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1. 发明授权

US06321028B1 Optical disk recording/reproduction apparatus for recording/reproducing information to/from optical disk of different standards 失效
标题翻译：用于向不同标准的光盘记录/再现信息的光盘记录/再现装置
公开(公告)号：US06321028B1
公开(公告)日：2001-11-20
申请号：US08661937
申请日：1996-06-11
申请人： Seiji Kajiyama , Yoichi Tsuchiya , Yasuyuki Kanou , Shuichi Ichiura , Hitotoshi Kimura , Toshio Harada , Yasuyuki Matsushita
发明人： Seiji Kajiyama , Yoichi Tsuchiya , Yasuyuki Kanou , Shuichi Ichiura , Hitotoshi Kimura , Toshio Harada , Yasuyuki Matsushita
IPC分类号： H04N585
CPC分类号： G11B7/1381 , G11B7/1369 , G11B7/139 , G11B2007/0006 , H04N5/85
摘要： An optical disk recording/reproduction apparatus includes a semiconductor laser, an objective lens provided opposite an optical disk, an optical system for supplying a laser beam from the semiconductor laser to the objective lens, an aperture for not intercepting the laser beam in reproducing from a digital video disk and intercepting an outermost portion of the laser beam in reproducing from a compact disk, and a tracking servo mechanism for moving the objective lens in a tracking direction orthogonal to the running direction of a track of the optical disk. The aperture has an oblong opening that is longer in the tracking direction than in the track running direction.
摘要翻译：光盘记录/再现装置包括半导体激光器，与光盘相对设置的物镜，用于将来自半导体激光器的激光束提供给物镜的光学系统，用于不从所述半导体激光器再现中截取激光束的孔径数字视频盘，并且从光盘再现时截获激光束的最外部分;以及跟踪伺服机构，用于沿着与光盘的轨道行进方向垂直的跟踪方向移动物镜。该孔具有在跟踪方向上比轨道运行方向更长的长方形开口。

2. 发明授权

US5917791A Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom 失效
标题翻译：用于鉴别彼此不同厚度的光学记录介质并再现信息的装置
公开(公告)号：US5917791A
公开(公告)日：1999-06-29
申请号：US689019
申请日：1996-07-30
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura , Koichi Tada , Masami Shimizu , Toshio Harada
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura , Koichi Tada , Masami Shimizu , Toshio Harada
IPC分类号： G11B7/00 , G11B7/09 , G11B7/12 , G11B19/12 , G11B3/90
CPC分类号： G11B19/12 , G11B7/12 , G11B2007/0006 , G11B7/0945
摘要： An apparatus for discriminating optical disks has an optical pickup provided with an objective lens having an effective numerical aperture of 0.55 to 0.65, which can compatibly reproduce information from a CD and an SD. The apparatus discriminates presence/absence of waveforms of two focus error signals detected when the effective numerical aperture of the objective lens is set at 0.55 to 0.65 and 0.20 to 0.45 respectively in a process of performing focus servo control, thereby discriminating various types of optical disks from each other. Thus, optical disks having different substrate thicknesses, different track pitches, different minimum pit lengths and different reflectivity can be quickly and simply discriminated from each other.
摘要翻译：用于识别光盘的装置具有设置有具有0.55至0.65的有效数值孔径的物镜的光学拾取器，其可以兼容地再现来自CD和SD的信息。当在执行聚焦伺服控制的过程中，当物镜的有效数值孔径分别设定为0.55至0.65和0.20至0.45时，所述装置鉴别出检测到的两个聚焦误差信号的波形的存在/不存在，从而区分各种类型的光盘从彼此。因此，可以快速且简单地区分具有不同衬底厚度，不同轨道间距，不同最小凹坑长度和不同反射率的光盘。

3. 发明授权

US06201777B1 Apparatus for discriminating optical recording media of different thicknesses from each other and reproducing information therefrom 有权
标题翻译：用于鉴别彼此不同厚度的光学记录介质并再现信息的装置
公开(公告)号：US06201777B1
公开(公告)日：2001-03-13
申请号：US09251448
申请日：1999-02-17
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura , Koichi Tada , Masami Shimizu , Toshio Harada
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura , Koichi Tada , Masami Shimizu , Toshio Harada
IPC分类号： G11B2010
CPC分类号： G11B19/12 , G11B7/0945 , G11B7/12 , G11B2007/0006
摘要： An apparatus for discriminating optical disks has an optical pickup provided with an objective lens having an effective numerical aperture of 0.55 to 0.65, which can compatibly reproduce information from a CD and an SD. The apparatus discriminates presence/absence of waveforms of two focus error signals detected when the effective numerical aperture of the objective lens is set at 0.55 to 0.65 and 0.20 to 0.45 respectively in a process of performing focus servo control, thereby discriminating various types of optical disks from each other. Thus, optical disks having different substrate thicknesses, different track pitches, different minimum pit lengths and different reflectivity can be quickly and simply discriminated from each other.
摘要翻译：用于识别光盘的装置具有设置有具有0.55至0.65的有效数值孔径的物镜的光学拾取器，其可以兼容地再现来自CD和SD的信息。当在执行聚焦伺服控制的过程中，当物镜的有效数值孔径分别设定为0.55至0.65和0.20至0.45时，所述装置鉴别出检测到的两个聚焦误差信号的波形的存在/不存在，从而区分各种类型的光盘从彼此。因此，可以快速且简单地区分具有不同衬底厚度，不同轨道间距，不同最小凹坑长度和不同反射率的光盘。

4. 发明授权

US6122242A Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 有权
标题翻译：光盘记录/再现装置根据不同的标准向/从光盘记录/再现信息
公开(公告)号：US6122242A
公开(公告)日：2000-09-19
申请号：US474907
申请日：1999-12-29
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
IPC分类号： G11B7/00 , G11B7/013 , G11B7/135 , G11B19/12
CPC分类号： G11B7/24085 , G11B19/12 , G11B7/1369 , G11B7/139 , G11B2007/0006
摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.
摘要翻译：一种光盘再现装置，包括：半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜;偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。

5. 发明授权

US6167019A Optical Disc cd recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 有权
标题翻译：光盘记录/再现装置根据不同的标准向/从光盘记录/再现信息
公开(公告)号：US6167019A
公开(公告)日：2000-12-26
申请号：US474554
申请日：1999-12-29
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
IPC分类号： G11B7/00 , G11B7/013 , G11B7/135 , G11B19/12
CPC分类号： G11B7/24085 , G11B7/1369 , G11B7/139 , G11B19/12 , G11B2007/0006
摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.
摘要翻译：一种光盘再现装置，包括半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜，偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面光盘的基板和选择性地遮蔽具有旋转偏振平面的激光束的周边部分的偏振滤光器。在一个实施例中，数值孔径改变单元包括非图案扭转向列型液晶，并且偏振滤光器包括在其周边部分具有偏振特性的偏振膜。

6. 发明授权

US06181668B2 Optical pickup device and wavelength selective diffraction grating 失效
$Optical pickup device and wavelength selective diffraction grating$
标题翻译：光学拾取装置和波长选择性衍射光栅
公开(公告)号：US06181668B2
公开(公告)日：2001-01-30
申请号：US09125987
申请日：1998-08-28
申请人： Seiji Kajiyama , Yasuyuki Kanou , Masato Yamada , Yoichi Tsuchiya , Shuichi Ichiura
发明人： Seiji Kajiyama , Yasuyuki Kanou , Masato Yamada , Yoichi Tsuchiya , Shuichi Ichiura
IPC分类号： G11B712
CPC分类号： G11B7/1369 , G02B5/1828 , G11B7/0943 , G11B7/1275 , G11B7/131 , G11B7/1353 , G11B7/1372 , G11B2007/0006 , G11B2007/13727
摘要： The optical pickup device includes a two wavelength semiconductor laser (23) selectively generating a laser beam having the wavelength of 635 nm and laser beam having the wavelength of 780 nm, a collimator lens (24), a hologram (25) formed on a surface of collimator lens (24), a polarizing glass (22) having an annular polarizing region (40) and an objective lens (21). Hologram (25) does not diffract the laser beam having the wavelength of 635 nm, and diffracts outward the laser beam having the wavelength of 780 nm. Therefore, virtual light source of the laser beam having the wavelength of 780 nm comes closer to the collimator lens (24) than the light source of the laser beam having the wavelength of 635 nm. Therefore, objective lens (21) focuses the laser beam having the wavelength of 635 nm on a recording surface of a transparent substrate (31) of a DVD, and focuses the laser beam having the wavelength of 780 nm on a recording surface of a transparent substrate (32) of a CD-R. Accordingly, the optical pickup device is capable of reproducing both DVD and CD-R having transparent substrates of different thicknesses.
摘要翻译：光拾取装置包括选择性地产生波长为635nm的激光束和波长为780nm的激光束的双波长半导体激光器（23），准直透镜（24），形成在表面上的全息图（25）准直透镜（24），具有环形偏振片（40）和物镜（21）的偏光玻璃（22）。全息图（25）不会衍射具有635nm波长的激光束，并向外衍射具有780nm波长的激光束。因此，具有波长为780nm的激光束的虚拟光源比具有635nm波长的激光束的光源更靠近准直透镜（24）。因此，物镜（21）将具有635nm波长的激光束聚焦在DVD的透明基板（31）的记录表面上，并将具有780nm波长的激光束聚焦在透明的记录表面上 CD-R的底物（32）。因此，光学拾取装置能够再现具有不同厚度的透明衬底的DVD和CD-R。

7. 发明授权

US06552990B1 Optical head for two different disk thicknesses with a light beam diameter control device 有权
标题翻译：具有光束直径控制装置的两个不同光盘厚度的光头
公开(公告)号：US06552990B1
公开(公告)日：2003-04-22
申请号：US09180301
申请日：1998-11-05
申请人： Seiji Kajiyama , Yoichi Tsuchiya , Masato Yamada , Yasuyuki Kanou , Shuichi Ichiura
发明人： Seiji Kajiyama , Yoichi Tsuchiya , Masato Yamada , Yasuyuki Kanou , Shuichi Ichiura
IPC分类号： G11B700
CPC分类号： G11B7/1353 , G11B7/08582 , G11B7/123 , G11B7/127 , G11B7/1362 , G11B7/1367 , G11B7/139 , G11B2007/0006 , G11B2007/13727
摘要： An optical pickup device which includes a semiconductor laser selectively generating a laser beam with a wavelength of 635 nm, a laser beam with a wavelength of 780 nm, and an optical device having a central region in which a hologram is formed and a peripheral region in which a diffraction grating is formed. In particular, the optical device is arranged immediately below an objective lens, and the central region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction but increases the diameter of the teaser beam to the wavelength of 780 nm by diffraction. On the other hand, peripheral region allows transmission of the laser beam with the wavelength of 635 nm without any diffraction, but substantially shields the laser beam with the wavelength of 780 nm by diffraction. Thus, each laser beam with the wavelength 635 nm is transmitted through objective lens and focused on a signal recording surface of a DVD. The periphery of the laser beam with the wavelength of 780 nm is significantly diffracted by peripheral region of optical device and only the central portion of the laser beam enters objective lens while increasing its diameter. Thus, the laser beam with the wavelength of 780 nm is focused on a signal recording surface of a CD-R or a CD-ROM. Therefore, the optical pickup device is capable of compatibly reproducing the DVD, CD-R and CD-ROM.
摘要翻译：一种光拾取装置，包括选择性地产生波长为635nm的激光束的半导体激光器，波长为780nm的激光束，以及具有形成全息图的中心区域的光学元件和周边区域形成衍射光栅。特别地，光学装置被布置在物镜的正下方，并且中心区域允许透射具有635nm波长的激光束而没有任何衍射，但是通过衍射将前导光束的直径增加到780nm的波长。另一方面，外围区域允许透射波长为635nm的激光束而没有衍射，但是通过衍射基本上屏蔽了波长为780nm的激光束。因此，波长为635nm的每个激光束通过物镜透射并聚焦在DVD的信号记录表面上。波长为780nm的激光束的周围被光学器件的周边区域显着地衍射，并且只有激光束的中心部分在增加其直径的同时进入物镜。因此，将波长为780nm的激光束聚焦在CD-R或CD-ROM的信号记录面上。因此，光学拾取装置能够兼容地再现DVD，CD-R和CD-ROM。

8. 发明授权

US6137764A Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 失效
公开(公告)号：US6137764A
公开(公告)日：2000-10-24
申请号：US474991
申请日：1999-12-29
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
IPC分类号： G11B7/00 , G11B7/013 , G11B7/135 , G11B19/12
CPC分类号： G11B7/24085 , G11B19/12 , G11B7/1369 , G11B7/139 , G11B2007/0006
摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.

9. 发明授权

US6049518A Optical disc recording/reproducing apparatus recording/reproducing information to/from optical discs according to different standards 失效
公开(公告)号：US6049518A
公开(公告)日：2000-04-11
申请号：US668244
申请日：1996-06-21
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
IPC分类号： G11B7/00 , G11B7/013 , G11B7/135 , G11B19/12
CPC分类号： G11B7/24085 , G11B19/12 , G11B7/1369 , G11B7/139 , G11B2007/0006
摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively shading a peripheral portion of the laser beam having the rotated plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristics at its peripheral portion.

10. 发明授权

US5787061A Optical disc recording reproducing apparatus recording/reproducing information to/from optical discs according to different standards 失效
标题翻译：根据不同标准从光盘记录/再现信息的光盘记录重放装置
公开(公告)号：US5787061A
公开(公告)日：1998-07-28
申请号：US608848
申请日：1996-02-29
申请人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
发明人： Yoichi Tsuchiya , Seiji Kajiyama , Yasuyuki Kanou , Shuichi Ichiura
IPC分类号： G11B7/00 , G11B7/013 , G11B7/09 , G11B7/135 , G11B19/12
CPC分类号： G11B7/139 , G11B19/12 , G11B7/0941 , G11B7/1369 , G11B7/24085 , G11B2007/0006 , G11B2007/13727
摘要： An optical disc reproducing apparatus includes a semiconductor laser, an objective lens converging a laser beam from the semiconductor laser on a recording surface of an optical disc, a polarization plane rotating unit selectively rotating the plane of polarization of the laser beam according to the thickness of a substrate of the optical disc, and a polarizing filter selectively blocking a peripheral portion of the laser beam depending on the plane of polarization. In one embodiment, a numerical aperture changing unit includes a non-patterned twisted nematic liquid crystal, and the polarizing filter includes a polarizing film having a polarization characteristic at its peripheral portion.
摘要翻译：一种光盘再现装置，包括半导体激光器，将来自半导体激光器的激光束会聚在光盘的记录面上的物镜，偏振面旋转单元，根据激光束的厚度选择性地旋转激光束的偏振面光盘的基板和偏振滤光器，其根据偏振面选择性地阻挡激光束的周边部分。在一个实施例中，数值孔径改变单元包括非图案扭曲向列型液晶，并且偏振滤光器包括在其周边部分具有极化特性的偏振膜。

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