公开(公告)号：US5745296A

公开(公告)日：1998-04-28

申请号：US648767

申请日：1996-05-16

申请人： Tetsuya Nakamura ,  Koichi Maruyama ,  Takashi Iizuka

发明人： Tetsuya Nakamura ,  Koichi Maruyama ,  Takashi Iizuka

IPC分类号： G02B26/12 ,  G02B27/10

CPC分类号： G02B26/123

摘要： Lens arrangements for a multibeam recording device include a first lens group that forms collimated beams paired with a second lens group, allowing the second lens group to be moved for focusing. A first lens group forms non-collimated beams is paired with a second lens group, allowing one lens group to be moved for magnification change. A first lens group forms non-collimated beams between internal portions and collimated beams leading to a second lens group, allowing magnification change by moving the two portions and focus change by moving the second lens group. A first lens group having two movable portions is paired with a second lens group, both movable portions being shiftable and tiltable to correct for decentering errors. Three concrete reduction lens system examples applicable in each of the embodiments use positive anomalous dispersion glass, allowing low dispersion and the use of blue LEDs to increase the imaging resolution.

摘要翻译： 用于多光束记录装置的透镜装置包括形成与第二透镜组成对的准直光束的第一透镜组，允许第二透镜组移动以进行聚焦。 形成非准直光束的第一透镜组与第二透镜组配对，允许一个透镜组移动以进行放大改变。 第一透镜组在内部部分和通过第二透镜组的准直光束之间形成非准直光束，通过移动两个部分并通过移动第二透镜组来聚焦变化来允许倍率变化。 具有两个可移动部分的第一透镜组与第二透镜组成对，两个可移动部分都是可移动和可倾斜的，以校正偏心误差。 适用于每个实施例的三个具体的减速透镜系统示例使用正异常色散玻璃，允许低色散和使用蓝色LED来增加成像分辨率。

公开(公告)号：US5657171A

公开(公告)日：1997-08-12

申请号：US527975

申请日：1995-09-14

申请人： Koichi Maruyama ,  Makoto Iwaki

发明人： Koichi Maruyama ,  Makoto Iwaki

IPC分类号： G02B27/00 ,  G11B7/135 ,  G02B9/04

CPC分类号： G11B7/1372 ,  G02B27/0025 ,  G11B7/1378 ,  G11B7/13922

摘要： An optical system of an optical information recording/reproducing apparatus including a light source, an objective lens, and a chromatic aberration correcting element is provided and also includes a mechanism for independently actuating the objective lens. A beam splitter for splitting the luminous flux reflected by a medium can also be provided. The chromatic aberration correcting element is formed of a positive lens and a negative lens cemented together and satisfies the relation .vertline.n.sub.p -n.sub.n .vertline..times.10.sup.-5

摘要翻译： 提供了包括光源，物镜和色像差校正元件的光学信息记录/再现设备的光学系统，并且还包括用于独立地致动物镜的机构。 还可以提供用于分离由介质反射的光通量的分束器。 色像差校正元件由正透镜和负透镜粘合在一起形成，满足关系| np-nn | x10-5 <300，其中正透镜使用的中心波长的折射率由np 负透镜的折射率由nn表示。

公开(公告)号：US5642223A

公开(公告)日：1997-06-24

申请号：US443558

申请日：1995-05-18

申请人： Sachio Hasushita ,  Shuji Yoneyama ,  Koichi Maruyama ,  Takayuki Ito

发明人： Sachio Hasushita ,  Shuji Yoneyama ,  Koichi Maruyama ,  Takayuki Ito

IPC分类号： G02B13/00 ,  G02B15/04 ,  G02B26/08 ,  G03B5/06 ,  G02B27/64

CPC分类号： G02B26/0875 ,  G02B13/00 ,  G02B15/04 ,  G03B5/06

摘要： A tilting lens system including a plurality of lens groups in which at least one lens group subsequent to a first lens group can be tilted about a predetermined point on a principal ray axis thereof.

摘要翻译： 一种倾斜透镜系统，包括多个透镜组，其中在第一透镜组之后的至少一个透镜组可以围绕其主射线轴上的预定点倾斜。

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：US5321550A

公开(公告)日：1994-06-14

申请号：US005187

申请日：1993-01-14

申请人： Koichi Maruyama ,  Makoto Iwaki

发明人： Koichi Maruyama ,  Makoto Iwaki

IPC分类号： G02B27/00 ,  G11B7/135 ,  G02B27/10 ,  G02B9/04

CPC分类号： G11B7/1372 ,  G02B27/0025 ,  G11B7/1378 ,  G11B7/13922

摘要： An optical system of an optical information recording/reproducing apparatus including a light source for emitting a generally parallel luminous flux; an objective optical system for converging the luminous flux emitted from the light source onto a medium; a beam splitter for splitting the luminous flux reflected by the medium from a light path directed to the light source and guiding the same to a light receiving system; a chromatic aberration correcting element having almost no power disposed between the objective lens and the beam splitter and adapted to correct a chromatic aberration of the objective lens; and means for independently actuating the objective lens at least in an optical axis direction thereof.

摘要翻译： 一种光信息记录/再现装置的光学系统，包括用于发射大致平行光通量的光源; 用于将从光源发射的光束会聚到介质上的物镜光学系统; 分束器，用于将由介质反射的光束从指向光源的光路分解并将其引导到光接收系统; 色差校正元件几乎没有设置在物镜和分束器之间并且适于校正物镜的色差的功率; 以及用于至少在其光轴方向独立地致动物镜的装置。

公开(公告)号：US5297114A

公开(公告)日：1994-03-22

申请号：US800846

申请日：1991-11-29

申请人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryoto Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki ,  Isao Takahashi

发明人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryoto Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki ,  Isao Takahashi

IPC分类号： G11B7/09 ,  G11B7/00

CPC分类号： G11B7/094

摘要： In the magneto-optic recording/reproduction apparatus, a light beam from a semiconductor laser that can be used with two wavelengths, for recording and reproduction is converged by an objective lens on a magneto-optic disk, a predetermined offset is added to this focusing error signal by an offset adjusting circuit, and the objective lens is driven in the direction of the optical axis based on the focusing error signal to which an offset was added.

摘要翻译： 在磁光记录/再现装置中，来自可用于记录和再现的两个波长的半导体激光器的光束被物镜会聚在磁光盘上，预定的偏移被加到该聚焦 通过偏移调整电路的误差信号，并且基于添加有偏移的聚焦误差信号，物镜在光轴的方向上被驱动。

公开(公告)号：US5280464A

公开(公告)日：1994-01-18

申请号：US741620

申请日：1991-08-07

申请人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

发明人： Tsuyoshi Itoh ,  Isao Okuda ,  Toshiyuki Kase ,  Hiroshi Nishikawa ,  Ryota Ogawa ,  Masahiro Oono ,  Koichi Maruyama ,  Makoto Iki

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

CPC分类号： G11B7/0909 ,  G11B7/1365 ,  G11B7/13922

摘要： An optical system of an optical disk apparatus having plural optical elements characterized in that the optical element having aberration which can counterbalance the wave front aberration of the whole optical system is disposed, or a direction of aberration of each existing optical element is adjusted in order to correct the wave front aberration.

摘要翻译： 具有多个光学元件的光盘装置的光学系统，其特征在于，具有能够抵消整个光学系统的波面像差的像差的光学元件被设置，或者调整每个现有光学元件的像差方向，以便 纠正波前像差。

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：US5173809A

公开(公告)日：1992-12-22

申请号：US769764

申请日：1991-10-04

申请人： Makoto Iwaki ,  Koichi Maruyama

发明人： Makoto Iwaki ,  Koichi Maruyama

IPC分类号： G02B13/18 ,  G02B13/24 ,  G02B27/00 ,  G11B7/135

CPC分类号： G11B7/1372 ,  G02B13/18 ,  G02B13/24 ,  G02B27/0025 ,  G11B7/1378

摘要： An object lens system consists of a converging lens which has both surfaces formed of a convex aspherical surface and having a radius of curvature which is increased as it goes toward the periphery from the center thereof, and a chromatic aberration correcting element having almost no power disposed towards said light source side of said converging lens and adapted to correct a chromatic aberration of said converging lens.

摘要翻译： 物镜系统由会聚透镜组成，其具有由凸非球面形成的两个表面，并且具有随其从其中心朝向周边而增加的曲率半径，以及几乎不具有功率的色像差校正元件 朝向所述会聚透镜的所述光源侧，并适于校正所述会聚透镜的色差。

公开(公告)号：US5087990A

公开(公告)日：1992-02-11

申请号：US535485

申请日：1990-06-11

申请人： Koichi Maruyama

发明人： Koichi Maruyama

IPC分类号： G02B13/00 ,  G02B13/24 ,  G02B27/30

CPC分类号： G02B13/24

摘要： A collimator lens for an erasable and re-recordable magneto-optical disk system comprising a first positive lens, a second positive lens and a third negative lens arranged from a light outgoing side in order. The second and third lenses are cemented together and the cemented lens has a positive power. A refractive index of the first lens n1 is lower than 1.686.

摘要翻译： 一种用于可擦除和可再记录的磁光盘系统的准直透镜，包括从光出射侧依次布置的第一正透镜，第二正透镜和第三负透镜。 第二和第三透镜胶合在一起，胶合透镜具有正的功率。 第一透镜n1的折射率低于1.686。