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1. 发明授权

US5434840A Non-linear reflectance optical information recording layer irradiated by a light beam controlled with an amplitude filter 失效
标题翻译：由用振幅滤波器控制的光束照射的非线性反射光学信息记录层
公开(公告)号：US5434840A
公开(公告)日：1995-07-18
申请号：US118726
申请日：1993-09-10
申请人： Toshiharu Ezuka , Fumihiko Yokogawa
发明人： Toshiharu Ezuka , Fumihiko Yokogawa
IPC分类号： G11B7/135 , G11B7/125 , G11B7/24 , G11B7/095
CPC分类号： G11B7/1381 , G11B7/24
摘要： Disclosed is an optical disk player capable of suppressing the influence of side lobes of an irradiated spot on the reflected light from an optical disk, thereby ensuring an improved recording/reproducing characteristic. The optical disk player comprises an optical irradiation system for focusing a laser beam as a spot along an information recording portion of an optical disk, and an optical detection system for guiding reflected light from the spot to a photosensor, whereby recorded information is reproduced based on an output signal from the photosensor. The information recording portion is formed of a reflection film whose reflectance increases gradually or stepwise in accordance with an increase in intensity of incident light. The optical irradiation system has an amplitude filter or a phase filter.
摘要翻译：公开了一种光盘播放器，其能够抑制照射点的旁瓣对来自光盘的反射光的影响，从而确保改善的记录/再现特性。光盘播放器包括：用于将激光束沿着光盘的信息记录部分聚焦在一起的光照射系统，以及用于将来自该点的反射光引导到光传感器的光学检测系统，由此基于来自光电传感器的输出信号。信息记录部分由反射膜根据入射光强度的增加而逐渐或逐步增加的反射膜形成。光照射系统具有振幅滤波器或相位滤波器。

2. 发明申请

US20050206731A1 Aberration correction apparatus, and control apparatus, control method and control program of optical pickup 失效
标题翻译：畸变校正装置，光学拾取器的控制装置，控制方法和控制程序
公开(公告)号：US20050206731A1
公开(公告)日：2005-09-22
申请号：US11074740
申请日：2005-03-09
申请人： Masakazu Ogasawara , Toshiharu Ezuka
发明人： Masakazu Ogasawara , Toshiharu Ezuka
IPC分类号： G02F1/13 , G11B7/00 , G11B7/125 , G11B7/135 , H04N17/00
CPC分类号： G11B7/1275 , G11B7/13925 , G11B2007/0006
摘要： An aberration correction apparatus includes an optical pickup having a liquid crystal panel for correcting an aberration of a light beam emitted from a light source and irradiated on a recording medium and a control unit which applies, to the liquid crystal panel, a bias voltage in order to correct the aberration. The bias voltage is a voltage at which a diffraction generated in the light beam passing through an electrode gap portion between electrode portions of the liquid crystal panel is minimum. For instance, the bias voltage is the voltage at which a phase difference between the light beam passing through the electrode portions of the liquid crystal panel and the light beam passing through the electrode gap portion is an integral multiple of a wavelength of the light beam. It is thereby possible to prevent unnecessary diffracted light from being generated by the liquid crystal panel for correcting the aberrations.
摘要翻译：一种像差校正装置，包括具有用于校正从光源发射并照射在记录介质上的光束的像差的液晶面板的光学拾取器和控制单元，该控制单元按顺序向液晶面板施加偏置电压以纠正像差。偏置电压是通过液晶面板的电极部之间的电极间隙部分的光束中产生的衍射最小的电压。例如，偏置电压是通过液晶面板的电极部分的光束与通过电极间隙部分的光束之间的相位差是光束的波长的整数倍的电压。从而可以防止由用于校正像差的液晶面板产生不必要的衍射光。

3. 发明授权

US06597442B2 Apparatus for measuring aberration of a lens and an apparatus for adjusting a position of the lens 失效
标题翻译：用于测量透镜的像差的装置和用于调节透镜位置的装置
公开(公告)号：US06597442B2
公开(公告)日：2003-07-22
申请号：US09820284
申请日：2001-03-29
申请人： Takanori Maeda , Toshiharu Ezuka
发明人： Takanori Maeda , Toshiharu Ezuka
IPC分类号： G01B900
CPC分类号： G01M11/0271 , G01M11/0214 , G01M11/0242
摘要： An aberration detector for easily detecting aberration of a lens in a short time period by utilizing an interferometer. The aberration detector includes a laser diode, a beam splitter for dividing a light beam into two light beams, an optical system for supporting a lens and converging a light beam passing through the lens to a converging point, a spherical mirror for reflecting the light beam passing through the lens, an image pickup element for detecting an interference pattern obtained by interference of a reference light and the light reflected on the spherical mirror, and an analyzer for analyzing the interference pattern. A center of a sphere constituting the spherical mirror is arranged in a position displaced from the converging point such that a plurality of circular fringes are concentrically arranged on the interference pattern.
摘要翻译：一种用于通过利用干涉仪在短时间内容易地检测透镜的像差的像差检测器。像差检测器包括激光二极管，用于将光束分成两个光束的分束器，用于支撑透镜并将通过透镜的光束会聚到会聚点的光学系统，用于反射光束的球面镜通过透镜，用于检测通过参考光的干涉和反射在球面镜上的光获得的干涉图案的图像拾取元件和用于分析干涉图案的分析器。构成球面镜的球的中心布置在从会聚点偏移的位置，使得多个圆形条纹同心地布置在干涉图案上。

4. 发明授权

US07542397B2 Aberration correction apparatus, and control apparatus, control method and control program of optical pickup 失效
标题翻译：畸变校正装置，光学拾取器的控制装置，控制方法和控制程序
公开(公告)号：US07542397B2
公开(公告)日：2009-06-02
申请号：US11074740
申请日：2005-03-09
申请人： Masakazu Ogasawara , Toshiharu Ezuka
发明人： Masakazu Ogasawara , Toshiharu Ezuka
IPC分类号： G11B7/00
CPC分类号： G11B7/1275 , G11B7/13925 , G11B2007/0006
摘要： An aberration correction apparatus includes an optical pickup having a liquid crystal panel for correcting an aberration of a light beam emitted from a light source and irradiated on a recording medium and a control unit which applies, to the liquid crystal panel, a bias voltage in order to correct the aberration. The bias voltage is a voltage at which a diffraction generated in the light beam passing through an electrode gap portion between electrode portions of the liquid crystal panel is minimum. For instance, the bias voltage is the voltage at which a phase difference between the light beam passing through the electrode portions of the liquid crystal panel and the light beam passing through the electrode gap portion is an integral multiple of a wavelength of the light beam. It is thereby possible to prevent unnecessary diffracted light from being generated by the liquid crystal panel for correcting the aberrations.
摘要翻译：一种像差校正装置，包括具有用于校正从光源发射并照射在记录介质上的光束的像差的液晶面板的光学拾取器和控制单元，该控制单元按顺序向液晶面板施加偏置电压以纠正像差。偏置电压是通过液晶面板的电极部之间的电极间隙部分的光束中产生的衍射最小的电压。例如，偏置电压是通过液晶面板的电极部分的光束与通过电极间隙部分的光束之间的相位差是光束的波长的整数倍的电压。从而可以防止由用于校正像差的液晶面板产生不必要的衍射光。

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