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11. 发明授权

US06798723B2 Optical pickup head and information recording/reproducing device 有权
标题翻译：光拾取头和信息记录/再现装置
公开(公告)号：US06798723B2
公开(公告)日：2004-09-28
申请号：US10163443
申请日：2002-06-04
申请人： Hideki Hayashi , Sadao Mizuno , Daisuke Ogata , Shin-ichi Kadowaki , Kousei Sano , Jouji Anzai , Akihiro Yasuda
发明人： Hideki Hayashi , Sadao Mizuno , Daisuke Ogata , Shin-ichi Kadowaki , Kousei Sano , Jouji Anzai , Akihiro Yasuda
IPC分类号： G11B700
CPC分类号： G11B7/131 , G11B7/0903 , G11B7/1353 , G11B7/13927 , G11B2007/0013
摘要： An optical pickup head is provided with a light source, a diffracting means for creating a plurality of diffracted beams, a converging means for focusing the diffracted beams onto an optical storage medium, a beam branching means for branching the plurality of beams reflected by the optical storage medium, and an optical detecting means for outputting a signal corresponding to the amount of light of the received beams. The optical detecting means has main beam light receiving portions and sub-beam light receiving portions. The amount of light of the first or higher order diffracted beams when they are substantially focused on and reflected by a focus plane of the plurality of information recording planes is equal to or greater than the amount of light of the zero order diffracted beam when it is reflected without focusing by a non-focus plane other then the focus plane of the plurality of information recording planes. The invention provides an optical pickup head where offset is not generated in the TE signals even during tracking with the objective lens when a two-layered disk is used.
摘要翻译：光拾取头设置有光源，用于产生多个衍射光束的衍射装置，用于将衍射光束聚焦到光存储介质上的会聚装置，用于将由光学器件反射的多个光束分支的光束分支装置存储介质，以及光检测装置，用于输出对应于接收光束的光量的信号。光检测装置具有主光束光接收部分和副光束光接收部分。当它们基本上聚焦在多个信息记录面的聚焦平面上并被其反射时，第一或更高阶衍射光束的光量等于或大于零级衍射光束的光量反射而不聚焦在多个信息记录平面的焦点平面之外的非聚焦平面。本发明提供了一种光拾取头，即使在使用双层盘的情况下在物镜进行跟踪期间，也不会在TE信号中产生偏移。

12. 发明授权

US5978346A Optical head 失效
标题翻译：光头
公开(公告)号：US5978346A
公开(公告)日：1999-11-02
申请号：US16527
申请日：1998-01-30
申请人： Sadao Mizuno , Tsuguhiro Korenaga , Shinji Uchida
发明人： Sadao Mizuno , Tsuguhiro Korenaga , Shinji Uchida
IPC分类号： G11B7/00 , G11B7/135 , G11B7/12
CPC分类号： G11B7/1395 , G11B7/1353 , G11B7/1356 , G11B7/1365 , G11B7/1374 , G11B7/1381 , G11B2007/0006 , G11B2007/13727
摘要： An optical head has a light source; luminous flux splitting means for splitting radiation luminous flux of linearly polarized light radiated from the light source into plural luminous fluxes without changing the luminous flux diameter substantially; a wavelength plate for polarizing at least one of the luminous fluxes split by the luminous flux splitting means into a nearly circularly polarized light as illumination luminous flux; an objective lens for converging the illumination luminous flux through the wavelength plate on an optical information medium and collecting the reflected light; and a photodetector for receiving the reflected luminous flux collected by the objective lens after passing through the wavelength plate and the luminous flux splitting means. The quantity of received light for maintaining the S/N ratio is sufficient for reproducing a high density optical disk and a conventional optical disk with a large birefringence.
摘要翻译：光头具有光源; 光束分离装置，用于将从光源辐射的线偏振光的辐射光束分散成多个光束而不改变光通量; 波长板，用于将由光束分离装置分割的光束中的至少一个偏振成近似圆偏振光作为照明光束; 用于将通过波长板的照明光束会聚在光信息介质上并收集反射光的物镜; 以及光电检测器，用于接收通过波长板和光通量分离装置之后由物镜收集的反射光通量。用于保持S / N比的接收光量足以再现高密度光盘和具有大双折射率的传统光盘。

13. 发明授权

US5912868A Optical head for reproducing data from first and second optical disks 失效
标题翻译：用于从第一和第二光盘再现数据的光学头
公开(公告)号：US5912868A
公开(公告)日：1999-06-15
申请号：US918295
申请日：1997-08-25
申请人： Hideki Hayashi , Sadao Mizuno , Noboru Ito , Kenichiro Urairi , Yoshiaki Komma
发明人： Hideki Hayashi , Sadao Mizuno , Noboru Ito , Kenichiro Urairi , Yoshiaki Komma
IPC分类号： G11B7/14 , G11B7/00 , G11B7/12 , G11B7/125 , G11B7/135
CPC分类号： G11B7/1353 , G11B7/123 , G11B7/127 , G11B7/1356 , G11B7/1381 , G11B7/13922 , G11B2007/0006 , G11B2007/13727
摘要： An optical head for reproducing data from first and second optical disks which are different from each other in at least one of a base material thickness and an available wavelength, includes: a first light source for emitting a first light beam, the first light beam being used for reproducing data from the first optical disk: an optical system designed to converge the first light beam onto the first optical disk in accordance with a base material thickness and an available wavelength of the first optical disk: and a second light source for emitting a second light beam, the second light beam being used for reproducing data from the second optical disk, wherein an optical path length between the second light source and the optical system is different from an optical path length between the first light source and the optical system, and wherein the optical system converges the second light beam onto the second optical disk.
摘要翻译：一种用于从基材厚度和可用波长中的至少一个中彼此不同的第一和第二光盘再现数据的光学头包括：用于发射第一光束的第一光源，第一光束是用于从第一光盘再现数据：被设计为根据第一光盘的基材厚度和可用波长将第一光束会聚到第一光盘上的光学系统，以及用于发射第一光盘的第二光源第二光束，第二光束用于从第二光盘再现数据，其中第二光源和光学系统之间的光路长度不同于第一光源和光学系统之间的光程长度，并且其中所述光学系统将所述第二光束会聚到所述第二光盘上。

14. 发明授权

US5440536A Optical disk apparatus for producing information recorded on a recording track 失效
标题翻译：用于产生记录在记录磁道上的信息的光盘装置
公开(公告)号：US5440536A
公开(公告)日：1995-08-08
申请号：US202518
申请日：1994-02-28
申请人： Noboru Ito , Shinichi Tanaka , Hidenori Wada , Sadao Mizuno , Hideki Hayashi
发明人： Noboru Ito , Shinichi Tanaka , Hidenori Wada , Sadao Mizuno , Hideki Hayashi
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/005 , G11B7/09 , G11B7/13
CPC分类号： G11B7/131 , G11B7/0045 , G11B7/0943
摘要： An optical disk apparatus includes a photodetector divided into eight segments which receive the laser beam reflected from the optical disk and produce signals based on the laser beam sport thereon. In this apparatus, these eight segments are combined in several patterns for the recorded information reproduction, the tracking error detection, and the focus error detection, respectively. For the recorded information reproduction, eight segments are used as combined in three segment cells RC1, RC2, and RC3 which extend in a direction parallel to each other such that the segment cell RC1 is in center and is sandwitched by other segment cell RC2 and RC3. The segment cells RC1, RC2, and RC3 are located perpendicular to the recording track of the optical disk and produce three signals C, R, and L indicative of the laser beam intensity of the laser beam spot thereon, respectively. Thus obtained signals C is multiplied by a constant K and then added to the other signals R and L. By selecting suitable value as the constant K, the crosstalk component in the reproduced signal can be reduced.
摘要翻译：光盘装置包括被分成八个部分的光电检测器，其接收从光盘反射的激光束并基于其上的激光束运动产生信号。在这种装置中，这八个段分别以记录信息再现，跟踪误差检测和聚焦误差检测的多种模式组合。对于记录的信息再现，八个段被组合在三个分段单元RC1，RC2和RC3中，它们在彼此平行的方向上延伸，使得分段单元RC1处于中心并被其它分段单元RC2和RC3 。分段单元RC1，RC2和RC3垂直于光盘的记录轨道定位，并分别产生表示激光束点的激光束强度的三个信号C，R和L。这样获得的信号C乘以常数K，然后加到其他信号R和L.通过选择合适的值作为常数K，可以减少再现信号中的串扰分量。

15. 发明授权

US5345072A Focus detection device for reading information from an optical recording medium 失效
标题翻译：用于从光学记录介质读取信息的对焦检测装置
公开(公告)号：US5345072A
公开(公告)日：1994-09-06
申请号：US997293
申请日：1992-12-23
申请人： Hideki Hayashi , Shinichi Tanaka , Sadao Mizuno , Noboru Ito , Yoshiaki Komma
发明人： Hideki Hayashi , Shinichi Tanaka , Sadao Mizuno , Noboru Ito , Yoshiaki Komma
IPC分类号： G11B7/09 , G11B7/135 , G01J1/20 , G11B7/00
CPC分类号： G11B7/1353 , G11B7/0912
摘要： A focus detection device for use in a focus detection device includes a main light source and two auxiliary light sources. These auxiliary light sources are offset to the main light source along the optical axis of the main optical system while being symmetrically positioned perpendicular to the optical axis. A exposure units having apertures are provided above the two auxiliary light sources for constricting the amount of auxiliary lights so that the convergence of the auxiliary beams on the optical disk is less than that of the main light beam. As a result, an optical system with a broad focus error detection range can be constructed while increasing the convergence of the main light beam.
摘要翻译：用于焦点检测装置的焦点检测装置包括主光源和两个辅助光源。这些辅助光源沿着主光学系统的光轴偏移到主光源，同时垂直于光轴对称定位。具有孔径的曝光单元设置在两个辅助光源上方，用于限制辅助光的量，使得辅助光束在光盘上的会聚小于主光束的会聚。结果，可以在增加主光束的会聚的同时构造具有宽聚焦误差检测范围的光学系统。

16. 发明授权

US08064314B2 Optical head and optical disc device 有权
标题翻译：光头和光盘装置
公开(公告)号：US08064314B2
公开(公告)日：2011-11-22
申请号：US11997018
申请日：2006-07-20
申请人： Sadao Mizuno
发明人： Sadao Mizuno
IPC分类号： G11B7/12
CPC分类号： G11B7/1353 , G02B5/1814 , G02B27/4238 , G02B27/4277 , G11B7/1275 , G11B7/1374 , G11B2007/0006
摘要： A compact and inexpensive optical head that enables stable compatible playback and compatible recording with optical discs of different kinds with the use of a single objective lens is achieved. The order of diffracted light at which the diffraction efficiency by a diffraction element forming the objective lens becomes the maximum is set to the third order for blue light, the second order for red light, and the second order for infrared light in the inner peripheral portion of the diffraction element, and to the sixth order for blue light, the fourth order for red light, and the third order for infrared light to limit the aperture for infrared light in the intermediate peripheral portion. In the outer peripheral portion, the aperture for red light is limited by setting the order to an integer other than multiples of 3 for blue light.
摘要翻译：实现了一种紧凑且廉价的光学头，其使用单个物镜实现了与不同种类的光盘的稳定兼容回放和兼容记录。构成物镜的衍射元件的衍射效率最大的衍射光的顺序为蓝色光的三次，红光的二次，红外线的第二次的内周部的衍射元件，对于蓝色光为第六级，红色为第四级，红外光为三级，以限制中间周边部分中的红外光的孔径。在外周部，通过将蓝光的倍数设为3以外的整数来限制红光的开口。

17. 发明申请

US20100157777A1 OPTICAL HEAD AND OPTICAL DISC DEVICE 有权
标题翻译：光头和光盘设备
公开(公告)号：US20100157777A1
公开(公告)日：2010-06-24
申请号：US11997018
申请日：2006-07-20
申请人： Sadao Mizuno
发明人： Sadao Mizuno
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G02B5/1814 , G02B27/4238 , G02B27/4277 , G11B7/1275 , G11B7/1374 , G11B2007/0006
摘要： A compact and inexpensive optical head that enables stable compatible playback and compatible recording with optical discs of different kinds with the use of a single objective lens is achieved. The order of diffracted light at which the diffraction efficiency by a diffraction element forming the objective lens becomes the maximum is set to the third order for blue light, the second order for red light, and the second order for infrared light in the inner peripheral portion of the diffraction element, and to the sixth order for blue light, the fourth order for red light, and the third order for infrared light to limit the aperture for infrared light in the intermediate peripheral portion. In the outer peripheral portion, the aperture for red light is limited by setting the order to an integer other than multiples of 3 for blue light.
摘要翻译：实现了一种紧凑且廉价的光学头，其使用单个物镜实现了与不同种类的光盘的稳定兼容回放和兼容记录。构成物镜的衍射元件的衍射效率最大的衍射光的顺序为蓝色光的三次，红光的二次，红外线的第二次的内周部的衍射元件，对于蓝色光为第六级，红色为第四级，红外光为三级，以限制中间周边部分中的红外光的孔径。在外周部，通过将蓝光的倍数设为3以外的整数来限制红光的开口。

18. 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。

19. 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.

20. 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。

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