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11. 发明授权

US6069860A Optical head with objective lens having different numerical apertures to minimize light aberration with respect to optical disks of different thicknesses 失效
标题翻译：具有不同数值孔径的物镜的光学头，以使相对于不同厚度的光盘的光像差最小化
公开(公告)号：US6069860A
公开(公告)日：2000-05-30
申请号：US972913
申请日：1997-11-18
申请人： Sadao Mizuno , Yoshiaki Komma
发明人： Sadao Mizuno , Yoshiaki Komma
IPC分类号： G11B7/00 , G11B7/135
CPC分类号： G11B7/1381 , G11B7/1367 , G11B7/1374 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： The objective lens of the present invention includes a center portion and a periphery portion surrounding the center portion. An aberration of the periphery portion is corrected such that a light spot is formed by the convergence of a luminous flux which has been transmitted through the periphery portion and then transmitted through a first light transmissive flat plate, and an aberration of the center portion is corrected such that a light spot is formed by the convergence of a luminous flux which has been transmitted through the center portion and then transmitted through a second light transmissive flat plate which is thicker than the first light transmissive flat plate.
摘要翻译：本发明的物镜包括围绕中心部分的中心部分和周边部分。校正周边部分的像差，使得通过已透射通过周边部分然后透射通过第一透光平板的光束的会聚而形成光斑，并且校正中心部分的像差使得通过已经透射通过中心部分然后透射通过比第一透光平板厚的第二透光平板的光束的会聚形成光点。

12. 发明授权

US5446565A Compound objective lens having two focal points 失效
标题翻译：具有两个焦点的复合物镜
公开(公告)号：US5446565A
公开(公告)日：1995-08-29
申请号：US190520
申请日：1994-02-01
申请人： Yoshiaki Komma , Sadao Mizuno , Seji Nishino
发明人： Yoshiaki Komma , Sadao Mizuno , Seji Nishino
IPC分类号： G02B5/32 , G02B3/10 , G02B5/18 , G02B13/00 , G02B21/02 , G02B21/18 , G02B21/20 , G03F9/00 , G11B7/00 , G11B7/007 , G11B7/085 , G11B7/09 , G11B7/095 , G11B7/12 , G11B7/135 , G11B7/24 , G11B19/12
CPC分类号： G11B7/0945 , G02B21/025 , G02B21/18 , G02B21/20 , G02B27/4238 , G02B3/10 , G02B5/1819 , G02B5/1842 , G02B5/1871 , G02B5/1876 , G02B5/32 , G03F9/00 , G03F9/7038 , G03F9/7088 , G11B19/12 , G11B19/127 , G11B7/08511 , G11B7/0901 , G11B7/0909 , G11B7/0912 , G11B7/123 , G11B7/1353 , G11B7/1369 , G11B7/1372 , G11B7/1374 , G11B7/139 , G11B7/24 , G11B2007/0006 , G11B2007/13727 , G11B7/00736
摘要： A compound objective lens is composed of a hologram lens for transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the incident light to form a beam of first-order diffracted light, and an objective lens for converging the transmitted light to form a first converging spot on a front surface of a thin type of first information medium and converging the diffracted light to form a second converging spot on a front surface of a thick type of second information medium. Because the hologram lens selectively functions as a concave lens for the diffracted light, a curvature of the transmitted light differs from that of the diffracted light. Therefore, even though the first and second information mediums have different thicknesses, the transmitted light incident on a rear surface of the first information medium is converged on the its front surface, and the diffracted light incident on a rear surface of the second information medium is converged on the its front surface. That is, the compound objective lens has two focal points.
摘要翻译：复合物镜由用于透射入射光的一部分而没有任何衍射的全息透镜构成，以形成透射光束并衍射入射光的剩余部分以形成一级衍射光束，并且目标透镜，用于会聚透射光以在薄型第一信息介质的前表面上形成第一会聚点，并且会聚衍射光以在厚型第二信息介质的前表面上形成第二会聚点。由于全息透镜选择性地用作衍射光的凹透镜，透射光的曲率与衍射光的曲率不同。因此，即使第一信息介质和第二信息介质具有不同的厚度，入射在第一信息介质的后表面上的透射光会聚在其前表面上，并且入射在第二信息介质的后表面上的衍射光是会聚在其前表面。也就是说，复合物镜具有两个焦点。

13. 发明申请

US20080013414A1 Optical Head For Optical Recorder/Reproducer 有权
标题翻译：光学记录仪/复制光头
公开(公告)号：US20080013414A1
公开(公告)日：2008-01-17
申请号：US11597996
申请日：2005-05-31
申请人： Hidenori Wada , Sadao Mizuno , Yoshiaki Komma , Keiichi Matsuzaki
发明人： Hidenori Wada , Sadao Mizuno , Yoshiaki Komma , Keiichi Matsuzaki
IPC分类号： G11B7/00
CPC分类号： G11B7/12 , G11B7/1356
摘要： An optical head for recording or reproducing a signal on or from an optical recording medium comprising a light source, an objective lens for condensing light emitted from the light source to the optical recording medium, and a light-separating means arranged between the light source and the objective lens in order to separate the light reflected from the optical recording medium from the light emitted from the light source is characterized in that the light-separating means consists of a first glass, a multilayer film formed on the first glass, and an adhesive layer arranged on the multilayer film in order to bond a second glass onto the multilayer film, and the majority of the light emitted from the light source enters into the light-separating means through the first glass and is reflected by the multilayer film.
摘要翻译：一种用于在包括光源的光记录介质上或从光记录介质上记录或再现信号的光学头，用于将从光源发射的光聚焦到光记录介质的物镜，以及布置在光源和为了将从光记录介质反射的光与从光源发射的光分离，物镜的特征在于，分光装置由第一玻璃，形成在第一玻璃上的多层膜和粘合剂层，以将第二玻璃粘合到多层膜上，并且从光源发射的大部分光通过第一玻璃进入分光装置，并被多层膜反射。

14. 发明申请

US20060233071A1 Optical head device and optical information apparatus using the same 有权
公开(公告)号：US20060233071A1
公开(公告)日：2006-10-19
申请号：US11443750
申请日：2006-05-31
申请人： Seiji Nishino , Hidenori Wada , Yoshiaki Komma , Sadao Mizuno , Keiichi Matsuzaki
发明人： Seiji Nishino , Hidenori Wada , Yoshiaki Komma , Sadao Mizuno , Keiichi Matsuzaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1398 , G11B7/1353 , G11B7/1367 , G11B7/1372 , G11B7/1378 , G11B7/13922 , G11B7/13925
摘要： An optical head device includes a focusing optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens. A chromatic aberration correction element for correcting chromatic aberration occurring in the objective lens is provided between the semiconductor laser light source and the optical information medium. A light distribution correction element in which the transmittance increases with the distance from the center of the aperture surface of the objective lens is provided so as to correct a reduction of the intensity of the light incident on the aperture surface of the objective lens with the distance from the center of the aperture surface.

15. 发明授权

US06927375B2 Optical element, optical head and optical information processor 有权
标题翻译：光学元件，光学头和光学信息处理器
公开(公告)号：US06927375B2
公开(公告)日：2005-08-09
申请号：US10312436
申请日：2001-06-25
申请人： Hiroaki Yamamoto , Yoshiaki Komma , Shin-ichi Kadowaki , Sadao Mizuno
发明人： Hiroaki Yamamoto , Yoshiaki Komma , Shin-ichi Kadowaki , Sadao Mizuno
IPC分类号： G02B5/18 , G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135 , G02B27/42 , G11B7/00
CPC分类号： G02B5/1833 , G02B5/1823 , G02B27/4238 , G02B27/4255 , G02B27/4261 , G11B7/0901 , G11B7/0943 , G11B7/123 , G11B7/131 , G11B7/1353 , G11B7/1381
摘要： A light beam reflected by an information medium is split by a diffraction optical system into first diffraction light and second diffraction light, which is not a complex conjugate wave of the first diffraction light, in a predetermined energy distribution ratio. The first diffraction light enters a first photodetector (195) of a photodetector and is used for reading out data information recorded on the information medium, while the second diffraction light enters second and third photodetectors (194, 195) and is used for obtaining a servo error signal. With this optical head device, the area of the first photodetector can be reduced, thus allowing a high-speed reproduction of a data signal. Further, the first photodetector becomes less susceptible to stray light. Moreover, the number of head amplifiers, which are needed for detecting the data signal, decreases, and the S/N ratio improves.
摘要翻译：由信息介质反射的光束以预定的能量分配比例被衍射光学系统分割成不是第一衍射光的复共轭的第一衍射光和第二衍射光。第一衍射光进入光电检测器的第一光电检测器（195），并且用于读出记录在信息介质上的数据信息，而第二衍射光进入第二和第三光电检测器（194,195），并用于获得伺服误差信号。利用该光学头装置，可以减小第一光电检测器的面积，从而允许数据信号的高速再现。此外，第一光电检测器变得不易受杂散光的影响。此外，检测数据信号所需的头放大器的数量减少，并且S / N比提高。

16. 发明授权

US06272099B1 Objective lens with center and periphery portions producing reciprocal interference, and optical head and optical disk device using the same 有权
标题翻译：具有产生相互干涉的中心和周边部分的物镜，以及使用其的光学头和光盘装置
公开(公告)号：US06272099B1
公开(公告)日：2001-08-07
申请号：US09550648
申请日：2000-04-14
申请人： Sadao Mizuno , Yoshiaki Komma
发明人： Sadao Mizuno , Yoshiaki Komma
IPC分类号： G11B700
CPC分类号： G11B7/1381 , G11B7/1367 , G11B7/1374 , G11B7/139 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： The objective lens of the present invention includes a center portion and a periphery portion surrounding the center portion. An aberration of the periphery portion is corrected such that a light spot is formed by the convergence of a luminous flux which has been transmitted through the periphery portion and then transmitted through a first light transmissive flat plate, and an aberration of the center portion is corrected such that a light spot is formed by the convergence of a luminous flux which has been transmitted through the center portion and then transmitted through a second light transmissive flat plate which is thicker than the first light transmissive flat plate.
摘要翻译：本发明的物镜包括围绕中心部分的中心部分和周边部分。校正周边部分的像差，使得通过已透射通过周边部分然后透射通过第一透光平板的光束的会聚而形成光斑，并且校正中心部分的像差使得通过已经透射通过中心部分然后透射通过比第一透光平板厚的第二透光平板的光束的会聚形成光点。

17. 发明授权

US5920537A Correction element of lower light intensity around an optical axis of an optical head with a plurality of focal points 失效
标题翻译：具有多个焦点的光学头的光轴周围的较低光强度的校正元件
公开(公告)号：US5920537A
公开(公告)日：1999-07-06
申请号：US13183
申请日：1998-01-26
申请人： Yoshiaki Komma , Sadao Mizuno , Hideki Hayashi , Kenichiro Urairi
发明人： Yoshiaki Komma , Sadao Mizuno , Hideki Hayashi , Kenichiro Urairi
IPC分类号： G11B7/00 , G11B7/135 , G11B7/12
CPC分类号： G11B7/1378 , G11B7/1353 , G11B7/1367 , G11B7/1372 , G11B7/139 , G11B7/1398 , G11B2007/0006
摘要： An optical head apparatus which records or reproduces signals stably on optical disks having different thicknesses. A correction hologram element or a correction filter is provided between a light source and a 2-focus lens in order to decrease optical intensity at a portion distant from the optical axis or to change the optical path length. The light which passes the correction hologram element or a correction filter is converged by the 2-focus lens as a micro-spot on an optical disk. The 2-focus lens comprises a hologram lens which diffracts a part of the light beam and an object lens.
摘要翻译：一种在具有不同厚度的光盘上稳定地记录或再现信号的光学头装置。为了降低远离光轴的部分的光强度，或者改变光路长度，在光源和2焦点透镜之间设置校正全息元件或校正滤光器。通过校正全息元件或校正滤光器的光由作为微点的双焦点透镜会聚在光盘上。双焦点透镜包括衍射光束的一部分和物镜的全息透镜。

18. 发明授权

US5815293A Compound objective lens having two focal points 失效
标题翻译：具有两个焦点的复合物镜，用于与复合物镜会聚光的成像光学系统，用成像光学系统记录或再现信息的光学头装置，具有两种类型的记录的光盘
公开(公告)号：US5815293A
公开(公告)日：1998-09-29
申请号：US455934
申请日：1995-05-31
申请人： Yoshiaki Komma , Sadao Mizuno , Seiji Nishino
发明人： Yoshiaki Komma , Sadao Mizuno , Seiji Nishino
IPC分类号： G02B3/10 , G02B5/18 , G02B5/32 , G02B21/02 , G02B21/18 , G02B21/20 , G03F9/00 , G11B7/00 , G11B7/085 , G11B7/13 , G11B7/135 , G11B19/12 , G02B3/08 , G02B7/00
CPC分类号： G02B5/1895 , G02B21/025 , G02B21/18 , G02B21/20 , G02B27/4238 , G02B3/10 , G02B5/18 , G02B5/1814 , G02B5/1842 , G02B5/1871 , G02B5/1876 , G02B5/32 , G03F9/70 , G03F9/7049 , G03F9/7069 , G03F9/7088 , G11B19/12 , G11B19/127 , G11B7/08511 , G11B7/131 , G11B7/1353 , G11B7/1374 , G11B7/139 , G11B2007/0006 , G11B2007/13727
摘要： A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the incident light to form a beam of first-order diffracted light, and an objective lens for converging the transmitted light to form a first converging spot on a front surface of a thin type of first information medium and converging the diffracted light to form a second converging spot on a front surface of a thick type of second information medium. Because the hologram selectively functions as a concave lens for the diffracted light, a curvature of the transmitted light differs from that of the diffracted light. Therefore, even though the first and second information mediums have different thicknesses, the transmitted light incident on rear surface of the first information medium is converged on the its front surface, and the diffracted light incident on a rear surface of the second information medium is converged on the its front surface. That is, the compound objective lens has two focal points.
摘要翻译：复合物镜由全息透镜构成或透射入射光的一部分而没有任何衍射形成透射光束，衍射入射光的剩余部分以形成一级衍射光束，目标透镜，用于会聚透射光以在薄型第一信息介质的前表面上形成第一会聚点，并且会聚衍射光以在厚型第二信息介质的前表面上形成第二会聚点。由于全息图有选择地用作衍射光的凹透镜，透射光的曲率与衍射光的曲率不同。因此，即使第一信息介质和第二信息介质具有不同的厚度，入射在第一信息介质的后表面上的透射光会聚在其前表面上，并且入射在第二信息介质的后表面上的衍射光会聚在其前面。也就是说，复合物镜具有两个焦点。

19. 发明授权

US5644413A Optical head for adjusting a positional relation between the information medium and the optical head 失效
标题翻译：用于调整信息介质和光学头之间的位置关系的光学头
公开(公告)号：US5644413A
公开(公告)日：1997-07-01
申请号：US501351
申请日：1995-07-12
申请人： Yoshiaki Komma , Sadao Mizuno , Makoto Kato , Hidenori Wada , Seiji Nishino
发明人： Yoshiaki Komma , Sadao Mizuno , Makoto Kato , Hidenori Wada , Seiji Nishino
IPC分类号： G02B5/18 , G02B5/32 , G11B7/09 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1353 , G02B5/1876 , G02B5/32 , G11B7/126 , G11B7/127 , G11B7/1359 , G11B7/1376 , G11B7/1378 , G11B7/13922 , G11B7/0912 , Y10S359/90
摘要： An optical head apparatus consists of a semiconductor laser for radiating a light beam, a first collimator lens for collimating the light beam, a wedge-like prism for reshaping the light beam, a beam splitter for transmitting the light beam in an outgoing path and splitting the light beam in an incoming path, an objective lens for converging the light beam at an information medium in which information is stored, a plane type of hologram lens integrally formed with the objective lens for excessively correcting chromatic aberration of the objective lens to cancel out chromatic aberration of the collimator lens, a second collimator lens for converging the light beam split, a photo detector for detecting intensity of the light beam converged to obtain an information signal and servo signals, and an actuating unit for slightly moving the objective lens and the hologram lens according to the servo signals. A wavelength of the light beam is lengthened as intensity of the light beam is increased. Even though an astigmatic difference occurs in the semiconductor laser, the change of a focal length of the collimator lens cancels out the change of the astigmatic difference to prevent the occurrence of astigmatic aberration.
摘要翻译：光头装置由用于照射光束的半导体激光器，用于准直光束的第一准直透镜，用于整形光束的楔形棱镜，用于在输出路径中传输光束的分束器和分离器入射路径中的光束，用于在存储信息的信息介质处会聚光束的物镜，与物镜整体形成的平面型全息透镜，用于过度校正物镜的色差以抵消准直透镜的色差，用于会聚光束的第二准直透镜，用于检测会聚的光束的强度的光检测器，以获得信息信号和伺服信号，以及用于使物镜稍微移动的致动单元全息透镜根据伺服信号。当光束的强度增加时，光束的波长被延长。即使在半导体激光器中出现散像差异，准直透镜的焦距的变化抵消像散差的变化，从而防止散光像差的发生。

20. 发明申请

US20060215505A1 Optical head device and optical information apparatus using the same 有权
公开(公告)号：US20060215505A1
公开(公告)日：2006-09-28
申请号：US11443751
申请日：2006-05-31
申请人： Seiji Nishino , Hidenori Wada , Yoshiaki Komma , Sadao Mizuno , Keiichi Matsuzaki
发明人： Seiji Nishino , Hidenori Wada , Yoshiaki Komma , Sadao Mizuno , Keiichi Matsuzaki
IPC分类号： G11B7/00
CPC分类号： G11B7/1398 , G11B7/1353 , G11B7/1367 , G11B7/1372 , G11B7/1378 , G11B7/13922 , G11B7/13925
摘要： An optical head device includes a focusing optical system for focusing a laser beam emitted from a semiconductor laser light source on an optical information medium with an objective lens. A chromatic aberration correction element for correcting chromatic aberration occurring in the objective lens is provided between the semiconductor laser light source and the optical information medium. A light distribution correction element in which the transmittance increases with the distance from the center of the aperture surface of the objective lens is provided so as to correct a reduction of the intensity of the light incident on the aperture surface of the objective lens with the distance from the center of the aperture surface.

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