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1. 发明公开

EP1460623A4 OPTICAL PICKUP APPARATUS 有权
标题翻译：光学装置客户服务
公开(公告)号：EP1460623A4
公开(公告)日：2008-05-28
申请号：EP02805473
申请日：2002-12-18
申请人： SONY CORP
发明人： KOBAYASHI TAKASHI
IPC分类号： G11B7/09 , G01C3/08 , G11B7/08 , G11B7/131 , G11B7/1353
CPC分类号： G11B7/0912 , G11B7/13 , G11B7/131 , G11B7/133 , G11B7/1353 , G11B7/1381
摘要： An optical pickup apparatus for detecting an S-shaped signal of preferable symmetry and acquiring a focus error signal by the SSD method for stabilization of operation. A laser beam is applied to an optical recording medium and at least reflected light from the optical recording medium is introduced via a diffraction element to a photo detector unit. A focus error signal detection is performed by a spot size detection method using the diffraction light generated by the diffraction element. The photo detector unit is located at a position offset to the side of the diffraction element from the focal point position of 0-th degree light which has passed through the diffraction element.

2. 发明专利

DE69923919D1 未知
公开(公告)号：DE69923919D1
公开(公告)日：2005-04-07
申请号：DE69923919
申请日：1999-11-19
申请人： SONY CORP
发明人： ASANO TAKEHARU , ASATSUMA TSUNENORI , HINO TOMONORI , TOMIYA SHIGETAKA , YAMAGUCHI TAKASHI , KOBAYASHI TAKASHI
IPC分类号： H01S5/00 , H01S5/22 , H01S5/223 , H01S5/227 , H01S5/30 , H01S5/323 , H01S5/343 , H01L33/00
摘要： In a semiconductor laser made of nitride III-V compound semiconductors and having a ridge-shaped stripe, which is capable of stably controlling transverse modes to prevent high-order mode oscillation during high output power and excellent in heat dissipation, opposite sides of the ridge are buried by a buried semiconductor layer such as AlGaN buried layer made of a nitride III-V compound semiconductor at least of which is a non-single crystal such as polycrystal. The buried semiconductor layer is grown under a growth temperature in the range from 520 DEG C to 760 DEG C.

3. 发明专利

DE60234274D1 未知
公开(公告)号：DE60234274D1
公开(公告)日：2009-12-17
申请号：DE60234274
申请日：2002-12-18
申请人： SONY CORP
发明人： KOBAYASHI TAKASHI
IPC分类号： G11B7/09 , G01C3/08 , G11B7/08 , G11B7/131 , G11B7/1353
摘要： An optical pickup apparatus for detecting a symmetric S-shaped signal to obtain a focus-error signal by an SSD method for stability in operation is provided. In an optical pickup apparatus for irradiating laser light onto an optical recording medium and for directing the light reflected from at least the optical recording medium to a light-receiving device section through a diffraction element to detect a focus-error signal by a spot size detection method using diffracted light caused by the diffraction element, the position of the light-receiving device section is set to the position offset closer to the diffraction element from the focal position of the 0 order light passing through the diffraction element.

4. 发明专利

DE69923919T2 未知
公开(公告)号：DE69923919T2
公开(公告)日：2006-04-06
申请号：DE69923919
申请日：1999-11-19
申请人： SONY CORP
发明人： ASANO TAKEHARU , ASATSUMA TSUNENORI , HINO TOMONORI , TOMIYA SHIGETAKA , YAMAGUCHI TAKASHI , KOBAYASHI TAKASHI
IPC分类号： H01S5/00 , H01S5/323 , H01S5/22 , H01S5/223 , H01S5/227 , H01S5/30 , H01S5/343
摘要： In a semiconductor laser made of nitride III-V compound semiconductors and having a ridge-shaped stripe, which is capable of stably controlling transverse modes to prevent high-order mode oscillation during high output power and excellent in heat dissipation, opposite sides of the ridge are buried by a buried semiconductor layer such as AlGaN buried layer made of a nitride III-V compound semiconductor at least of which is a non-single crystal such as polycrystal. The buried semiconductor layer is grown under a growth temperature in the range from 520 DEG C to 760 DEG C.

5. 发明专利

DE69926856T2 未知
公开(公告)号：DE69926856T2
公开(公告)日：2006-05-18
申请号：DE69926856
申请日：1999-11-25
申请人： SONY CORP
发明人： YAMAGUCHI TAKASHI , KOBAYASHI TOSHIMASA , KIJIMA SATORU , KOBAYASHI TAKASHI , ASATSUMA TSUNENORI , ASANO TAKEHARU , HINO TOMONORI
IPC分类号： H01S5/323 , H01L33/06 , H01L33/12 , H01L33/32 , H01S5/00 , H01S5/20 , H01S5/22 , H01S5/223 , H01S5/227 , H01S5/343
摘要： A GaN compound semiconductor laser includes an AlGaN buried layer which buries opposite sides of a ridge stripe portion formed on a p-type AlGaN cladding layer. The AlGaN buried layer is made by first patterning an upper part of the p-type AlGaN cladding layer and a p-type GaN contact layer into a ridge stripe configuration by using a SiO2 film as an etching mask, then growing the AlGaN buried layer non-selectively on the entire substrate surface to bury both sides of the ridge stripe portion under the existence of the SiO2 film on the ridge stripe portion, and thereafter selectively removing the AlGaN buried layer from above the ridge stripe portion by etching using the SiO2 film as an etching stop layer. Thus, the GaN compound semiconductor laser is stabilized in the transverse mode, intensified in output power, and improved in lifetime.

6. 发明专利

DE69926856D1 未知
公开(公告)号：DE69926856D1
公开(公告)日：2005-09-29
申请号：DE69926856
申请日：1999-11-25
申请人： SONY CORP
发明人： YAMAGUCHI TAKASHI , KOBAYASHI TOSHIMASA , KIJIMA SATORU , KOBAYASHI TAKASHI , ASATSUMA TSUNENORI , ASANO TAKEHARU , HINO TOMONORI
IPC分类号： H01L33/06 , H01L33/12 , H01L33/32 , H01S5/00 , H01S5/20 , H01S5/22 , H01S5/223 , H01S5/227 , H01S5/323 , H01S5/343 , H01L33/00
摘要： A GaN compound semiconductor laser includes an AlGaN buried layer which buries opposite sides of a ridge stripe portion formed on a p-type AlGaN cladding layer. The AlGaN buried layer is made by first patterning an upper part of the p-type AlGaN cladding layer and a p-type GaN contact layer into a ridge stripe configuration by using a SiO2 film as an etching mask, then growing the AlGaN buried layer non-selectively on the entire substrate surface to bury both sides of the ridge stripe portion under the existence of the SiO2 film on the ridge stripe portion, and thereafter selectively removing the AlGaN buried layer from above the ridge stripe portion by etching using the SiO2 film as an etching stop layer. Thus, the GaN compound semiconductor laser is stabilized in the transverse mode, intensified in output power, and improved in lifetime.

7. 发明专利

JP2010146608A Optical integrated device, method for detecting light, optical pickup, and optical disc apparatus 有权
标题翻译：光学集成装置，用于检测光，光学拾取和光盘装置的方法
公开(公告)号：JP2010146608A
公开(公告)日：2010-07-01
申请号：JP2008319903
申请日：2008-12-16
申请人： Sony Corp , ソニー株式会社
发明人： KOBAYASHI TAKASHI , SEO KATSUHIRO , YOSHIDA TAKAYUKI
IPC分类号： G11B7/135 , G11B7/09 , G11B7/13
摘要： PROBLEM TO BE SOLVED: To generate a detection signal capable of performing highly accurate servo control. SOLUTION: In the optical disk apparatus 1, a detection signal U including no offset component can be formed in an optical detection part 52 though lengths in a tangential direction of spots T3CP and T3CQ is different from each other in a focused state of a light beam L1C in the case of a CD system since the ratio of the lengths in the tangential direction is made equal to the ratio of the sizes of the spots in a region 52CP of a photodetector 52W and a region 52CQ of a photodetector 52Z in the optical detection part 52. Thereby, a focus error signal SFE of high quality in which a focus shift amount is reflected can be formed by a signal processing part 13 in either case of a DVD system and the CD system and highly accurate focus control can be performed. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：产生能够执行高精度伺服控制的检测信号。解决方案：在光盘装置1中，可以在光学检测部件52中形成不包括偏移分量的检测信号U，尽管在点聚合状态下，斑点T3CP和T3CQ的切线方向上的长度彼此不同在CD系统的情况下的光束L1C，因为切线方向上的长度的比率被设定为等于光电检测器52W的区域52CP中的光斑尺寸与光电检测器52Z的区域52CQ之间的比例由此，可以在DVD系统和CD系统的任一种情况下由信号处理部分13形成其中反射聚焦偏移量的高质量的聚焦误差信号SFE，并且高精度的聚焦控制可以被执行。版权所有（C）2010，JPO＆INPIT

8. 发明专利

JP2009043306A Optical pickup and optical disk drive 审中-公开
标题翻译：光学拾取和光盘驱动器
公开(公告)号：JP2009043306A
公开(公告)日：2009-02-26
申请号：JP2007204465
申请日：2007-08-06
申请人： Sony Corp , ソニー株式会社
发明人： TAKASE FUTOHIRO , SEO KATSUHIRO , OKAMOTO YOSHIKI , KOBAYASHI TAKASHI
IPC分类号： G11B7/135 , G11B7/09 , G11B7/13
摘要： PROBLEM TO BE SOLVED: To detect an amount of light of stray light OB between layers by sub-beam detectors 63 and 64 with a high degree of accuracy. SOLUTION: A straight line which is made inclined only by a tilt angle β from a tangential direction can be irradiated with a main beam MB and sub-beam SB on optical disk 100 by setting up a reference line SL in a diffraction grating DL in a state inclined only by a tilt angle β from a radial direction. In an optical disk drive 10, a main beam detector 62, and sub-beam detectors 63 and 64 in a photodetector 60 are arranged on a straight line which is made inclined only by the tilt angle β. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过子光束检测器63和64以高精度检测层之间的杂散光OB的光量。解决方案：通过在衍射光栅中设置参考线SL，可以用光束100上的主光束MB和子光束SB照射从切线方向倾斜到倾斜角β的直线 DL处于仅从径向倾斜角度β的状态。在光盘驱动器10中，光束检测器60中的主光束检测器62和子光束检测器63和64布置在仅由倾斜角β倾斜的直线上。版权所有（C）2009，JPO＆INPIT

9. 发明专利

JP2007265595A Optical pickup device and optical disk drive 有权
标题翻译：光学拾取器件和光盘驱动器
公开(公告)号：JP2007265595A
公开(公告)日：2007-10-11
申请号：JP2006329755
申请日：2006-12-06
申请人： Sony Corp , ソニー株式会社
发明人： KOBAYASHI TAKASHI , SEO KATSUHIRO , OKAMOTO YOSHIKI , KATO NORIYUKI
IPC分类号： G11B7/095 , G11B7/135
CPC分类号： G11B7/0901 , G11B7/123 , G11B7/131 , G11B7/1353 , G11B7/1381
摘要： PROBLEM TO BE SOLVED: To attain a stable servo control by a simple constitution. SOLUTION: The light receiving section of a light receiving section has such a constitution that two areas are arranged so as to divide a spot 180 in the tangential direction of a disk, and the spot 180 becomes the asymmetric shape with respect to a line segment parallel with a radial direction passing through the center of the spot 180 and also to a line segment parallel with the tangential direction passing through the center of the spot 180. Since the movement of the spot position of a light beam in the radial direction is revealed as the shape change of the spot formed on the light receiving section, a lens shift signal can be detected by computing the difference of signals output from the areas K and L of the light receiving section. This invention is applicable for an optical pickup. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：通过简单的结构实现稳定的伺服控制。解决方案：光接收部分的光接收部分具有这样的结构：两个区域被布置成在盘的切线方向上划分点180，并且点180相对于线段与通过光斑180的中心的径向方向平行，并且还与通过光斑180的中心的切线方向平行的线段平行。由于光束在径向上的光点位置的运动被揭示为形成在光接收部分上的光斑的形状变化，可以通过计算从光接收部分的区域K和L输出的信号的差异来检测透镜移位信号。本发明适用于光学拾取器。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2006351097A OPTICAL PICKUP DEVICE AND OPTICAL DISK DEVICE 审中-公开
公开(公告)号：JP2006351097A
公开(公告)日：2006-12-28
申请号：JP2005175293
申请日：2005-06-15
申请人： SONY CORP
发明人： KOBAYASHI TAKASHI , NISHI NORIAKI , NEMOTO KAZUHIKO
IPC分类号： G11B7/125 , G11B7/135
摘要： PROBLEM TO BE SOLVED: To provide an optical pickup device having stable performance and an optical disk device using the same. SOLUTION: The optical pickup device includes a light emitting element for emitting a laser beam, and a polarized beam splitter having characteristics of roughly fully transmitting the polarized light of a first direction and roughly fully reflecting the polarized light of a second direction orthogonal to the first direction and adapted to transmit a part of the laser beam thereby making it incident as an emitted laser beam on an optical disk and to reflect the remaining laser beam thereby making it incident as a monitored laser beam on a light receiving element. The light emitting element and the polarized beam splitter area arranged to include a predetermined angle difference between the polarizing direction of the laser beam made incident on the polarized beam splitter. Thus, by using the polarized beam splitter having stable characteristics to roughly fully transmitting the polarized light of the first direction and to roughly fully reflect the polarized beam of the second direction, the laser beam from the light emitting element is branched into two. COPYRIGHT: (C)2007,JPO&INPIT

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