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11. 发明授权

US06198714B1 Optical pickup having an objective lens compatible with a plurality of optical disk formats 有权
标题翻译：具有与多个光盘格式兼容的物镜的光学拾取器
公开(公告)号：US06198714B1
公开(公告)日：2001-03-06
申请号：US09505155
申请日：2000-02-15
申请人： Jang-hoon Yoo , Chong-sam Chung , Chul-woo Lee , Kun-ho Cho
发明人： Jang-hoon Yoo , Chong-sam Chung , Chul-woo Lee , Kun-ho Cho
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/126 , G11B7/127 , G11B7/131 , G11B7/1356 , G11B7/1367 , G11B7/1374 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： 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.
摘要翻译：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。

12. 发明授权

US6091691A Optical pickup having an objective lens compatible with a plurality of optical disk formats 失效
标题翻译：具有与多个光盘格式兼容的物镜的光学拾取器
公开(公告)号：US6091691A
公开(公告)日：2000-07-18
申请号：US23046
申请日：1998-02-13
申请人： Jang-hoon Yoo , Chong-sam Chung , Chul-woo Lee , Kun-ho Cho
发明人： Jang-hoon Yoo , Chong-sam Chung , Chul-woo Lee , Kun-ho Cho
IPC分类号： G11B7/00 , G11B7/125 , G11B7/13 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/126 , G11B7/127 , G11B7/131 , G11B7/1356 , G11B7/1367 , G11B7/1374 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： 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, and a light detector. 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.
摘要翻译：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较薄的第一个信息记录表面读取信息光学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，使得在再现第一光学记录介质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。

13. 发明授权

US5802037A Optical detector with two detecting regions for reproducing and recording information on two kinds of disks having different thicknesses 失效
标题翻译：具有两个检测区域的光学检测器，用于在具有不同厚度的两种盘上再现和记录信息
公开(公告)号：US5802037A
公开(公告)日：1998-09-01
申请号：US708988
申请日：1996-09-06
申请人： Chul-woo Lee , Kyung-hwa Rim , Chong-sam Chung , Kun-ho Cho , Jang-hoon Yoo , Soo-yeul Jung
发明人： Chul-woo Lee , Kyung-hwa Rim , Chong-sam Chung , Kun-ho Cho , Jang-hoon Yoo , Soo-yeul Jung
IPC分类号： G11B7/08 , G11B7/00 , G11B7/09 , G11B7/13
CPC分类号： G11B7/131 , G11B7/0909 , G11B7/133 , G11B2007/0006
摘要： An optical pickup device which is capable of reproducing and recording information from/onto at least two kinds of 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, and a photodetector for detecting the beam split from the light splitter and reflected from the disc, wherein the photodetector has a first detection region and a second detection region provided in the peripheral portion of the first detection region. 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 for a single disc drive.
摘要翻译：能够从具有不同厚度的至少两种光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面的光路设置的物镜，具有设置在所述物镜和所述光源之间的分束器，以及用于检测从所述分光器分离并从所述光盘反射的光束的光电检测器，其中所述光电检测器具有第一检测区域和设置在所述光源中的第二检测区域第一检测区域的周边部分。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，可以将具有不同厚度的盘用于单个盘驱动器。

14. 发明授权

US5777973A Reproducing and recording optical pickup compatible with discs having different thicknesses 失效
标题翻译：复制和记录与不同厚度的光盘兼容的光学拾取器
公开(公告)号：US5777973A
公开(公告)日：1998-07-07
申请号：US761826
申请日：1996-12-06
申请人： Jang-hoon Yoo , Chong-sam Chung , Chul-woo Lee , Kyung-hwa Rim , Kun-ho Cho
发明人： Jang-hoon Yoo , Chong-sam Chung , Chul-woo Lee , Kyung-hwa Rim , Kun-ho Cho
IPC分类号： G11B7/09 , G11B7/00 , G11B7/0037 , G11B7/08 , G11B7/125 , G11B7/13 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/131 , G11B7/133 , G11B7/1367 , G11B7/1381 , G11B2007/0006 , G11B2007/13727 , G11B7/0037 , G11B7/0909
摘要： 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.
摘要翻译：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。

15. 发明授权

US06646976B1 Optical pickup apparatus capable of reducing cross talk by adjacent tracks and a method therefor 失效
标题翻译：能够减少相邻轨道串扰的光拾取装置及其方法
公开(公告)号：US06646976B1
公开(公告)日：2003-11-11
申请号：US09461290
申请日：1999-12-15
申请人： Chong-sam Chung , Young-man Ahn , Tae-kyung Kim , Hea-jung Suh , Seung-tae Jung , Chul-woo Lee , In-sik Park , Dong-ho Shin
发明人： Chong-sam Chung , Young-man Ahn , Tae-kyung Kim , Hea-jung Suh , Seung-tae Jung , Chul-woo Lee , In-sik Park , Dong-ho Shin
IPC分类号： G11B700
CPC分类号： G11B7/005 , G11B7/131 , G11B7/1353 , G11B20/22 , G11B2220/2579
摘要： An optical pickup apparatus which reduces cross talk by adjacent tracks. The optical pickup apparatus divides light reflected from an optical recording medium as a spot into center and side portions defined with respect to the radial direction of the recording medium and provides electrical signals corresponding to the reflected light in divided form. An operation unit multiplies signals corresponding to the side portions by an operation constant, adds the multiplication results and the detected signal of the center portion, and outputs an information signal of a main track with reduced cross talk by adjacent tracks in real time. The optical efficiency is sufficient that recording of an information signal can be performed with the optical pickup.
摘要翻译：一种减少相邻轨道串扰的光拾取装置。光学拾取装置将从光记录介质反射的光作为点分成中心和相对于记录介质的径向限定的侧部，并且以分开的形式提供对应于反射光的电信号。操作单元将与侧面部分对应的信号乘以运算常数，将相乘结果和检测到的中心部分的信号相加，并实时地通过相邻轨道输出具有减小的串扰的主轨道的信息信号。光学效率足以利用光学拾取器进行信息信号的记录。

16. 发明授权

US06314067B1 Optical disk having pattern for tilt detection 失效
标题翻译：具有用于倾斜检测的图案的光盘
公开(公告)号：US06314067B1
公开(公告)日：2001-11-06
申请号：US09267710
申请日：1999-03-15
申请人： Chong-sam Chung , Chul-woo Lee , In-sik Park
发明人： Chong-sam Chung , Chul-woo Lee , In-sik Park
IPC分类号： G11B709
CPC分类号： G11B7/0938 , G11B7/007 , G11B7/00745 , G11B7/0956 , G11B7/24085
摘要： An optical disk has a pattern for detecting an amount of a tilt of a disk. The optical disk has a code train having a pit pattern or a mirror pattern which is recorded on a concentrically or spirally formed track, such that a tilt detection pattern having a predetermined code train is recorded at least in a partial area of the disk. Thus, since a pattern for tilt detection is recorded in a portion of a disk, a tilt of a disk can be detected by a common quadrant photodetector without an additional apparatus such as a photo coupler.
摘要翻译：光盘具有用于检测盘的倾斜量的图案。光盘具有代码串，其具有凹坑图案或记录在同心或螺旋形成的轨道上的反射镜图案，使得具有预定代码串的倾斜检测图案至少记录在盘的部分区域中。因此，由于用于倾斜检测的图案被记录在盘的一部分中，所以可以通过共用象限光检测器来检测盘的倾斜，而不需要光耦合器等附加装置。

17. 发明授权

US5629514A Critical angle focus error detector 失效
标题翻译：临界角聚焦误差检测器
公开(公告)号：US5629514A
公开(公告)日：1997-05-13
申请号：US458165
申请日：1995-06-02
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： G11B7/09 , G11B7/135 , G01J1/20 , G11B7/00
CPC分类号： G11B7/1356 , G11B7/0908 , G11B7/0917 , G11B7/0943 , G11B2007/0919
摘要： A focus error detector for detecting a signal representing a degree of a focus error of an objective lens with respect to an optical disk in an optical pickup, in order to eliminate errors due to an optical axis shift or tilt of the reflected light reflected from the optical disk, includes a diffraction device for diffracting and splitting the reflected light reflected. The focus error detector a critical angle reflector having critical angle reflecting planes for reflecting the two diffracted light rays at two critical angles, two bi-segmented photo-detectors for receiving the two diffracted light rays reflected from the critical angle reflector, respectively, and detecting signals depending on the received light amount, and a circuit for differentiating and summing each signal of the two bi-segmented photo-detectors so as to offset the light amount difference due to the tilt or shift of the reflected light and outputting a desired signal. Therefore, only an original focus error signal is output, irrespective of an optical shift or tilt of the reflected light, so that malfunction of the optical pickup is prevented and clean recording and reproduction is enabled.
摘要翻译：一种聚焦误差检测器，用于检测表示物镜相对于光学拾取器中的光盘的聚焦误差的程度的信号，以便消除由于光学偏移反射的反射光的光轴偏移或倾斜引起的误差光盘包括用于衍射和分裂反射的反射光的衍射装置。聚焦误差检测器，具有用于以两个临界角度反射两个衍射光线的临界角反射面的临界角反射镜，分别用于接收从临界角反射器反射的两个衍射光线的两个双段光电检测器，信号，以及用于对两个双分段光电检测器的每个信号进行微分和求和以便偏移由于反射光的倾斜或偏移引起的光量差异并输出所需信号的电路。因此，不管反射光的光学偏移或倾斜如何，仅输出原始聚焦误差信号，从而防止光学拾取器的故障，并且能够进行清洁的记录和再现。

18. 发明授权

US5587976A Optical pickup for optical magnetic disc 失效
标题翻译：光磁盘光拾取器
公开(公告)号：US5587976A
公开(公告)日：1996-12-24
申请号：US555967
申请日：1995-11-13
申请人： Jang-hoon Yoo , Kyung-hwa Rim , Chong-sam Chung , Chul-woo Lee
发明人： Jang-hoon Yoo , Kyung-hwa Rim , Chong-sam Chung , Chul-woo Lee
IPC分类号： G11B11/10 , G11B5/00 , G11B5/012 , G11B5/35 , G11B5/596 , G11B7/12 , G11B11/105 , G11B7/00
CPC分类号： G11B11/10543 , G11B5/00 , G11B5/012 , G11B5/35 , G11B5/596
摘要： An optical pickup for an optical magnetic disc includes a light source, a grating for diffracting the light into a main light beam and auxiliary light beams, a plurality of magnetic dipole tips arranged above the optical magnetic disc so as to interact with the magnetic signal stored in the optical magnetic disc. Also, a plurality of mirror members each attached to the rear of each magnetic dipole tips are for reflecting the light incident on the mirror member, and a photodetector for detecting track errors and the stored information by receiving the light reflected from the mirror members are provided, thereby detecting the error signal and reproducing information by the interaction with the magnetic dipoles of the disc so that the recording density can be increased without increasing the conventional land and groove areas in the disc.
摘要翻译：一种用于光磁盘的光拾取器包括光源，用于将光衍射成主光束的光栅和辅助光束，布置在光磁盘上方的多个磁偶极子尖端，以便与存储的磁信号相互作用在光磁盘中。此外，各个安装在每个磁偶极头的后面的多个镜构件用于反射入射在镜构件上的光，并且设置用于检测轨道错误的光电检测器和通过接收从镜构件反射的光的存储信息从而通过与盘的磁偶极子的相互作用来检测误差信号和再现信息，从而可以增加记录密度，而不增加盘中常规的平台和凹槽区域。

19. 发明授权

US5537384A Focus error detector 失效
标题翻译：聚焦误差检测器
公开(公告)号：US5537384A
公开(公告)日：1996-07-16
申请号：US364983
申请日：1994-12-28
申请人： Chul-woo Lee , Chong-sam Chung , Jan-hoon Yoo , Kyung-hwa Rim
发明人： Chul-woo Lee , Chong-sam Chung , Jan-hoon Yoo , Kyung-hwa Rim
IPC分类号： G11B7/09 , G11B7/095 , G11B7/135 , G11B7/00
CPC分类号： G11B7/1356 , G11B7/0912 , G11B7/095
摘要： A focus error detector for detecting a focus error of an objective lens with respect to an optical disk. The focus error detector includes a beam splitter for splitting light reflected from the optical disk. Two critical angle prisms having critical angle reflecting surfaces are included for respectively reflecting the light rays from the beam splitter at the respective critical angles onto two bisectional photo-detectors. The bisectional photo-detector generates detecting signals responsive to the amount of light received. The detecting signals are differentiated and added in a direction offsetting a shift or tilt of the reflected light. Accordingly, only the focus error signal is detected, irrespective of the tilt and shift of the optical axis of the reflected light. Thus, malfunction of an optical pickup is prevented, thereby providing for the uncorrupted recording and reproduction of data.
摘要翻译：一种用于检测物镜相对于光盘的聚焦误差的聚焦误差检测器。聚焦误差检测器包括用于分离从光盘反射的光的分束器。包括具有临界角反射表面的两个临界角棱镜，用于分别将来自分束器的光线以各自的临界角反射到两个二分光电检测器上。二分光电检测器响应于所接收的光量产生检测信号。检测信号在偏移反射光的偏移或倾斜的方向上被微分并相加。因此，不管反射光的光轴的倾斜和偏移如何，仅检测聚焦误差信号。因此，防止了光学拾取器的故障，由此提供数据的不良记录和再现。

20. 发明授权

US07079471B1 OPTICAL PICKUP USING TWO LASER BEAM SOURCES OF DIFFERENT WAVELENGTHS FOR AN OPTICAL DISK DRIVE AND A CONVERTER TO OPTIMIZE A LIGHT BEAM REFLECTED OFF AN OPTICAL DISC FOR DETECTION BASED ON REFLECTED LIGHT BEAM WAVELENGTH 失效
标题翻译：光学拾取使用两个不同波长的激光束光源，用于光盘驱动器和转换器，以根据反射的光束波长优化用于检测光源的光束。
公开(公告)号：US07079471B1
公开(公告)日：2006-07-18
申请号：US09442095
申请日：1999-11-17
申请人： Chong-sam Chung , Chul-woo Lee , In-sik Park
发明人： Chong-sam Chung , Chul-woo Lee , In-sik Park
IPC分类号： G11B7/135
CPC分类号： G11B7/1376 , G11B7/1353 , G11B2007/0006
摘要： First and second laser beam sources generate first and second laser beams of different wavelengths, respectively. A first collimating lens diverges the first laser beam at a predetermined angle so as to permit a fracture surface aberration of the first laser beam to fall below a predetermined value when the first laser beam generated from the first laser beam source is collected on the signal layer of the optical disk. A light receiving lens collects the laser beam reflected from the signal layer of the optical disk on a photo diode in the form of an optical spot of a predetermined size. A holographic lens has a pattern by which the first laser beam is converted into parallel rays so that the size of a spot of the first laser beam becomes identical with the size of a spot of the second laser beam as projected on the detecting section. The pattern of the holographic lens has a concentric annular concave-convex portion in which a plurality of annular prominences and depressions are arranged, and the depression and the prominence have a width which is gradually decreased from a center toward a most outer circumference of the concentric annular concave-convex portion. Further, an inner surface of each prominence has a step-like shape formed with at least one step. Preferably, the number of the step ranges from three to five. Accordingly, diameters of the optical spots of the two laser beams of different wavelengths are almost identical when the laser beams are transmitted through the holographic lens so that the optical spots are formed on the photo diode. As a result, with one objective lens and photo diode, information of two types of optical disks for laser beams of different wave lengths can be reproduced.
摘要翻译：第一和第二激光束源分别产生不同波长的第一和第二激光束。第一准直透镜将第一激光束以预定角度分开，以便当从第一激光束源产生的第一激光束收集在信号层上时，允许第一激光束的断裂表面像差降至预定值以下的光盘。光接收透镜以预定尺寸的光点的形式收集从光盘的信号层反射的光电二极管上的激光束。全息透镜具有将第一激光束转换为平行光线的图案，使得第一激光束的光斑的尺寸与投影在检测部上的第二激光束的光斑尺寸相同。全息透镜的图案具有同心环状的凹凸部，在该同心环状的凹凸部中配置有多个环状突起和凹部，凹部和凸部的宽度从同心的中心向最外周逐渐减小环形凹凸部。此外，每个凸起的内表面具有形成有至少一个台阶的台阶状。优选地，步数为3至5。因此，当激光束透射通过全息透镜时，两个不同波长的激光束的光点的直径几乎相同，使得光斑形成在光电二极管上。结果，利用一个物镜和光电二极管，可以再现不同波长的激光束的两种类型的光盘的信息。

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