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71. 发明授权

US5673241A Focus detection mechanism and optical head and optical storage device that use it 失效
标题翻译：聚焦检测机构和使用它的光头和光存储设备
公开(公告)号：US5673241A
公开(公告)日：1997-09-30
申请号：US641119
申请日：1996-04-29
申请人： Fumio Koyama , Masatoshi Yonekubo , Takashi Takeda , Toshio Arimura , Hidefumi Sakata , Osamu Yokoyama
发明人： Fumio Koyama , Masatoshi Yonekubo , Takashi Takeda , Toshio Arimura , Hidefumi Sakata , Osamu Yokoyama
IPC分类号： G11B7/09 , G11B7/12 , G11B7/13 , G11B7/135 , G11B11/105
CPC分类号： G11B7/131 , G11B7/0909 , G11B7/123 , G11B7/1353 , G11B11/10543 , G11B7/0912 , G11B7/0916
摘要： The focus detection mechanism of the invention diffracts the return light reflected off target surface by means of holographic element. The diffracted beams are both received by two long photodetection means as two astigmatic convergent beams that forms circles of least confusion on the same plane near focal plane of a lens. The focus detection signal is obtained from differential output of them. Since the mechanism can form two diffracted beams having circles of least confusion on the same plane, the photodetection means for detection can be disposed side by side, thus simplifying production with increased dimensional accuracy. Also, although a holographic element is used, wavelength fluctuation can be absorbed to provide extremely high reliability.
摘要翻译：本发明的焦点检测机构通过全息元件衍射从目标表面反射的返回光。衍射光束由两个长的光电检测装置接收为两个散光会聚光束，其在透镜焦平面附近的相同平面上形成最小混淆的圆。焦点检测信号从差分输出获得。由于该机构可以在同一平面上形成具有最少混淆的圆的两个衍射光束，所以用于检测的光检测装置可以并排布置，从而以增加的尺寸精度简化生产。另外，虽然使用了全息元件，但也可以吸收波长波动，提供极高的可靠性。

72. 发明授权

US5623509A Semiconductor laser and light-sensing device using the same 失效
标题翻译：半导体激光器和光传感器件使用相同
公开(公告)号：US5623509A
公开(公告)日：1997-04-22
申请号：US395886
申请日：1995-02-28
申请人： Hideaki Iwano , Osamu Yokoyama , Hiroaki Nomura
发明人： Hideaki Iwano , Osamu Yokoyama , Hiroaki Nomura
IPC分类号： H01S3/00 , H01S5/00 , H01S5/028 , H01S5/20 , H01S5/343 , H01S3/19
CPC分类号： B82Y20/00 , H01S3/005 , H01S5/20 , H01S5/34313 , H01S2301/18 , H01S5/005 , H01S5/02 , H01S5/028 , H01S5/2004 , H01S5/3432
摘要： A semiconductor laser comprises AlGaAs-type semiconductor layers deposited on a substrate and a current constriction layer having at least one stripe-shaped current injection region. This semiconductor layers comprise: a first cladding layer of the first conductivity type, a first optical waveguide layer of the first conductivity type formed on the first cladding layer, an active layer formed on the first optical waveguide layer and having a quantum-well structure, a second optical waveguide layer of a second conductivity type formed on the active layer, a second cladding layer of the second conductivity type formed on the second optical waveguide layer, and a contact layer formed on the second cladding layer. The active layer has flatness of such a degree that roughness with respect to a reference surface within a unit area of 1 mm.times.1 mm is no more than .+-.0.1 .mu.m, the width of the current injection region of the current constriction layer is between 100 .mu.m to 250 .mu.m, and the resonator length is between 500 .mu.m to 1,000 .mu.m.
摘要翻译：半导体激光器包括沉积在基板上的AlGaAs型半导体层和具有至少一个条形电流注入区域的电流收缩层。该半导体层包括：第一导电类型的第一包层，形成在第一包层上的第一导电类型的第一光波导层，形成在第一光波导层上并具有量子阱结构的有源层，形成在有源层上的第二导电类型的第二光波导层，形成在第二光波导层上的第二导电类型的第二覆层，以及形成在第二覆层上的接触层。有源层具有平坦度，使得在1mm×1mm的单位面积内相对于基准面的粗糙度不大于+/-0.1μm，电流收缩层的电流注入区域的宽度在 100〜250μm，谐振器长度在500〜1000μm之间。

73. 发明授权

US5335026A Eyeglass lens 失效
标题翻译：眼镜镜片
公开(公告)号：US5335026A
公开(公告)日：1994-08-02
申请号：US67878
申请日：1993-05-27
申请人： Kazutoshi Kato , Toshiharu Katada , Osamu Yokoyama
发明人： Kazutoshi Kato , Toshiharu Katada , Osamu Yokoyama
IPC分类号： G02C7/02 , G02C7/06
CPC分类号： G02C7/02
摘要： A lens for eyeglasses which corrects an astigmatism includes a first refracting surface and a second refracting surface. Each refracting surface has an optical center and a periphery. At least one of the refracting surfaces is divided into a first portion and a second portion in which the first portion has a variation in curvature of the lens which is greater than the variation of curvature of the second portion.
摘要翻译：矫正散光的眼镜镜片包括第一折射表面和第二折射表面。每个折射表面具有光学中心和周边。折射表面中的至少一个被分成第一部分和第二部分，其中第一部分具有大于第二部分的曲率变化的透镜的曲率变化。

74. 发明授权

US5270746A Eyeglass lens 失效
标题翻译：眼镜镜片
公开(公告)号：US5270746A
公开(公告)日：1993-12-14
申请号：US714292
申请日：1991-06-12
申请人： Kazutoshi Kato , Toshiharu Katada , Osamu Yokoyama
发明人： Kazutoshi Kato , Toshiharu Katada , Osamu Yokoyama
IPC分类号： G02C7/02 , G02C7/06
CPC分类号： G02C7/02
摘要： A lens for eyeglasses which corrects an astigmatism includes a first refracting surface and a second refracting surface. Each refracting surface has an optical center and a periphery. At least one of the refracting surfaces is divided into a first portion and a second portion in which the first portion has a variation in curvature of the lens which is greater than the variation of curvature of the second portion.

75. 发明授权

US5161040A Optical system with aberration suppression and optical head utilizing the same 失效
标题翻译：光学系统具有抑制和光学头使用它们
公开(公告)号：US5161040A
公开(公告)日：1992-11-03
申请号：US471955
申请日：1990-01-29
申请人： Osamu Yokoyama , Shoichi Uchiyama
发明人： Osamu Yokoyama , Shoichi Uchiyama
IPC分类号： G02B7/08 , G02B13/24 , G02B27/42 , G11B7/09 , G11B7/135
CPC分类号： G11B7/1353 , G02B13/24 , G02B27/42 , G02B7/08 , G11B7/0908
摘要： An optical system, that includes a light source having sufficient coherency to provide a predominate operating wavelength and a diffraction grating lens system to focus the light from the light source to an image point on the optical axis of the optical system, provides for change of position of the image point along the optical axis over a wide focusing range with suppression of generated aberration. In particular, the optical system comprises a light source both movable in the direction of the optical axis and capable of variation in wavelength and a diffraction grating lens system that condenses the beam from the light source onto an image point on and along the optical axis, which system is effective in cancelling out aberration generated due to movement of the light source. The spherical aberration associated with the movement of the image spot brought about by the movement of the light source or its equivalent in the optical system is cancelled out by the chromatic aberration generated by the diffraction grating created by adjustment the light source wavelength.
摘要翻译：一种光学系统，其包括具有足够相干性的光源以提供主要的工作波长和衍射光栅透镜系统，以将来自光源的光聚焦到光学系统的光轴上的图像点，从而提供位置的变化的图像点沿着光轴在宽聚焦范围上，同时抑制所产生的像差。特别地，该光学系统包括能够在光轴方向上移动并能够变化的光源和将来自光源的光束聚集到光轴上并沿着光轴的图像点上的衍射光栅透镜系统，该系统有效地消除由于光源的移动而产生的像差。由光源或其等效物在光学系统中的移动引起的像点移动所引起的球面像差由于通过调节光源波长而产生的衍射光栅产生的色差被抵消。

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