公开(公告)号：US08054729B2

公开(公告)日：2011-11-08

申请号：US12994967

申请日：2009-11-11

申请人： Yoshiaki Komma ,  Joji Anzai ,  Masahiko Tsukuda ,  Yasumori Hino

发明人： Yoshiaki Komma ,  Joji Anzai ,  Masahiko Tsukuda ,  Yasumori Hino

IPC分类号： G11B7/00

CPC分类号： G11B7/24038 ,  G11B7/005 ,  G11B7/09 ,  G11B7/13925 ,  G11B2007/0013

摘要： An optical recording medium and an optical information device that improve the quality of a servo signal and a reproduction signal. In the optical recording medium, when shape-wise thicknesses tr1, tr2, tr3, and tr4 of a cover layer (42), a first intermediate layer (43), a second intermediate layer (44), and a third intermediate layer (45) are respectively converted into thicknesses t1, t2, t3, and t4 of the respective corresponding layers each having a predetermined refractive index “no”, a defocus amount with respect to a layer having a refractive index nrα and a thickness trα (satisfying: 1≦α≦n (where α is a positive integer and n is an integer of 4 or more)), and a defocus amount with respect to a layer having the refractive index “no” and a thickness tα (satisfying: 1≦α≦n (where α is a positive integer and n is an integer of 4 or more)) are equal to each other. Further, the thicknesses t1, t2, t3, and t4 satisfy |t1−(t2+t3+t4)|≧1 μm, a difference between any two values of the thicknesses t1, t2, t3, and t4 is set to 1 μm or more, and |(t1+t2)−(t3+t4)|≧1 μm.

摘要翻译： 一种提高伺服信号的质量和再现信号的光学记录介质和光学信息设备。 在光记录介质中，当覆盖层（42），第一中间层（43），第二中间层（44）和第三中间层（45）的形状厚度tr1，tr2，tr3和tr4 ）分别转换为各自具有预定折射率“no”的相应层的厚度t1，t2，t3和t4，相对于具有折射率nrα和厚度trα的层（满足1＆lt; 1EE）的散焦量 ;α＆nlE; n（其中α是正整数，n是4以上的整数））和相对于具有折射率“no”的层的散焦量和厚度tα（满足1＆nlE;α＆nlE; n（其中α是正整数，n是4以上的整数））彼此相等。 另外，厚度t1，t2，t3，t4满足| t1〜t2（t3 + t4）|≥1μm，将厚度t1，t2，t3，t4的任意两个值之差设定为1μm 以上|（t1 + t2） - （t3 + t4）|≥1μm。

公开(公告)号：US08045426B2

公开(公告)日：2011-10-25

申请号：US12602718

申请日：2008-05-29

申请人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

发明人： Eishin Mori ,  Kousei Sano ,  Joji Anzai ,  Hideki Aikoh

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1376 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An object of the invention is to suppress an influence of a wavefront aberration which is generated at the time of correcting a third-order spherical aberration, and realize satisfactory information recording and/or reproducing. A collimator lens 4 corrects a third-order spherical aberration which is generated depending on the thickness of a light transmissive layer from a surface of a first optical information recording medium 30, corresponding to an optimal substrate thickness of a first objective lens 6, to an intended information recording surface, assuming that the light transmissive layer thickness of the first optical information recording medium 30 which minimizes a residual third-order spherical aberration at the time of incidence of parallel light into the first objective lens 6 is defined as the optimal substrate thickness of the first objective lens 6. The optimal substrate thickness of the first objective lens 6 is defined in such a manner that a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 farthest from the first objective lens 6 at the time of correcting the third-order spherical aberration, and a variation of a wavefront aberration which is generated on the information recording surface of the first optical information recording medium 30 closest to the first objective lens 6 at the time of correcting the third-order spherical aberration are set equal to each other.

摘要翻译： 本发明的目的是抑制在校正三次球面像差时产生的波前像差的影响，并且实现满意的信息记录和/或再现。 准直透镜4将与第一光学信息记录介质30的表面相对应的透光层的厚度相应于第一物镜6的最佳基板厚度的三次球面像差校正为 假设将平行光入射到第一物镜6中的残余三阶球面像差最小化的第一光学信息记录介质30的透光层厚度定义为最佳基板厚度 第一物镜6的最佳基板厚度被定义为使得在第一光信息记录介质30的信息记录表面上产生的波前像差的变化最远离第一物镜6的第一物镜6。 在校正三次球面像差时的物镜6，以及a 在校正三次球面像差时在最靠近第一物镜6的第一光学信息记录介质30的信息记录表面上产生的波前像差的变化被设置为彼此相等。

公开(公告)号：US20110170394A1

公开(公告)日：2011-07-14

申请号：US13001192

申请日：2010-04-14

申请人： Yoshiaki Komma ,  Joji Anzai ,  Masahiko Tsukuda ,  Yasumori Hino

发明人： Yoshiaki Komma ,  Joji Anzai ,  Masahiko Tsukuda ,  Yasumori Hino

IPC分类号： G11B7/24 ,  G11B7/0037 ,  G06F17/50 ,  G06F17/10

CPC分类号： G11B7/24038 ,  G11B7/0037 ,  G11B7/08511 ,  G11B7/26 ,  G11B2007/0013 ,  Y10T29/49

摘要： An object of the invention is to improve the quality of a servo signal and a reproduction signal. Shape-wise thicknesses tr1, tr2, . . . , and trN of a cover layer and first through (N−1)-th intermediate layers of an optical recording medium having refractive indexes nr1, nr2, . . . , and nrN are converted into thicknesses t1, t2, . . . , and tN of the respective layers having a predetermined refractive index “no” which makes a divergent amount equal to a divergent amount of a light beam resulting from the thicknesses tr1, tr2, . . . , and trN, a difference DFF between the sum of a thickness “ti” through a thickness “tj”, and the sum of a thickness “tk” through a thickness “tm” is set to 1 μm or more (where i, j, k, and m are each any positive integer satisfying i≦j

摘要翻译： 本发明的目的是提高伺服信号的质量和再现信号。 形状厚度tr1，tr2，。 。 。 ，以及具有折射率nr1，nr2的光学记录介质的第一至第（N-1）个中间层的覆盖层和trN。 。 。 ，nrN转换为厚度t1，t2。 。 。 ，并且具有预定折射率“no”的各层的tN，其使得等于由厚度tr1，tr2导致的光束的发散量的发散量。 。 。 和trN，厚度“ti”与厚度“tj”的和之和与厚度“tk”之间的厚度“tm”之和的差DFF被设定为1μm以上（其中，i，j ，k和m分别是满足i＆nlE; j

公开(公告)号：US20100214891A1

公开(公告)日：2010-08-26

申请号：US12681457

申请日：2008-10-02

申请人： Joji Anzai ,  Kousei Sano ,  Eishin Mori ,  Hideki Aikoh ,  Hirotaka Ueno

发明人： Joji Anzai ,  Kousei Sano ,  Eishin Mori ,  Hideki Aikoh ,  Hirotaka Ueno

IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B19/00

CPC分类号： G11B7/131 ,  G11B7/1275 ,  G11B2007/0006

摘要： A first light source 1a emits a first light flux with a first wavelength. A second light source 1b emits a second light flux with a second wavelength that is different from the first wavelength and a third light flux with a third wavelength that is different from the first wavelength and the second wavelength. A collimator lens 6, a first objective lens 9, and a second objective lens 10 collect the first to third light fluxes as converged light on an optical disc. A first composite photodetector 13 detects the reflected light fluxes from the optical disc. The first composite photodetector 13 includes a first quartered light-receiving unit 13a that receives a light flux obtained by reflection of at least one light flux from among the first to third light fluxes from the optical disc and a second quartered light-receiving unit 13b that receives a light flux obtained by reflection of the remaining light fluxes from the optical disc. Such configuration ensures compatibility with optical discs of at least three kinds and enables miniaturization.

摘要翻译： 第一光源1a发射具有第一波长的第一光通量。 第二光源1b发射具有不同于第一波长的第二波长的第二光束和具有不同于第一波长和第二波长的第三波长的第三光束。 准直透镜6，第一物镜9和第二物镜10将第一至第三光束作为会聚光收集在光盘上。 第一复合光电检测器13检测来自光盘的反射光束。 第一复合光电检测器13包括第一四分之一的光接收单元13a，其接收从来自光盘的第一至第三光束中的至少一个光通量的反射获得的光束和第二四分之一的光接收单元13b， 接收通过从光盘反射剩余光束而获得的光通量。 这样的配置确保与至少三种的光盘的兼容性，并且能够实现小型化。

公开(公告)号：US07778140B2

公开(公告)日：2010-08-17

申请号：US11905923

申请日：2007-10-05

申请人： Kousei Sano ,  Takayuki Nagata ,  Hideki Aikoh ,  Joji Anzai ,  Fumitomo Yamasaki

发明人： Kousei Sano ,  Takayuki Nagata ,  Hideki Aikoh ,  Joji Anzai ,  Fumitomo Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0901 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0013

摘要： An offset-free tracking signal enables stable tracking control even if an optical disc is a multi-layer disc having three or more layers. Light receiving portions of a main region light receiving portion group are arranged between a projection line of a third dividing line on a photodetector and a projection line of a fourth dividing line on the photodetector by stray lights from information layers adjacent to the one, on which a light beam is focused, out of a plurality of information layers. Further, light receiving portions of a subregion light receiving portion group is arranged between a projection line of a first dividing line on a photodetector and a projection line of a second dividing line on the photodetector by the stray lights from the information layers adjacent to the one, on which a light beam is focused, out of the plurality of information layers.

摘要翻译： 无偏移跟踪信号即使光盘是具有三层或更多层的多层盘也能实现稳定的跟踪控制。 主区域光接收部分组的光接收部分布置在光电检测器上的第三分割线的投影线与光电检测器上的第四分割线的投影线之间，与来自与其相邻的信息层的杂散光 在多个信息层中聚焦光束。 此外，子区域光接收部分组的光接收部分被布置在光电检测器上的第一分割线的投影线和光电检测器上的第二分割线的投影线之间， 在多个信息层中聚焦光束。

公开(公告)号：US07778135B2

公开(公告)日：2010-08-17

申请号：US11659034

申请日：2005-08-05

申请人： Joji Anzai ,  Shinichi Kadowaki ,  Osamu Kajino ,  Masanari Mohri

发明人： Joji Anzai ,  Shinichi Kadowaki ,  Osamu Kajino ,  Masanari Mohri

IPC分类号： G11B7/20 ,  G11B3/70

CPC分类号： G11B7/248 ,  G11B7/24 ,  G11B7/2463 ,  G11B7/249 ,  G11B2007/0013

摘要： The present invention provides an optical information medium capable of suppressing the influence of reflection light from an unnecessary information recording face and effectively eliminating spherical aberration at the time of recording/reproducing information to/from a recording medium having a plurality of information recording faces. When reflectance of an information recording face is αh and transmittance between information recording faces is th, αh and th of the optical information medium are set so as to satisfy ((α(h−1)2×α(h−2))/(th2×αh))

摘要翻译： 本发明提供了一种能够抑制来自不需要的信息记录面的反射光的影响的光信息介质，并且在从具有多个信息记录面的记录介质记录/再现信息时有效地消除了球面像差。 当信息记录面的反射率为αh且信息记录面之间的透射率为th时，光信息介质的αh和th被设定为满足（（α（h-1）2×α（h-2））/ （th2×αh））<0.01。

公开(公告)号：US20100143637A1

公开(公告)日：2010-06-10

申请号：US12580721

申请日：2009-10-16

申请人： Yoshiaki KOMMA ,  Joji Anzai ,  Hiroyasu Inoue ,  Takashi Kikukawa ,  Koji Mishima ,  Jun Nakano ,  Manami Miyawaki ,  Shigeki Takagawa

发明人： Yoshiaki KOMMA ,  Joji Anzai ,  Hiroyasu Inoue ,  Takashi Kikukawa ,  Koji Mishima ,  Jun Nakano ,  Manami Miyawaki ,  Shigeki Takagawa

IPC分类号： B32B3/02 ,  G11B7/26

CPC分类号： G11B7/24038 ,  G11B7/1376 ,  G11B7/13925 ,  Y10T428/21

摘要： An object of the invention is to provide an optical recording medium and a method for producing an optical recording medium that enable to improve the quality of a servo signal and a reproduction signal. The optical recording medium satisfies: t3−t4≧1 μm, t4−t2≧1 μm, t2≧10 μm, and t1−(t2+t3+t4)≧1 μm, where t1 is a thickness between a surface of the optical recording medium, and the first information recording surface, t2 is a thickness between the first optical recording surface and the second information recording surface, t3 is a thickness between the second optical recording surface and the third information recording surface, and t4 is a thickness between the third optical recording surface and the fourth information recording surface.

摘要翻译： 本发明的目的是提供一种能够提高伺服信号和再现信号的质量的光学记录介质和光学记录介质的制造方法。 光记录介质满足：t3-t4≥1μm，t4-t2≥1μm，t2≥10μm，t1-（t2 + t3 + t4）≥1μm，其中t1是光学表面之间的厚度 记录介质，第一信息记录表面，t2是第一光学记录表面和第二信息记录表面之间的厚度，t3是第二光学记录表面和第三信息记录表面之间的厚度，t4是 第三光学记录表面和第四信息记录表面。

公开(公告)号：US07656775B2

公开(公告)日：2010-02-02

申请号：US11272822

申请日：2005-11-15

申请人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

发明人： Eishin Mori ,  Akihiro Arai ,  Fumitomo Yamasaki ,  Joji Anzai

IPC分类号： G11B7/135 ,  G11B7/00 ,  G11B7/20

CPC分类号： G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13925 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical head that is restrained from becoming larger, even if it is used for an optical-information recording medium that includes a plurality of information recording layers. In this optical head, a collimating lens is formed by a concave lens disposed on the side of a light source and a convex lens disposed on the side of an objective lens. A collimating-lens actuator moves the convex lens in a direction where a spherical aberration is cancelled which is generated according to the thickness of a light transmission layer up to an information recording layer of the optical-information recording medium. An aperture stop is provided on the side of the collimating lens with respect to the objective lens, and the aperture stop is located near the focal position of the convex lens on the side of the objective lens.

摘要翻译： 即使将其用于包含多个信息记录层的光学信息记录介质，也被抑制得越来越大。 在该光学头中，准直透镜由设置在光源侧的凹透镜和设置在物镜侧的凸透镜形成。 准直透镜致动器沿着光传输层的厚度直到光信息记录介质的信息记录层产生的球面像差被消除的方向移动凸透镜。 在准直透镜相对于物镜的一侧设置孔径光阑，孔径光阑位于物镜侧的凸透镜的焦点附近。

公开(公告)号：US20090262630A1

公开(公告)日：2009-10-22

申请号：US12089737

申请日：2006-10-19

申请人： Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Takayuki Nagata

发明人： Joji Anzai ,  Hideki Aikoh ,  Eishin Mori ,  Takayuki Nagata

IPC分类号： G11B7/135

CPC分类号： G11B7/126 ,  G11B2007/0013

摘要： An optical controller includes a light source for emitting light, an object lens for condensing light emitted from the light source, a light detection unit for receiving light reflected on an optical information recording medium and outputting a signal corresponding to the amount of the light, and a laser control unit for controlling the amount of the light emitted from the light source to the information recording surface on which information is to be recorded or reproduced, based on the recording state of an information recording surface disposed closer to the object lens than an information recording surface on which the information is to be recorded or reproduced.

摘要翻译： 光控制器包括用于发光的光源，用于聚集从光源发出的光的物镜;光检测单元，用于接收在光信息记录介质上反射的光并输出与​​光量对应的信号;以及 激光控制单元，用于基于比信息更靠近物体设置的信息记录表面的记录状态来控制从光源发射到信息记录表面上的信息的量的量，该信息记录表面将记录或再现信息 要在其上记录或再现信息的记录表面。

公开(公告)号：US08302119B2

公开(公告)日：2012-10-30

申请号：US12531601

申请日：2008-03-13

申请人： Masahiko Tsukuda ,  Morio Tomiyama ,  Kenji Narumi ,  Joji Anzai ,  Yuuko Tomekawa ,  Haruhiko Habuta

发明人： Masahiko Tsukuda ,  Morio Tomiyama ,  Kenji Narumi ,  Joji Anzai ,  Yuuko Tomekawa ,  Haruhiko Habuta

IPC分类号： G11B7/26 ,  G11B3/70

CPC分类号： G11B7/24038 ,  G11B7/2403

摘要： The recording/reproducing quality of a multilayer optical information recording medium deteriorate not only due to interference from other layers caused by light converging on other information layers but also due to stray light converging on the surface of a protective layer and stray light that does not converge on other information layers but rather returns to an optical head through the same optical path as the reproducing signal. The thickness composition of intermediate layers (106, 107, and 108) and the protective layer (109) in a four-layer optical information recording medium are set so as to eliminate the influence of interference caused by stray light from other layers reflected up to three times.

摘要翻译： 多层光学信息记录介质的记录/再现质量不仅由于聚光在其它信息层上而引起的其它层的干扰而劣化，而且还由于会聚在保护层的表面上的杂散光和不会聚的杂散光 在其他信息层上，而是通过与再现信号相同的光路返回到光头。 设置四层光学信息记录介质中的中间层（106,107,108）和保护层（109）的厚度组成，以消除由反射到其它层的杂散光引起的干扰的影响 三次。