公开(公告)号：US20050122862A1

公开(公告)日：2005-06-09

申请号：US10920106

申请日：2004-08-17

申请人： Dong-Ik Shin ,  Won-Jae Hwang ,  Chon-Su Kyong ,  Sung-Kyun Park ,  Ho-Cheol Lee ,  Ho-Seop Jeong

发明人： Dong-Ik Shin ,  Won-Jae Hwang ,  Chon-Su Kyong ,  Sung-Kyun Park ,  Ho-Cheol Lee ,  Ho-Seop Jeong

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1353

CPC分类号： G11B7/1353 ,  G11B7/0903 ,  G11B2007/0006

摘要： A tracking servo control apparatus and method in which the distance between a main beam and a side beam is adjustable by a rotatable grating, so as to perform a tracking servo control operation in accordance with a differential push-pull (DPP) method for both the DVD-ROM (Read Only Memory) and the DVD-RAM (Random Access Memory) having different track pitches.

摘要翻译： 一种跟踪伺服控制装置和方法，其中主光束和侧光束之间的距离可由可旋转光栅调节，以便根据差分推挽（DPP）方法执行跟踪伺服控制操作， DVD-ROM（只读存储器）和具有不同轨道间距的DVD-RAM（随机存取存储器）。

公开(公告)号：US20050195705A1

公开(公告)日：2005-09-08

申请号：US10910695

申请日：2004-08-02

申请人： Dong-ik Shin ,  Won-Jae Hwang ,  Chon-Su Kyong

发明人： Dong-ik Shin ,  Won-Jae Hwang ,  Chon-Su Kyong

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/131 ,  G11B7/135 ,  G11B7/1353

CPC分类号： G11B7/0903 ,  G11B7/00718 ,  G11B7/0908 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/24079 ,  G11B2007/0006

摘要： The optical pickup device includes a light emitting unit for emitting a light beam focused on an optical disc having different track pitches; an optical unit for focusing the light beam emitted from the light emitting unit on the optical disc, dividing the light beam reflected from the optical disc into a plurality of diffractive light beams, and transmitting the diffractive light beams to the outside; and a light receiving unit for receiving the diffractive light beams from the optical unit to calculate a focusing error signal and a tracking error signal.

摘要翻译： 光拾取装置包括用于发射聚焦在具有不同轨道间距的光盘上的光束的发光单元; 用于将从发光单元发射的光束聚焦在光盘上的光学单元，将从光盘反射的光束分成多个衍射光束，并将衍射光束传输到外部; 以及光接收单元，用于接收来自光学单元的衍射光束，以计算聚焦误差信号和跟踪误差信号。

公开(公告)号：US20050226106A1

公开(公告)日：2005-10-13

申请号：US10896618

申请日：2004-07-22

申请人： Won-Jae Hwang ,  Ho-Seop Jeong ,  Dong-ik Shin

发明人： Won-Jae Hwang ,  Ho-Seop Jeong ,  Dong-ik Shin

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/007 ,  G11B7/13 ,  G11B7/135

CPC分类号： G11B7/131 ,  G11B7/00718 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/0943

摘要： The optical pickup apparatus includes a light emitting means, an optical means, and an optical detection means. The light emitting means emits a single beam. The optical means diffracts the single beam, focuses the optical spot of the diffracted beam on a track, and transmits the diffracted beam to an outside. The optical detection means includes a first optical detection unit on which a central beam having a 0-order diffraction coefficient is focused, and second and third optical detection units on which side beams having ±1 diffraction coefficients are focused, respectively. Each optical detection unit is segmented into a specific number of optical detection areas, and at least one of the optical detection units is provided with an optical detection area on which a tracking error signal used to compensate for tracking offset attributable to optical axis offset of an objective lens is not formed.

摘要翻译： 光学拾取装置包括发光装置，光学装置和光学检测装置。 发光装置发射单个光束。 光学装置衍射单个光束，将衍射光束的光点聚焦在轨道上，并将衍射光束传输到外部。 光检测装置包括：第一光学检测单元，其上聚焦有0级衍射系数的中心束;以及分别具有±1个衍射系数的侧光束聚焦的第二和第三光学检测单元。 每个光学检测单元被分割成特定数量的光学检测区域，并且至少一个光学检测单元设置有光学检测区域，在该检测区域上用于补偿归因于光学偏移的光轴偏移的跟踪偏移 物镜没有形成。

公开(公告)号：US07298676B2

公开(公告)日：2007-11-20

申请号：US10896618

申请日：2004-07-22

申请人： Won-Jae Hwang ,  Ho-Seop Jeong ,  Dong-ik Shin

发明人： Won-Jae Hwang ,  Ho-Seop Jeong ,  Dong-ik Shin

IPC分类号： G11G7/00

CPC分类号： G11B7/131 ,  G11B7/00718 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/0943

摘要： The optical pickup apparatus includes a light emitting means, an optical means, and an optical detection means. The light emitting means emits a single beam. The optical means diffracts the single beam, focuses the optical spot of the diffracted beam on a track, and transmits the diffracted beam to an outside. The optical detection means includes a first optical detection unit on which a central beam having a 0-order diffraction coefficient is focused, and second and third optical detection units on which side beams having ±1 diffraction coefficients are focused, respectively. Each optical detection unit is segmented into a specific number of optical detection areas, and at least one of the optical detection units is provided with an optical detection area on which a tracking error signal used to compensate for tracking offset attributable to optical axis offset of an objective lens is not formed.

摘要翻译： 光学拾取装置包括发光装置，光学装置和光学检测装置。 发光装置发射单个光束。 光学装置衍射单个光束，将衍射光束的光点聚焦在轨道上，并将衍射光束传输到外部。 光检测装置包括：第一光学检测单元，其上聚焦有0级衍射系数的中心束;以及分别具有±1个衍射系数的侧光束聚焦的第二和第三光学检测单元。 每个光学检测单元被分割成特定数量的光学检测区域，并且至少一个光学检测单元设置有光学检测区域，在该检测区域上用于补偿归因于光学偏移的光轴偏移的跟踪偏移 物镜没有形成。

公开(公告)号：US20050195706A1

公开(公告)日：2005-09-08

申请号：US10912813

申请日：2004-08-06

申请人： Won-Jae Hwang

发明人： Won-Jae Hwang

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/12 ,  G11B7/131 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/1381

CPC分类号： G11B7/0901 ,  G11B7/0908 ,  G11B7/0943 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1381 ,  G11B7/24079 ,  G11B2007/0006

摘要： Disclosed herein is an optical pickup device for optical disks having different track pitches. The optical pickup device performs tracking servo follow-up using the diffraction patterns of the side regions of a beam reflected and diffracted from an optical disk where a tracking error offset attributable to the left or right shift of an object lens is minimized, and performs focus servo follow-up using the diffraction pattern of a center region of the diffracted beam. Accordingly, the present invention performs tracking servo follow-up using the diffraction patterns of the side regions of a light distribution, in which a tracking error offset attributable to the left or right shift of an object lens is minimized, so that the present invention has an effect in that a correct FES/TES for optical disks having different track pitches can be detected.

摘要翻译： 本文公开了一种具有不同轨道间距的光盘的光学拾取装置。 光学拾取装置使用从光学镜反射和衍射的光束的侧面区域的衍射图案进行跟踪伺服跟踪，其中由于物镜的左右偏移引起的跟踪误差偏移最小化，并且进行聚焦 使用衍射光束的中心区域的衍射图案进行伺服跟踪。 因此，本发明使用由于物镜的左右偏移引起的跟踪误差偏移最小化的光分布的侧面区域的衍射图案进行跟踪伺服跟踪，从而本发明具有 可以检测到具有不同轨道间距的光盘的正确FES / TES的效果。

公开(公告)号：US5369631A

公开(公告)日：1994-11-29

申请号：US963672

申请日：1992-10-20

申请人： Won-Jae Hwang

发明人： Won-Jae Hwang

IPC分类号： G11B7/00 ,  G11B7/003 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/135 ,  G11B25/06

CPC分类号： G11B7/003

摘要： A recording/reproducing apparatus for an optical tape for optically recording and reproducing information on an optical tape having a thermal converting layer. An optical pickup is divided into two separate parts, one for recording and the other for reproducing, and has an erasing device for optically erasing with the optical pickup for reproducing. The optical pickup for reproducing has a collimating lens for collimating the divergent light beam of a laser diode for reproducing or erasing the information group recorded on at least one track of the optical tape at the same time, a cylindrical lens for focussing the collimated light beam in the vertical direction, and a photodiode array for detecting light reflected from the tape. Also, the optical pickup for reproducing employs an aperture having a square hole for effectively focussing the light beam.

摘要翻译： 一种用于在具有热转换层的光带上光学记录和再现信息的光带的记录/再现装置。 光拾取器被分成两个单独的部分，一个用于记录，另一个用于再现，并且具有用于光学擦除的擦除装置，用于再现。 用于再现的光学拾取器具有用于准直激光二极管的发散光束的准直透镜，用于同时再现或擦除记录在光带的至少一个轨道上的信息组;柱面透镜，用于聚焦准直光束 以及用于检测从该带反射的光的光电二极管阵列。 此外，用于再现的光学拾取器采用具有用于有效聚焦光束的方孔的孔。