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1. 发明授权

US5434835A Optical disk apparatus 失效
标题翻译：光盘装置
公开(公告)号：US5434835A
公开(公告)日：1995-07-18
申请号：US98252
申请日：1993-07-29
申请人： Hisashi Konno , Suguru Takishima , Takashi Morita , Toshiyuki Kase , Masahiro Oono , Koichi Maruyama , Masato Noguchi , Makoto Iki
发明人： Hisashi Konno , Suguru Takishima , Takashi Morita , Toshiyuki Kase , Masahiro Oono , Koichi Maruyama , Masato Noguchi , Makoto Iki
IPC分类号： G11B7/09
CPC分类号： G11B7/094
摘要： The optical disk apparatus of this invention is provided with a memory for memorizing a track offset signal corresponding to an angle of a galvanic mirror, or a photodetector having two pairs of photodetecting regions to detect different tracking error signals to each other, or two galvanic mirrors which are adjusted so as to prevent the track offset signal.
摘要翻译：本发明的光盘装置设置有用于存储对应于电流反射镜的角度的光道偏移信号的存储器或具有两对光电检测区域的光电检测器，以检测彼此的不同跟踪误差信号，或两个电反射镜其被调整以防止轨道偏移信号。

2. 发明授权

US06667943B1 Optical disc apparatus 失效
标题翻译：光盘装置
公开(公告)号：US06667943B1
公开(公告)日：2003-12-23
申请号：US09553854
申请日：2000-04-21
申请人： Koichi Maruyama , Hisashi Konno , Suguru Takishima , Wataru Kubo , Hiroshi Nishikawa , Hiroshi Yamamoto
发明人： Koichi Maruyama , Hisashi Konno , Suguru Takishima , Wataru Kubo , Hiroshi Nishikawa , Hiroshi Yamamoto
IPC分类号： G11B700
CPC分类号： G11B7/1275 , G11B7/1353 , G11B7/1374 , G11B7/13922 , G11B2007/0006
摘要： An optical disc apparatus includes a fixed portion having a light source portion and a movable portion that holds an objective lens and moves along a radial direction of an optical disc. The fixed portion includes the light source portion for selectively emitting short and long wavelength laser beams, and a collimator lens for collimating the laser beams. The objective lens includes a positive refractive lens and a diffractive lens structure formed on a surface of the refractive lens. The diffractive lens structure has wavelength dependence such that spherical aberration varies in the undercorrected direction as wavelength of incident light increases. The objective lens converges the short wavelength laser beam of a predetermined diffraction order onto an informatlon layer of a thin cover type optical disc, and converges the long wavelength laser beam of the identical diffraction order onto an information layer of a thick cover type optical disc.
摘要翻译：光盘装置包括具有光源部分和保持物镜并沿着光盘的径向方向移动的可动部分的固定部分。固定部分包括用于选择性地发射短波长和长波长激光束的光源部分和用于准直激光束的准直透镜。物镜包括形成在折射透镜的表面上的正折射透镜和衍射透镜结构。衍射透镜结构具有波长依赖性，使得随着入射光的波长的增加，球面像差在校正不正确的方向上变化。物镜将预定衍射级的短波长激光束会聚到薄盖型光盘的信息层上，并将相同衍射级的长波长激光束会聚到厚盖型光盘的信息层上。

3. 发明授权

US5553052A Inclination of an objective lens in an optical information system 失效
标题翻译：物镜在光学信息系统中的倾斜
公开(公告)号：US5553052A
公开(公告)日：1996-09-03
申请号：US204655
申请日：1994-08-02
申请人： Masahiro Oono , Hisashi Konno , Toshiyuki Kase , Katsuki Hayashi , Hiroshi Nishikawa
发明人： Masahiro Oono , Hisashi Konno , Toshiyuki Kase , Katsuki Hayashi , Hiroshi Nishikawa
IPC分类号： G11B7/095 , G11B7/22 , G11B11/105 , G11B7/00 , G02B7/00
CPC分类号： G11B7/0956 , G11B11/1055 , G11B7/22
摘要： A detecting apparatus which detects an inclination of an objective lens relative to a reference surface is provided. The objective lens is part of an optical data recording and reproducing apparatus in which data is optically recorded on and reproduced from a recording medium which is placed parallel to the reference surface. The apparatus includes a transparent parallel plate which is opposite the objective lens, parallel to the reference surface, and made of a material that is substantially optically equivalent to a transparent material of the recording medium. The apparatus further includes a reflecting mechanism for reflecting coherent light which has passed through the objective lens and the transparent parallel plate back towards the transparent parallel plate and the objective lens, and a beam splitting mechanism for splitting the coherent light into a first beam and a second beam. The apparatus further includes a wavefront rotating mechanism for rotating the first beam and the second beam about an optical axis in a manner such that the first beam and the second beam are rotated through 180 degrees with respect to one another, and a mechanism for superposing the first beam and the second beam to produce an optical interference.
摘要翻译：提供一种检测物镜相对于基准面的倾斜度的检测装置。物镜是光学数据记录和再现装置的一部分，其中数据被光记录在与参考表面平行放置的记录介质上并再现。该装置包括与物镜相对的透明平行板，平行于参考表面，并且由基本上光学上相当于记录介质的透明材料的材料制成。该装置还包括反射机构，用于将已经通过物镜的相干光和透明平行板反射回透明平行板和物镜，以及分束机构，用于将相干光分解为第一光束和第二束。该装置还包括波前旋转机构，用于以第一光束和第二光束相对于彼此旋转180度的方式围绕光轴旋转第一光束和第二光束;以及机构，第一光束和第二光束产生光学干涉。

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