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1. 发明申请

WO03079338A2 CONTROL METHOD FOR FOCUS AND TRACKING IN PICKUP APPARATUS 审中-公开
标题翻译：控制方法用于抓拍设备中的焦点和跟踪
公开(公告)号：WO03079338A2
公开(公告)日：2003-09-25
申请号：PCT/JP0303356
申请日：2003-03-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHINAKA HIDEKI , HORINOUCHI SHOGO , ISHIBASHI SHIN , FURUKAWA FUMINOBU
IPC分类号： G11B7/09 , G11B7/12 , G11B7/135 , G11B7/22 , G11B11/105
CPC分类号： G11B7/1381 , G11B7/0901 , G11B7/0912 , G11B7/094 , G11B7/122 , G11B7/123 , G11B7/1353 , G11B7/1365 , G11B7/22 , G11B11/10543
摘要： Provided is a focus and tracking control method for an optical pick-up apparatus which is used for recording and reproduction of a small-sized optical disc and which can carry out stable focus control and stable tracking control. A focus control method for an optical pick-up apparatus comprising a light source, an objective lens, a light receiving means having divided four light receiving zones and a polarizing means having divided for lattice zones, characterized in that when the reflected light beam is incident upon the four light receiving zones by way of the four lattice zones, focus control is carried out in accordance with a difference signal between the groups, in the radial direction, of the four light receiving zones which are divided into two groups in the radial direction by the division line in parallel with the tangential direction, respectively through the four lattice zones which are divided into two groups in the tangential direction by a division line in parallel with the radial direction. Further, the tracking control for the pick-up apparatus is characterized in that tracking control is carried out in accordance with a difference signal between two groups in the tangential direction.
摘要翻译：提供了一种用于光学拾取装置的聚焦和跟踪控制方法，其用于小型光盘的记录和再现，并且其可以执行稳定的聚焦控制和稳定的跟踪控制。一种用于光学拾取装置的聚焦控制方法，包括光源，物镜，具有分开的四个光接收区域的光接收装置和用于格栅区域的偏振装置，其特征在于，当反射光束入射时在通过四个格栅区域的四个光接收区域之间，根据在径向方向上分成两组的四个光接收区域的组之间的差分信号进行聚焦控制通过与切线方向平行的分割线，分别通过与径向平行的分割线沿切线方向分成两组的四个格子区。此外，拾取装置的跟踪控制的特征在于，根据沿切线方向的两组之间的差分信号执行跟踪控制。

2. 发明专利

DE69732471D1 未知
公开(公告)号：DE69732471D1
公开(公告)日：2005-03-17
申请号：DE69732471
申请日：1997-12-15
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOJIMA KOUKI , FURUKAWA FUMINOBU
IPC分类号： G11B7/00 , G11B7/12 , G11B7/135 , G11B7/125
摘要： The present invention has an object to provide a light pickup capable of recording or reproducing information from optical disks having different recording densities. The light pickup comprises a first optical unit 4 comprising a light source which emits rays having a first wavelength for DVDs and a first light sensor which detects reflected rays, a second optical unit 8 comprising a light source which emits rays having a second wavelength for CDs and a second light sensor which detects reflected rays, a beam splitter 10 which directs the rays having the first wavelength and the rays having the second wavelength along substantially the same optical axis, and directs reflected rays from an optical disk to the first light sensor and the second light sensor, and an objective lens 16 which has a numerical aperture (NA) of 0.6 or more, a focal length of 2.5 mm or less, an effective diameter of incidence of 3.0 mm or less and a working distance of 1.2 mm or less. The light pickup as a whole has a thickness of 7.5 mm or less as measured from a bottom surface of the optical disk. The light pickup is capable of reproducing optical disks having different recording densities, composed of a small number of parts, compact and thin.

3. 发明专利

DE69723033D1 未知
公开(公告)号：DE69723033D1
公开(公告)日：2003-07-31
申请号：DE69723033
申请日：1997-07-03
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI , NAKASHIMA KAZUYUKI , KOJIMA KOUKI , FURUKAWA FUMINOBU
IPC分类号： G11B7/09 , G11B7/00 , G11B7/123 , G11B7/125 , G11B7/1275 , G11B7/135 , G11B7/1353 , G11B7/1362 , G11B7/1365 , G11B7/1374 , G11B7/139 , G11B7/12
摘要： An optical pickup is capable of recording on and reproduction from recording media of different recording densities, and has a compact, thin and of low power-consumption design. The optical pickup, which is capable of recording on and reproduction from a high-density optical disk (17) and a low-density optical disk, includes an objective lens (16), a first optical unit (4) having a light-emitting element and a light-receiving element which are used for recording on and reproduction from the high-density optical disk, a second optical unit (8) having a light-emitting element and a light-receiving element which are used for recording on and reproduction from the low-density optical disk, a beam splitter (10) for guiding optical axes of the first and second optical units to the same optical axis, and a wavelength filter (15) for changing a diameter of light beams incident on the objective lens between at the time of recording and reproduction for the high-density optical disk and at the time of recording and reproduction for the low-density optical disk.

4. 发明专利

AU2003214652A8 Control method for focus and tracking in pickup apparatus 未知
公开(公告)号：AU2003214652A8
公开(公告)日：2003-09-29
申请号：AU2003214652
申请日：2003-03-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHINAKA HIDEKI , ISHIBASHI SHIN , HORINOUCHI SHOGO , FURUKAWA FUMINOBU
IPC分类号： G11B7/09 , G11B7/12 , G11B7/135 , G11B7/22 , G11B11/105 , G11B7/00
摘要： Provided is a focus and tracking control method for an optical pick-up apparatus which is used for recording and reproduction of a small-sized optical disc and which can carry out stable focus control and stable tracking control. A focus control method for an optical pick-up apparatus comprising a light source, an objective lens, a light receiving means having divided four light receiving zones and a polarizing means having divided for lattice zones, characterized in that when the reflected light beam is incident upon the four light receiving zones by way of the four lattice zones, focus control is carried out in accordance with a difference signal between the groups, in the radial direction, of the four light receiving zones which are divided into two groups in the radial direction by the division line in parallel with the tangential direction, respectively through the four lattice zones which are divided into two groups in the tangential direction by a division line in parallel with the radial direction. Further, the tracking control for the pick-up apparatus is characterized in that tracking control is carried out in accordance with a difference signal between two groups in the tangential direction.

5. 发明专利

DE69723033T2 未知
公开(公告)号：DE69723033T2
公开(公告)日：2004-05-06
申请号：DE69723033
申请日：1997-07-03
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI , NAKASHIMA KAZUYUKI , KOJIMA KOUKI , FURUKAWA FUMINOBU
IPC分类号： G11B7/09 , G11B7/00 , G11B7/123 , G11B7/125 , G11B7/1275 , G11B7/135 , G11B7/1353 , G11B7/1362 , G11B7/1365 , G11B7/1374 , G11B7/139 , G11B7/12
摘要： An optical pickup is capable of recording on and reproduction from recording media of different recording densities, and has a compact, thin and of low power-consumption design. The optical pickup, which is capable of recording on and reproduction from a high-density optical disk (17) and a low-density optical disk, includes an objective lens (16), a first optical unit (4) having a light-emitting element and a light-receiving element which are used for recording on and reproduction from the high-density optical disk, a second optical unit (8) having a light-emitting element and a light-receiving element which are used for recording on and reproduction from the low-density optical disk, a beam splitter (10) for guiding optical axes of the first and second optical units to the same optical axis, and a wavelength filter (15) for changing a diameter of light beams incident on the objective lens between at the time of recording and reproduction for the high-density optical disk and at the time of recording and reproduction for the low-density optical disk.

6. 发明专利

AU2003214652A1 CONTROL METHOD FOR FOCUS AND TRACKING IN PICKUP APPARATUS 未知
公开(公告)号：AU2003214652A1
公开(公告)日：2003-09-29
申请号：AU2003214652
申请日：2003-03-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHINAKA HIDEKI , HORINOUCHI SHOGO , ISHIBASHI SHIN , FURUKAWA FUMINOBU
IPC分类号： G11B7/09 , G11B7/12 , G11B7/135 , G11B7/22 , G11B11/105
摘要： Provided is a focus and tracking control method for an optical pick-up apparatus which is used for recording and reproduction of a small-sized optical disc and which can carry out stable focus control and stable tracking control. A focus control method for an optical pick-up apparatus comprising a light source, an objective lens, a light receiving means having divided four light receiving zones and a polarizing means having divided for lattice zones, characterized in that when the reflected light beam is incident upon the four light receiving zones by way of the four lattice zones, focus control is carried out in accordance with a difference signal between the groups, in the radial direction, of the four light receiving zones which are divided into two groups in the radial direction by the division line in parallel with the tangential direction, respectively through the four lattice zones which are divided into two groups in the tangential direction by a division line in parallel with the radial direction. Further, the tracking control for the pick-up apparatus is characterized in that tracking control is carried out in accordance with a difference signal between two groups in the tangential direction.

7. 发明专利

DE69732471T2 未知
公开(公告)号：DE69732471T2
公开(公告)日：2006-04-27
申请号：DE69732471
申请日：1997-12-15
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： KOJIMA KOUKI , FURUKAWA FUMINOBU
IPC分类号： G11B7/00 , G11B7/12 , G11B7/135
摘要： The present invention has an object to provide a light pickup capable of recording or reproducing information from optical disks having different recording densities. The light pickup comprises a first optical unit 4 comprising a light source which emits rays having a first wavelength for DVDs and a first light sensor which detects reflected rays, a second optical unit 8 comprising a light source which emits rays having a second wavelength for CDs and a second light sensor which detects reflected rays, a beam splitter 10 which directs the rays having the first wavelength and the rays having the second wavelength along substantially the same optical axis, and directs reflected rays from an optical disk to the first light sensor and the second light sensor, and an objective lens 16 which has a numerical aperture (NA) of 0.6 or more, a focal length of 2.5 mm or less, an effective diameter of incidence of 3.0 mm or less and a working distance of 1.2 mm or less. The light pickup as a whole has a thickness of 7.5 mm or less as measured from a bottom surface of the optical disk. The light pickup is capable of reproducing optical disks having different recording densities, composed of a small number of parts, compact and thin.

8. 发明专利

AU2002347630A1 OPTICAL PICKUP APPARATUS FOR SMALL OPTICAL DISK 未知
公开(公告)号：AU2002347630A1
公开(公告)日：2003-06-10
申请号：AU2002347630
申请日：2002-11-21
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HORINOUCHI SHOGO , YOSHINAKA HIDEKI , ISHIBASHI SHIN , FURUKAWA FUMINOBU
IPC分类号： G11B7/135 , G11B7/00 , G11B7/085 , G11B7/12 , G11B7/123 , G11B7/22

9. 发明专利

MY115096A OPTICAL PICKUP 未知
公开(公告)号：MY115096A
公开(公告)日：2003-03-31
申请号：MYPI9702853
申请日：1997-06-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： HARUGUCHI TAKASHI , KOJIMA KOUKI , NAKASHIMA KAZUYUKI , FURUKAWA FUMINOBU
IPC分类号： G11B7/09 , G11B7/12 , G11B7/00 , G11B7/123 , G11B7/125 , G11B7/1275 , G11B7/135 , G11B7/1353 , G11B7/1362 , G11B7/1365 , G11B7/1374 , G11B7/139
摘要： AN OPTICAL PICKUP FOR RECORDING ON AND REPRODUCTION FROM RECORDING MEDIA OF DIFFERENT RECORDING DENSITIES (E.G. A HIGH DENSITY DISK SUCH AS A DVD AND A LOWER DENSITY DISK SUCH AS AN ORDINARY CD), AND HAVING A COMPACT, THIN AND LOW POWER-CONSUMPTION DESIGN. THE OPTICAL PICKUP INCLUDES AN OBJECTIVE LENS (16), A FIRST OPTICAL UNIT (4) HAVING A LIGHT-EMITTING ELEMENT (2) AND A LIGHT-RECEIVING ELEMENT (3) WHICH ARE USED FOR RECORDING, ON AND REPRODUCTION FROM THE HIGH- DENSITY OPTICAL DISK, A SECOND OPTICAL UNIT (8) HAVING A LIGHT-EMITTING ELEMENT (6) AND A LIGHT-RECEIVING ELEMENT (7) WHICH ARE USED FOR RECORDING ON AND REPRODUCTION FROM THE LOW-DENSITY OPTICAL DISK, A BEAM SPLITTER (10) FOR GUIDING OPTICAL AXES OF THE FIRST AND SECOND OPTICAL UNITS (4,8) TO THE SAME OPTICAL AXIS, AND A WAVELENGTH FILTER (15) FOR CHANGING A DIAMETER OF LIGHT BEAMS INCIDENT ON THE OBJECTIVE LENS (16) BETWEEN AT THE TIME OF RECORDING AND REPRODUCTION FOR THE HIGH-DENSITY OPTICAL DISK AND AT THE TIME OF RECORDING AND REPRODUCTION FOR THE LOW-DENSITY OPTICAL DISK.(FIG 1)

10. 发明专利

JP2002175634A INTEGRATED OPTICAL MEMBER AND OPTICAL PICKUP DEVICE 审中-公开
公开(公告)号：JP2002175634A
公开(公告)日：2002-06-21
申请号：JP2001266991
申请日：2001-09-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： FUKAKUSA MASAHARU , HORINOUCHI SHOGO , GOTO HIROSHI , FURUKAWA FUMINOBU , ONO EIZO , MITSUMASA JIROU , KOGA TOSHIHIRO
IPC分类号： G02B5/18 , G11B7/09 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an integrated optical member and an optical pickup device that prevent a detecting optical system from being affected by the change in temperature to use. SOLUTION: The integrated optical member 20 is such that it guides the emitted light flux of a laser element to an optical disk and that it separates a required light flux among reflected light beams from the optical disk. The member 20 contains a plurality of optical surfaces inside and is characterized by forming a third diffraction grating 40 that extracts the light flux required for tracking control and focusing control from he reflected light beams on a first inclined surface 36. In addition to this integrated optical member 20, an optical pickup device using this member and an optical disk apparatus using this optical pickup device are provided.

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