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。

公开(公告)号：US5477386A

公开(公告)日：1995-12-19

申请号：US917324

申请日：1992-07-23

申请人： Isao Okuda ,  Suguru Takishima ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

发明人： Isao Okuda ,  Suguru Takishima ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

IPC分类号： G02B5/04 ,  G11B7/135 ,  G02B7/18 ,  G02B13/10 ,  G02B27/10 ,  G11B7/12

CPC分类号： G11B7/1359 ,  G02B5/04

摘要： An optical system of an optical disc apparatus is disclosed for converging and projecting a bundle of rays emitted from a light source onto an optical disc. The optical system includes a collimating lens which collimates the bundle of rays emitted from the light source, two anamorphic prisms for shaping the cross section of the collimated bundle of rays transmitted through the collimating lens, and an objective lens which converges the bundle of rays shaped by the anamorphic prisms onto the optical disc. At least one of the anamorphic prisms is detachably mounted to an immovable body portion of the optical system.

摘要翻译： 公开了一种光盘装置的光学系统，用于会聚和投射从光源发射的光束到光盘上。 光学系统包括准直透镜，其准直从光源发射的光束，两个变形棱镜，用于对通过准直透镜透射的准直光束的横截面进行成形;以及物镜，会聚成束状的光束 通过变形棱镜到光盘上。 至少一个变形棱镜可拆卸地安装到光学系统的不动部分。

公开(公告)号：US5278401A

公开(公告)日：1994-01-11

申请号：US928408

申请日：1992-08-12

申请人： Suguru Takishima ,  Isao Okuda ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

发明人： Suguru Takishima ,  Isao Okuda ,  Masahiro Oono ,  Koichi Maruyama ,  Masato Noguchi

IPC分类号： G11B7/09 ,  G11B7/13 ,  G11B11/105 ,  G01J1/20 ,  G11B7/00

CPC分类号： G11B11/10597 ,  G11B11/10576 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/0943 ,  G11B7/131

摘要： A signal detecting apparatus in an optical disc apparatus having an objective lens which converges light emitted from a light source onto an optical disc and a condenser lens which converges light reflected by the optical disc and transmitted through the objective lens includes first and second light receiving elements, each having a light receiving surface located before or behind a convergence point on which the light reflected from the optical disc is converged when the objective lens is in a focal position. Each of the light receiving surfaces are split into at least four light receiving areas. The signal detecting apparatus also includes a means for calculating a sum of differences of outputs of the light receiving surfaces' inner light receiving areas, calculating a sum of differences of outputs of the light receiving surfaces' outer light receiving areas, and then calculating a difference of the sums of differences, so that a track error signal is output in accordance with the difference of sums of differences calculated by the calculating means.

摘要翻译： 在具有将从光源发射的光会聚到光盘上的物镜的光盘装置中的信号检测装置和会聚由光盘反射并透过物镜的光的聚光透镜包括第一和第二光接收元件 每个具有位于会聚点之前或之后的光接收表面，当物镜处于焦点位置时，从该光盘反射的光会聚在其上。 每个光接收表面被分成至少四个光接收区域。 信号检测装置还包括：计算受光面的内部光接收区域的输出的差的和的方式，计算受光面的外部光接收区域的输出的差的和，然后计算差 的差值之和，使得根据由计算装置计算的差值之差来输出轨道误差信号。

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。

公开(公告)号：US5337300A

公开(公告)日：1994-08-09

申请号：US818534

申请日：1992-01-09

申请人： Suguru Takishima ,  Toshiyuki Kase

发明人： Suguru Takishima ,  Toshiyuki Kase

IPC分类号： G11B7/005 ,  G11B7/09 ,  G11B7/135 ,  G11B11/10 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G11B11/10515 ,  G11B11/10543 ,  G11B7/005

摘要： A signal sensing device is provided that includes an optical system having a first splitting function by which a beam reflected by a magneto-optic disk is split by a small amount, a second splitting function by which the beam is split into a P-polarized-component and an S-polarized-component, and a third splitting function by which the beam is split into a first optical path and a second optical path. The second splitting function is carried out by an optical element carrying out one of the first and third splitting functions. A first photo sensor is provided with a beam receiving area divided into four parts, and an undivided beam receiving area, and a second photo sensor is provided with a beam receiving area divided into two parts and an undivided beam receiving area. The beam receiving divided area of the first photo sensor receives the P-polarized-component and senses a focusing error signal, and the beam receiving divided area of the second photo sensor receives the S-polarized-component and senses a tracking error signal. The beam receiving undivided areas of the first and second photo sensors are provided for sensing an information record signal.

摘要翻译： 提供了一种信号感测装置，其包括具有第一分离功能的光学系统，由磁光盘反射的光束通过该光学系统分割少量，第二分割功能，通过该第二分割功能将光束分裂成P偏振光， 分量和S偏振分量，以及第三分割功能，通过该功能将光束分成第一光路和第二光路。 第二分割功能由执行第一和第三分割功能之一的光学元件执行。 第一光传感器设置有分为四部分的光束接收区域和不分光束接收区域，第二光传感器设置有被分成两部分的光束接收区域和不分光束接收区域。 第一光传感器的光束接收分割区域接收P偏振分量并感测聚焦误差信号，并且第二光传感器的光束接收分割区域接收S偏振分量并感测跟踪误差信号。 接收第一和第二光传感器的未分割区域的光束用于感测信息记录信号。

公开(公告)号：US6018393A

公开(公告)日：2000-01-25

申请号：US899721

申请日：1997-07-24

申请人： Suguru Takishima ,  Toshiyuki Kase

发明人： Suguru Takishima ,  Toshiyuki Kase

IPC分类号： G01M11/02 ,  G01B9/02

CPC分类号： G01M11/0271

摘要： An lens evaluating system for evaluating a dual-focus lens is disclosed. The lens evaluating system is provided with an interferometer to form an image of interference fringes and a masking system which masks a part of the image corresponding to a noise component.

摘要翻译： 公开了一种用于评估双焦点透镜的透镜评估系统。 透镜评估系统设置有干涉仪以形成干涉条纹的图像，以及遮蔽对应于噪声分量的图像的一部分的掩蔽系统。

公开(公告)号：US5309423A

公开(公告)日：1994-05-03

申请号：US929535

申请日：1992-08-14

申请人： Masato Noguchi ,  Isao Okuda ,  Suguru Takishima

发明人： Masato Noguchi ,  Isao Okuda ,  Suguru Takishima

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B11/10543

摘要： A reflected light beam from a magneto-optic disk is reflected by a first and second reflective element toward a signal detecting system. The first reflective element reflects the reflected light from the magneto-optic disk and gives a phase difference into the light beam. The second reflective element reflects the reflected light by the first reflective element toward the signal detecting system, and gives a phase difference which has the same amount as the phase difference caused by the first reflective element, but with the inverse sign thereof.

摘要翻译： 来自磁光盘的反射光束被第一和第二反射元件反射向信号检测系统。 第一反射元件反射来自磁光盘的反射光，并给出光束的相位差。 第二反射元件将第一反射元件的反射光反射到信号检测系统，并且给出与由第一反射元件引起的相位差相同量的相位差，但是具有其相反的符号。

公开(公告)号：US5600494A

公开(公告)日：1997-02-04

申请号：US571514

申请日：1995-12-13

申请人： Wataru Kubo ,  Koichi Maruyama ,  Suguru Takishima

发明人： Wataru Kubo ,  Koichi Maruyama ,  Suguru Takishima

IPC分类号： G02B13/18 ,  G11B7/135

CPC分类号： G11B7/1374 ,  G02B13/18 ,  G11B7/13922 ,  G11B2007/13727

摘要： An objective lens system used in an optical system of an optical disk device. The objective lens system includes at least one lens element and converges light emitted from a light source onto a reflecting layer of an optical disk. The lens element has an offense against the sine condition OSC, and the optical disk has a substrate thickness T and a refractive index n. A ray of light exits the lens element and intersects an optical axis of the lens element at an angle .alpha.. The values of OSC, .alpha., n and T satisfy the following relationship for light rays that are incident on the objective lens system at distances from the optical axis of the objective lens system which are least equal to a predetermined percentage of an effective height of an aperture of the objective lens: ##EQU1## Accordingly, a spherical aberration of the optical system is corrected. An offense against the sine condition of only the objective lens is substantially coincident with a spherical aberration of the objective lens such that a coma of only the objective lens is corrected.

摘要翻译： 一种用于光盘装置的光学系统的物镜系统。 物镜系统包括至少一个透镜元件，并且将从光源发射的光会聚到光盘的反射层上。 透镜元件具有针对正弦条件OSC的挑战，并且光盘具有基板厚度T和折射率n。 光线离开透镜元件并以角度α与透镜元件的光轴相交。 OSC，α，n和T的值对于距离物镜系统的光轴入射到物镜系统的光线满足以下关系：最小等于预定百分比的有效高度 物镜的孔径：因此，校正光学系统的球面像差。 仅针对物镜的正弦状态的进攻基本上与物镜的球面像差一致，使得仅修正了物镜的彗差。

公开(公告)号：US5544144A

公开(公告)日：1996-08-06

申请号：US556829

申请日：1995-11-02

申请人： Suguru Takishima ,  Isao Okuda ,  Takashi Morita

发明人： Suguru Takishima ,  Isao Okuda ,  Takashi Morita

IPC分类号： G11B7/125 ,  G11B7/135 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G11B7/126 ,  G11B7/1359

摘要： An optical head structure, employed in an optical device, in which light radiated from a predetermined light source is projected onto a predetermined recording medium through a light splitting member is disclosed. Part of the light is directed to the outside of the light splitting member and converged so as to be detected by a predetermined light detecting member. The light directed to the outside of the light splitting member is reflected at a predetermined angle by a predetermined light reflecting member. Thus, it becomes possible to make the whole volume of the optical device smaller. Also, the number of parts required in the optical head structure can be decreased.

摘要翻译： 公开了一种在光学装置中使用的光学头结构，其中从预定光源辐射的光通过分光构件投影到预定的记录介质上。 光的一部分被引导到分光构件的外部并会聚，以便由预定的光检测构件检测。 指向分光构件外侧的光被预定的光反射构件以预定的角度反射。 因此，可以使光学装置的整体体积更小。 此外，可以减少光头结构中所需的部件数量。

公开(公告)号：US5617387A

公开(公告)日：1997-04-01

申请号：US782737

申请日：1991-10-28

申请人： Takashi Morita ,  Suguru Takishima ,  Isao Okuda

发明人： Takashi Morita ,  Suguru Takishima ,  Isao Okuda

IPC分类号： G11B7/08 ,  G02B26/08 ,  G11B7/09 ,  G11B7/12 ,  G11B7/135 ,  G11B7/22 ,  G11B11/105 ,  G11B7/00 ,  G02B5/30

CPC分类号： G02B26/0875 ,  G11B7/094 ,  G11B7/1365 ,  G11B7/22 ,  G11B11/10543 ,  G11B7/0901 ,  G11B7/12

摘要： In an optical system comprising a light source section consisting of a semiconductor laser and a collimator lens, an objective lens for focusing a light beam on an optical disk, a beam splitter for separating part of the light beam reflected from the optical disk, a condenser lens, and a photosensor for detecting the separated light beam to produce a focusing and a tracking error signal, a plane parallel plate is provided between the light source section and the beam splitter. By rotating the plane parallel plate with an adjusting mechanism, the light beam undergoes a parallel shift, so that the intensity distribution of light being incident on the objective lens is varied and a tracking offset due to a deviation of the optical axis of the output light from the light source section can be compensated for. The plane parallel plate may be disposed between the beam splitter and the condenser lens.

摘要翻译： 在包括由半导体激光器和准直透镜构成的光源部分的光学系统中，用于将光束聚焦在光盘上的物镜，用于分离从光盘反射的光束的一部分的分束器，冷凝器 透镜和用于检测分离的光束以产生聚焦和跟踪误差信号的光电传感器，在光源部分和分束器之间设置平面平行板。 通过用调整机构旋转平面平行板，光束经受平行移动，使得入射到物镜上的光的强度分布变化，并且由于输出光的光轴偏离引起的跟踪偏移 从光源部分可以补偿。 平面平行板可以设置在分束器和聚光透镜之间。