365 ,  G11B7/0956

摘要： In a method and an apparatus for correcting aberration due to optical disk tilt, the apparatus includes a correction plate through which a first light beam passes by an object lens in an optical disk, a light source and a photo detector for generating and receiving a second light beam to detect the magnitude of the optical disk tilt, respectively, and an actuator for inclining the correction plate based on the detected signal. The correction plate has the same optical properties as those of the substrate of the optical disk, irrespective of the optical pick surroundings and offset the aberration due to the optical disk tilt. Therefore, while the best performance of the optical pickup is ensured, adverse effects caused by the aberration due to the optical disk tilt can be eliminated through simple circuitry.

摘要翻译： 在用于校正由于光盘倾斜引起的像差的方法和装置中，该装置包括：校正板，第一光束通过光盘中的物镜，光源和光电检测器，用于产生和接收第二光 光束分别检测光盘倾斜的大小，以及用于基于检测到的信号倾斜校正板的致动器。 校正板具有与光盘基板相同的光学特性，而与光拾取环境无关，并且偏移了由于光盘倾斜引起的像差。 因此，虽然确保了光学拾取器的最佳性能，但是可以通过简单的电路消除由于光盘倾斜引起的像差引起的不利影响。

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：US5353156A

公开(公告)日：1994-10-04

申请号：US997751

申请日：1992-12-30

申请人： Chong-sam Chung

发明人： Chong-sam Chung

IPC分类号： G02B13/16 ,  G02B13/18 ,  G02B27/00 ,  G02B27/18 ,  H04N5/74 ,  G02B9/64

CPC分类号： G02B13/18 ,  G02B27/0025

摘要： A projection lens system includes a first lens group for correcting spherical aberration and coma aberration, a second lens group for correcting chromatic aberration, a third lens group for providing the main optical power for the whole system, and a fourth lens group for correcting petzval aberration. The first, second and third lens groups are sequentially disposed forward of a screen in front of a dichromatic mirror, and the fourth lens group is disposed between the CRTs and dichromatic mirror. Further, the fourth lens group and CRTs form an enclosure and are filled with transparent cooling oil, thereby accomplishing a high-resolution color image having no chromatic aberration and using a reduced number of lenses.

摘要翻译： 投影透镜系统包括用于校正球面像差和彗形像差的第一透镜组，用于校正色像差的第二透镜组，用于为整个系统提供主光焦度的第三透镜组以及用于校正光泽像差的第四透镜组 。 第一透镜组，第二透镜组和第三透镜组依次布置在二色镜前面的屏幕的前方，第四透镜组设置在CRT和二色镜之间。 此外，第四透镜组和CRT形成外壳并且填充有透明冷却油，由此实现不具有色差的高分辨率彩色图像并且使用减少数量的透镜。