公开(公告)号：US08441907B2

公开(公告)日：2013-05-14

申请号：US13558465

申请日：2012-07-26

申请人： Yoshiaki Komma ,  Toshiyasu Tanaka ,  Fumitomo Yamasaki

发明人： Yoshiaki Komma ,  Toshiyasu Tanaka ,  Fumitomo Yamasaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G11B7/1353 ,  G11B7/13922 ,  G11B2007/0006

摘要： In an optical head device which performs recording/reading of data in/from a high-density optical disc using an objective lens with a large NA, a saw-tooth shape diffraction element is used for also performing recording/reading of data in/from a conventional optical disc, such as DVD, CD, or the like. A step difference that produces an optical path length for blue light which is equal to or longer than the wavelength of the blue light and optical path lengths for red and infrared light which are shorter than the wavelengths of the red and infrared light is utilized so as to exert an inverse action on the blue light to those exerted on the red and infrared light. The effect of increasing the working distances for CD and DVD enables multiple compatibility. The optical element is integrally combined with the objective lens to perform a tracking servo following operation.

摘要翻译： 在使用具有大NA的物镜的高密度光盘中进行数据的记录/读取的光学头装置中，使用锯齿形衍射元件也进行数据的记录/读取 常规的光盘，例如DVD，CD等。 使用等于或长于蓝光的波长的蓝色光的路径长度和比红色和红外光的波长短的红色和红色光的光路长度的阶差，被利用为 对蓝色光施加与红色和红色光上的那些相反的作用。 增加CD和DVD的工作距离的效果可以实现多种兼容性。 光学元件与物镜整体地组合以执行跟踪伺服跟随操作。

公开(公告)号：US08385169B2

公开(公告)日：2013-02-26

申请号：US11965469

申请日：2007-12-27

申请人： Yoshiaki Komma ,  Kanji Wakabayashi ,  Fumitomo Yamasaki ,  Toshiyasu Tanaka

发明人： Yoshiaki Komma ,  Kanji Wakabayashi ,  Fumitomo Yamasaki ,  Toshiyasu Tanaka

IPC分类号： G11B7/00

CPC分类号： G11B7/13925 ,  G11B7/1362 ,  G11B7/1376 ,  G11B7/1381 ,  G11B19/12 ,  G11B2007/0006

摘要： An optical disc type is determined by detecting focus error signals and an amount of returned light, while (i) emitting light having a wavelength maximizing a focal length and (ii) moving an objective lens in a direction of an optical axis. If an S shape and AS immediately after a surface are greater than those at the surface, the optical disc is determined to have a largest capacity. It is also determined whether there is a reflective layer at a depth equal or less than 0.1 mm, if not, then it is determined whether there is a reflective layer at a depth of 0.6 mm. If there is a reflective layer at the depth of 0.6 mm, then the type of the reflective layer is determined based on TE/RF signals, using blue light. If the blue light is not adaptable, red light is emitted to replay at a depth of 0.6 mm.

摘要翻译： 通过检测聚焦误差信号和返回光量来确定光盘类型，同时（i）发射具有最大化焦距的波长的光和（ii）沿光轴的方向移动物镜。 如果在表面之后立即形成S形和AS大于表面处的S形状和AS，则确定光盘具有最大的容量。 还确定在等于或小于0.1mm的深度处是否存在反射层，如果不是，则确定在0.6mm的深度是否存在反射层。 如果在0.6mm的深度处存在反射层，则使用蓝色光，基于TE / RF信号确定反射层的类型。 如果蓝光不适应，则会发出红光以0.6mm的深度重播。

公开(公告)号：US08320227B2

公开(公告)日：2012-11-27

申请号：US13014031

申请日：2011-01-26

申请人： Yoshiaki Komma ,  Kanji Wakabayashi ,  Kousei Sano ,  Toshiyasu Tanaka ,  Keiichi Matsuzaki ,  Hidenori Wada

发明人： Yoshiaki Komma ,  Kanji Wakabayashi ,  Kousei Sano ,  Toshiyasu Tanaka ,  Keiichi Matsuzaki ,  Hidenori Wada

IPC分类号： G11B7/135

CPC分类号： G11B7/1374 ,  G11B2007/0006

摘要： An objective lens unit according to the present invention includes a first objective lens 41; and a first lens holder 2 for supporting the first objective lens 41. The first lens holder 2 is formed of a material which transmits ultraviolet. Preferably, the first lens holder 2 includes a through-hole, having first and second openings 2a and 2b, through which light incident on the first objective lens 41 passes, and an opening limiting section 3 provided along a circumferential direction of the through-hole and projecting toward a central axis of the through-hole. The first objective lens 41 is supported so as to block the first opening 2b. The opening limiting section 3 guides light incident thereon from the second opening 2a in a direction away from an optical axis of the first objective lens.

摘要翻译： 根据本发明的物镜单元包括第一物镜41; 以及用于支撑第一物镜41的第一透镜保持器2.第一透镜保持器2由透射紫外线的材料形成。 优选地，第一透镜保持件2包括通孔，具有入射在第一物镜41上的光通过的第一和第二开口2a和2b以及沿着通孔的周向设置的开口限制部3 并朝向通孔的中心轴突出。 第一物镜41被支撑以阻挡第一开口2b。 开口限制部3在远离第一物镜的光轴的方向上引导从第二开口2a入射的光。

公开(公告)号：US08305864B2

公开(公告)日：2012-11-06

申请号：US13257380

申请日：2011-01-07

申请人： Yoshiaki Komma ,  Katsuhiko Hayashi ,  Fumitomo Yamasaki ,  Michihiro Yamagata

发明人： Yoshiaki Komma ,  Katsuhiko Hayashi ,  Fumitomo Yamasaki ,  Michihiro Yamagata

IPC分类号： G11B7/00

CPC分类号： G11B7/13922 ,  G11B7/1353 ,  G11B7/1374 ,  G11B7/1376 ,  G11B7/13925 ,  G11B2007/0006 ,  G11B2007/13727

摘要： A compound objective lens, an optical head device, an optical information device, and an information processing device that can inhibit the occurrence of aberration even when a light beam source wavelength shifts from the designed value. A diffraction structure having a sawtooth or stepwise cross section is formed in the region (R10) and region (R20). The height of the sawtooth or stepwise cross section formed in the region (R10) provides a light beam, which has a predetermined wavelength, with a difference in optical path length of N times the predetermined wavelength, as compared with a case of propagation in air. The height of the sawtooth or stepwise cross section formed in the region (R20) provides the light beam, which has the predetermined wavelength, with a difference in optical path length of J times the predetermined wavelength, as compared with a case of propagation in air. At least one of the difference in height between both ends of a boundary band (RB) provided between the region (R10) and the region (R20), and the width of the boundary band (RB) provides the light beam, which has the predetermined wavelength, with a difference in optical path length of (N+J)/2 times (N and J are mutually different natural numbers) the predetermined wavelength, as compared with a case of transmission in air.

摘要翻译： 复光物镜，光头装置，光信息装置和信息处理装置，即使当光束源波长从设计值偏移时也能够抑制像差的发生。 在区域（R10）和区域（R20）中形成具有锯齿状或阶梯状横截面的衍射结构。 与在空气中传播的情况相比，在区域（R10）中形成的锯齿状或阶梯状横截面的高度提供具有预定波长的光束，其具有N倍于预定波长的光程长度差 。 与在空气中传播的情况相比，在区域（R20）中形成的锯齿或逐步横截面的高度提供了具有预定波长的光束，其光路长度差为J倍于预定波长 。 设置在区域（R10）和区域（R20）之间的边界带（RB）的两端之间的高度差异和边界带（RB）的宽度中的至少一个高度提供了具有 与空气传播的情况相比，预定波长与（N + J）/ 2倍（N和J相互不同的自然数）的光程长度差异。

公开(公告)号：US08295150B2

公开(公告)日：2012-10-23

申请号：US13071914

申请日：2011-03-25

申请人： Kousei Sano ,  Yoshiaki Komma ,  Yasumori Hino

发明人： Kousei Sano ,  Yoshiaki Komma ,  Yasumori Hino

IPC分类号： G11B3/70 ,  G11B7/00 ,  B32B3/02 ,  G01B11/28 ,  G01B9/02

CPC分类号： G11B7/268 ,  G11B7/00375 ,  G11B2007/0013

摘要： Described is an optical information medium measurement method of measuring a degree of modulation in an optical information medium of a multilayered structure having a plurality of information layers. The method includes measuring the modulation degree of each layer of the optical information medium, by use of a measurement optical system, obtaining a thickness between layers of the optical information medium, obtaining a reflectance of each layer of the optical information medium, and converting the measured modulation degree of each layer into a modulation degree at a reference optical system differing from the measurement optical system, based on a value indicative of the obtained thickness between layers and a value indicative of the obtained reflectance of each layer.

摘要翻译： 描述了一种测量具有多个信息层的多层结构的光学信息介质中的调制度的光学信息介质测量方法。 该方法包括通过使用测量光学系统来测量光信息介质的每层的调制度，获得光信息介质的层之间的厚度，获得光信息介质的每一层的反射率，并将 基于指示层之间获得的厚度的值和表示所获得的各层反射率的值，将每层的测量调制度调整为与测量光学系统不同的参考光学系统的调制度。

公开(公告)号：US20120213052A1

公开(公告)日：2012-08-23

申请号：US13504602

申请日：2010-12-06

申请人： Fumitomo Yamasaki ,  Katsuhiko Hayashi ,  Yoshiaki Komma

发明人： Fumitomo Yamasaki ,  Katsuhiko Hayashi ,  Yoshiaki Komma

IPC分类号： G11B7/135

CPC分类号： G11B7/1353 ,  G11B7/1374 ,  G11B7/13922 ,  G11B2007/0013

摘要： Provided are an optical head capable of favorably recording or reproducing information to or from an information recording medium including a plurality of information recording surfaces, an optical disc device including the optical head, an information processing device including the optical disc, and an objective lens. The optical head (40) includes a blue-violet laser light source (1) which emits a blue-violet laser beam, an objective lens (8) which has an orbicular zone-shaped diffractive structure, and which diffracts the blue-violet laser beam and converges the generated diffracted light of n-th order (where n is a natural number) on a predetermined information recording surface of a multi-layer optical disc (60), and a light-receiving element (23) which receives the blue-violet laser beam reflected by the predetermined information recording surface, wherein the diffractive structure adds a positive power component and a spherical aberration component to the n-th order diffracted light.

摘要翻译： 提供了一种能够向包括多个信息记录表面的信息记录介质或包括该光学头的信息记录介质，包括该光盘的信息处理设备和一个物镜良好地记录或再现信息的光学头。 光头（40）包括发出蓝紫色激光的蓝紫色激光光源（1），具有圆形区域衍射结构的物镜（8），并衍射出蓝紫色激光 并将所产生的n阶衍射光（其中n是自然数）收敛在多层光盘（60）的预定信息记录表面上，并且接收蓝色的光接收元件（23） 紫外激光束，其中，所述衍射结构将正功率分量和球面像差分量添加到所述n级衍射光。

公开(公告)号：US20120170431A1

公开(公告)日：2012-07-05

申请号：US13391115

申请日：2011-06-16

申请人： Yoshiaki Komma ,  Kousei Sano

发明人： Yoshiaki Komma ,  Kousei Sano

IPC分类号： G11B7/00

CPC分类号： G11B7/1275 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical head device includes a light blocking region (7y) which is disposed on a light flux of a reflected light beam resulting from reflection by a recording layer on which a blue light beam is focused, and blocks, when there are at least two recording layers on a blue light beam incident side of the recording layer on which the blue light beam is focused or on a side thereof opposite to the blue light beam incident side, reflected light beams resulting from reflection by the at least two recording layers which are incident on a region in a photodetector (9) where the reflected light beams resulting from the reflection by the at least two recording layers interfere with each other. The light blocking region (7y) is not formed on an optical axis of the reflected light beam resulting from the reflection by the recording layer on which the blue light beam is focused. This configuration allows an improvement in the S/N ratio of a signal outputted from the photodetector.

摘要翻译： 光头装置包括遮光区域（7y），该遮光区域设置在被蓝色光束聚焦的记录层的反射产生的反射光束的光束上，并且当存在至少两个记录时 在蓝色光束聚焦的记录层的蓝色光束入射侧或其与蓝色光束入射侧相反的一侧上的层，由入射的至少两个记录层的反射产生的反射光束 在由所述至少两个记录层的反射产生的反射光束彼此干涉的光电检测器（9）中的区域上。 遮光区域（7y）不形成在被蓝色光束聚焦的记录层的反射所产生的反射光束的光轴上。 该配置允许改善从光电检测器输出的信号的S / N比。

公开(公告)号：US08206805B2

公开(公告)日：2012-06-26

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

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：US08130603B2

公开(公告)日：2012-03-06

申请号：US12356212

申请日：2009-01-20

申请人： Yoshiaki Komma ,  Fumitomo Yamasaki ,  Toshiyasu Tanaka ,  Kanji Wakabayashi

发明人： Yoshiaki Komma ,  Fumitomo Yamasaki ,  Toshiyasu Tanaka ,  Kanji Wakabayashi

IPC分类号： G11B7/00

CPC分类号： G11B7/1378 ,  G11B7/13925

摘要： An optical disk driving apparatus includes an optical head device having a laser light source, a converging optical system converging a light beam emitted by the laser light source onto an optical disk, a photo detector receiving reflected light reflected by the optical disk, and an aberration correcting optical system controlling aberration of the converging optical system; a motor rotating the optical disk; and a control section receiving a signal from the photo detector, wherein the converging optical system has an objective lens formed using resin as a main material, the aberration correcting optical system has a spherical aberration correcting element correcting spherical aberration, and the control section evaluates quality of a reproduction signal for information in the optical disk by using the reflected light received by the photo detector, and utilizes a result of the evaluation to perform closed loop control on the spherical aberration correcting element.

摘要翻译： 光盘驱动装置包括具有激光光源的光学头装置，将由激光光源发射的光束会聚在光盘上的会聚光学系统，接受由光盘反射的反射光的光电检测器和像差 调整会聚光学系统的像差的光学系统; 旋转光盘的电机; 以及控制部分，其接收来自光检测器的信号，其中会聚光学系统具有使用树脂作为主要材料形成的物镜，像差校正光学系统具有矫正球面像差的球面像差校正元件，并且控制部分评估质量 通过使用由光电检测器接收的反射光来获得光盘中的信息的再现信号，并利用评估结果对球面像差校正元件执行闭环控制。

公开(公告)号：US08107346B2

公开(公告)日：2012-01-31

申请号：US11912469

申请日：2006-04-24

申请人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

发明人： Kousei Sano ,  Yoshiaki Komma ,  Shin-ichi Kadowaki

IPC分类号： G11B7/00

CPC分类号： G11B7/1381 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0013

摘要： An optical head device according to the present invention includes a splitting section for splitting a light beam having been reflected from an optical storage medium. The splitting section includes: a first main region transmitting a first interfering portion; a second main region transmitting a second interfering portion; and first and second sub-regions through which the first interfering portion is transmitted with a lower rate than in the first main region and through which the second interfering portion is transmitted with a lower rate than in the second main region. The splitting section splits the reflected light beam into: a first main light beam transmitted through the first main region; a second main light beam transmitted through the second main region; a first sub-light beam transmitted through the first sub-region; and a second sub-light beam transmitted through the second sub-region. The splitting section further includes a swapping section for swapping a portion of the first sub-light beam with a portion of the second sub-light beam.

摘要翻译： 根据本发明的光学头装置包括用于分离已经从光学存储介质反射的光束的分离部分。 分割部分包括：传送第一干扰部分的第一主区域; 传送第二干扰部分的第二主区域; 第一和第二子区域以比在第一主区域中低的速率传输第一干扰部分，并且第二干扰部分以比在第二主要区域中更低的速率透过。 所述分割部将所述反射光束分割为：透过所述第一主区域的第一主光束; 透过第二​​主区域的第二主光束; 透射通过第一子区域的第一子光束; 和通过第二子区域传输的第二副光束。 分割部还包括用于将第一子光束的一部分与第二子光束的一部分交换的交换部分。