公开(公告)号：US08928845B2

公开(公告)日：2015-01-06

申请号：US11408187

申请日：2006-04-21

申请人： Nobuyuki Hashimoto

发明人： Nobuyuki Hashimoto

IPC分类号： G02F1/1343 ,  G11B7/139 ,  G11B7/1392 ,  G11B7/1369 ,  G02F1/29 ,  G11B7/00

CPC分类号： G11B7/13927 ,  G02F1/134309 ,  G02F1/29 ,  G11B7/1369 ,  G11B7/139 ,  G11B2007/0006

摘要： The present invention is directed to the provision of a liquid crystal optical element that can accurately change the numerical aperture of an objective lens regardless of variations in temperature or wavelength. The liquid crystal optical element comprises a first substrate, a second substrate, a liquid crystal provided between the first and second substrates, an electrode pattern formed on one of the first and second substrates and having an aperture control region, and an opposite electrode formed on the other one of the first and second substrates, the opposite electrode being opposed to the electrode pattern for applying a voltage therebetween, wherein a plurality of electrodes, for changing refractive index and thereby causing the incident light passing through the aperture control region to diverge, are formed in the aperture control region.

摘要翻译： 本发明涉及提供一种能够精确地改变物镜的数值孔径而不管温度或波长的变化的液晶光学元件。 液晶光学元件包括第一基板，第二基板，设置在第一和第二基板之间的液晶，形成在第一和第二基板中的一个上并具有开口控制区域的电极图案，以及形成在 第一和第二基板中的另一个，相对电极与电极图案相对，用于在其间施加电压，其中多个电极用于改变折射率，从而使通过孔径控制区域的入射光发散， 形成在孔径控制区域中。

公开(公告)号：US20050163015A1

公开(公告)日：2005-07-28

申请号：US11038418

申请日：2005-01-21

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/135 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/1392

CPC分类号： G11B7/1367 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： A combination of an object lens designed to appropriately converge a light beam L3 on a recording surface of a Blu-ray Disc, and an optical element which gives a phase difference distribution to a light beam L2 but does not give a phase difference distribution to the light beam L3, is provided. Another combination of an object lens designed to appropriately converge the light beam L3 on a recording surface of another optical disc, and an optical element which gives a phase difference distribution to a light beam L1 but does not give a phase difference distribution to the light beam L3, is provided. By the two combinations, information is recorded or reproduced, with respect to four types of recording media, which is a CD, a DVD, the Blu-ray Disc, and said another optical disc.

摘要翻译： 被设计为适当地会聚在蓝光盘的记录表面上的光束L 3的物镜的组合和向光束L 2给出相位差分布但不给出相位差分布的光学元件 提供给光束L 3。 设计成将光束L 3适当地会聚在另一光盘的记录表面上的物镜的另一组合，以及向光束L 1给出相位差分布但不给予相位差分布的光学元件 光束L 3。 通过这两种组合，关于作为CD，DVD，蓝光光盘和所述另一光盘的四种类型的记录介质来记录或再现信息。

公开(公告)号：US20050135220A1

公开(公告)日：2005-06-23

申请号：US10967504

申请日：2004-10-18

申请人： Ryuichi Katayama

发明人： Ryuichi Katayama

IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G11B7/1356 ,  G11B7/1369 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/1392 ,  G11B7/1395

CPC分类号： G11B7/1369 ,  G11B7/1356 ,  G11B7/1378 ,  G11B7/139 ,  G11B7/13925 ,  G11B7/1395 ,  G11B2007/0006

摘要： There is disclosed an optical head apparatus and an optical information recording or reproducing apparatus capable of obtaining a high light output at a recording time, and a high S/N at a reproducing time with respect to any of disks of next-generation, DVD, and CD standards. Light having a wavelength of 400 nm emitted from a semiconductor laser is almost all reflected by a beam splitter, and condensed on a disk of the next-generation standard. Light having a wavelength of 660 nm emitted from a semiconductor laser is almost all reflected by a beam splitter, almost all transmitted through the beam splitter, and condensed on the disk of the DVD standard. Light having a wavelength of 780 nm emitted from a semiconductor laser is almost all reflected by a beam splitter, almost all transmitted through the beam splitters and condensed on the disk of the CD standard. Reflected light from the disk is almost all transmitted through the beam splitters and received by a photodetector.

摘要翻译： 公开了一种能够在记录时间获得高光输出的光头装置和光信息记录或再现装置，以及相对于下一代DVD的任何盘的再现时间的高S / N， 和CD标准。 从半导体激光器发射的具有400nm波长的光几乎全部被分束器反射，并在下一代标准的盘上聚光。 从半导体激光器发射的具有660nm的波长的光几乎全部由分束器反射，几乎全部通过分束器传输，并且在DVD标准的盘上被冷凝。 从半导体激光器发射的具有780nm波长的光几乎全部由分束器反射，几乎全部通过分束器透射并在CD标准的盘上被冷凝。 来自盘的反射光几乎全部通过分束器透射并被光电检测器接收。

公开(公告)号：US20120057448A1

公开(公告)日：2012-03-08

申请号：US13318722

申请日：2011-03-07

申请人： Kiyotaka Ito ,  Yasumori Hino ,  Naoyasu Miyagawa ,  Atsushi Nakamura

发明人： Kiyotaka Ito ,  Yasumori Hino ,  Naoyasu Miyagawa ,  Atsushi Nakamura

IPC分类号： G11B7/125 ,  G11B7/139

CPC分类号： G11B7/00456 ,  G11B7/0062

摘要： A writing method according to the present invention is a method for writing a data sequence as a combination of marks and spaces on an information recording medium by condensing a laser beam through a lens. The writing method is characterized in that a cooling pulse for recording a mark that is even shorter than the limit of optical resolution of the laser beam and another cooling pulse for recording a mark that is still longer than the limit of the optical resolution of the laser beam are applied under mutually different conditions.

摘要翻译： 根据本发明的写入方法是通过将激光束通过透镜聚焦来将数据序列作为标记和间隔的组合写入信息记录介质的方法。 写入方法的特征在于，用于记录比激光束的光学分辨率的极限更短的标记的冷却脉冲和用于记录比激光的光学分辨率的极限更长的标记的另一个冷却脉冲 光束在相互不同的条件下施加。

公开(公告)号：US20050249064A1

公开(公告)日：2005-11-10

申请号：US11121087

申请日：2005-05-04

申请人： Tohru Kimura ,  Katsuya Sakamoto

发明人： Tohru Kimura ,  Katsuya Sakamoto

IPC分类号： G02B5/18 ,  G11B7/00 ,  G11B7/135 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/139 ,  G11B7/1392

CPC分类号： G11B7/13922 ,  G11B7/1353 ,  G11B7/1369 ,  G11B7/139 ,  G11B2007/0006

摘要： An optical pick-up apparatus comprising: a first light source emitting a the first light flux; a second light source emitting a second light flux; a third light source emitting a third light flux; and an optical element, wherein the optical element has a first optical surface having a first area including an optical axis of the optical element, and a second area positioned outside the first area, the second area includes a light-shielding structure being capable of substantially shielding the third light flux and being capable of transmitting the first light flux and the second light flux.

摘要翻译： 一种光学拾取装置，包括：发射第一光束的第一光源; 发射第二光束的第二光源; 发射第三光束的第三光源; 以及光学元件，其中所述光学元件具有第一光学表面，所述第一光学表面具有包括所述光学元件的光轴的第一区域和位于所述第一区域外部的第二区域，所述第二区域包括能够基本上 屏蔽第三光束并能够传输第一光通量和第二光通量。

公开(公告)号：US11475917B2

公开(公告)日：2022-10-18

申请号：US16963575

申请日：2019-10-23

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Yoshiaki Komma ,  Yasushi Kobayashi ,  Kazuhiro Minami

IPC分类号： G11B7/139 ,  G11B7/1374 ,  G02B13/18 ,  G11B7/0045

摘要： Provided is an objective lens which is used so that more information can be accumulated in a large-capacity optical disk and which has a further enhanced numerical aperture NA. The objective lens is a single lens having the numerical aperture NA and a refractive index n, and is configured so as to satisfy: NA≥0.91 and 1.61≤n

公开(公告)号：US11430479B2

公开(公告)日：2022-08-30

申请号：US16963575

申请日：2019-10-23

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Yoshiaki Komma ,  Yasushi Kobayashi ,  Kazuhiro Minami

IPC分类号： G11B7/139 ,  G11B7/1374 ,  G02B13/18 ,  G11B7/0045

摘要： Provided is an objective lens which is used so that more information can be accumulated in a large-capacity optical disk and which has a further enhanced numerical aperture NA. The objective lens is a single lens having the numerical aperture NA and a refractive index n, and is configured so as to satisfy: NA≥0.91 and 1.61≤n

公开(公告)号：US08854939B2

公开(公告)日：2014-10-07

申请号：US14005386

申请日：2012-03-16

申请人： Ryutaro Futakuchi ,  Shigeru Furumiya

发明人： Ryutaro Futakuchi ,  Shigeru Furumiya

IPC分类号： G11B7/00 ,  G11B7/1263 ,  G11B7/1374 ,  G11B7/1387 ,  G11B7/09 ,  G11B7/139 ,  G11B7/1372

CPC分类号： G11B7/1263 ,  G11B7/0908 ,  G11B7/1374 ,  G11B7/1387 ,  G11B7/139 ,  G11B2007/13727

摘要： An optical disk apparatus has: a laser (14) that outputs light; an optical system that includes an SIL (2) for forming a predetermined sized beam spot on an optical disk (1) using the light from the laser; a detector (26) that detects output power of the laser and generates a laser power detection signal; a laser power control circuit (27) that controls the output power of the laser using the laser power detection signal; a detector (10) that detects a gap length between the optical disk and the SIL and generates a gap detection signal; and a gap control circuit (15) that controls the gap length between the optical disk and the SIL using the gap detection signal. The power control circuit has a gain crossover frequency greater than a gain crossover frequency of the gap control circuit.

摘要翻译： 光盘装置具有：输出光的激光器（14）; 光学系统，其包括用于使用来自激光器的光在光盘（1）上形成预定尺寸的光束点的SIL（2） 检测器（26），其检测激光器的输出功率并产生激光功率检测信号; 激光功率控制电路（27），其使用所述激光功率检测信号来控制所述激光器的输出功率; 检测器（10），其检测光盘和SIL之间的间隙长度，并产生间隙检测信号; 以及间隙控制电路（15），其使用间隙检测信号来控制光盘和SIL之间的间隙长度。 功率控制电路具有大于间隙控制电路的增益交叉频率的增益交叉频率。

公开(公告)号：US09310536B2

公开(公告)日：2016-04-12

申请号：US13778153

申请日：2013-02-27

申请人： Panasonic Corporation

发明人： Katsuhiko Hayashi ,  Yasuhiro Tanaka ,  Michihiro Yamagata ,  Yoshiaki Komma

IPC分类号： G02B5/18 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/1392 ,  G11B7/1376 ,  G11B7/00

CPC分类号： G02B5/1876 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： An objective lens element having excellent compatibility with optical discs having different base material thicknesses is provided. The objective lens element has optically functional surfaces on an incident side and an exit side. At least either one of the optically functional surfaces on the incident side and the exit side includes a diffraction portion which satisfies at least either one of the following formulas (1) and (2): θ1×θ2

摘要翻译： 提供了具有与具有不同基底材料厚度的光盘的良好兼容性的物镜元件。 物镜元件在入射侧和出射侧具有光学功能表面。 入射侧和出射侧的光学功能表面中的至少任一方包括满足下述式（1）和（2）中的至少一个的衍射部：＆lt; 1＆gt; 2＆lt; 0（“ ד表示乘法）（1），（sin＆hetas; 2）/λ2= - （sin＆hetas; 1）/λ1（2），其中θ是具有提供最大值的衍射级的光束的衍射角 在波长λ1下的衍射效率和＆amp; Thetas; 2是具有在波长λ2下提供最大衍射效率的衍射级的光束的衍射角。

公开(公告)号：US20050224693A1

公开(公告)日：2005-10-13

申请号：US11100387

申请日：2005-04-07

申请人： Kiyono Ikenaka ,  Tatsuji Kurogama ,  Mika Wachi

发明人： Kiyono Ikenaka ,  Tatsuji Kurogama ,  Mika Wachi

IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B7/1392 ,  G02B7/04 ,  G01V8/00

CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/139 ,  G11B2007/0006

摘要： An optical pickup apparatus includes: a first light source for emitting a first light flux with a wavelength λ1 for recording and/or reproducing information on a first optical disc having a protective substrate with a thickness t1; a third light source for emitting a third light flux with a wavelength λ3 for recording and/or reproducing information on a third optical disc having a protective substrate with a thickness t3; and an objective lens arranged in a common optical path of the first light flux and the third light flux when the optical pickup apparatus records and/or reproduces information on each of the first and third optical discs, wherein the first light flux enters into the objective lens as a converging light flux, and a magnification m3 of the objective lens for a third light flux satisfies − 1/10≦m3

摘要翻译： 光拾取装置包括：第一光源，用于发射具有波长λ1的第一光通量，用于在具有厚度为t 1的保护基板的第一光盘上记录和/或再现信息; 第三光源，用于发射具有波长λ3的第三光通量，用于在具有厚度t 3的保护衬底的第三光盘上记录和/或再现信息; 以及当所述光学拾取装置在所述第一和第三光盘中的每一个上记录和/或再现信息时，布置在所述第一光束和所述第三光束的公共光路中的物镜，其中所述第一光通量进入所述目标 透镜作为会聚光束，并且用于第三光通量的物镜的倍率m 3满足-1 /10≤m3 <0。