公开(公告)号：US07859976B2

公开(公告)日：2010-12-28

申请号：US11595869

申请日：2006-11-13

Applicant: Takayoshi Hiraga ,  Takahiro Kaneko ,  Minoru Ohyama

Inventor： Takayoshi Hiraga ,  Takahiro Kaneko ,  Minoru Ohyama

IPC: G11B7/00

CPC classification number: G11B7/0909 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/131 ,  G11B7/1353

Abstract: In a photo pickup device, an incident area 30 for a reflection light of a light spot is divided into four areas 30a˜30d by parting lines 31, 32 making axial-symmetrical angles with a direction Y of a projected track on an optical disc. In these areas, the so-divided areas 30a, 30c are formed so as to diffract the light in one or more directions in a range of 90 degrees±20 degrees to the direction Y and impress misalignment on each diffraction light. In each diffraction light, two focal lines produced due to the astigmatism make approx. 45 degrees with the direction Y of the projected track. Further, the divided areas 30b, 30d are characterized by diffracting the light in one or more directions in a range of 90 degrees±20 degrees to the direction Y.

Abstract translation: 在光拾取装置中，用于光点的反射光的入射区域30通过分割线31,32被划分为四个区域30a至30d，其与光盘上的投影轨迹的方向Y形成轴对称角度。 在这些区域中，分割区域30a，30c被形成为在与Y方向成90度±20度的范围内的一个或多个方向上衍射光，并且在每个衍射光上造成未对准。 在每个衍射光中，由于散光而产生的两个焦点线约为 与投影轨道的方向Y成45度。 此外，分割区域30b，30d的特征在于，在与Y方向成90度±20度的范围内的一个或多个方向衍射光。

公开(公告)号：US20070177484A1

公开(公告)日：2007-08-02

申请号：US11653365

申请日：2007-01-16

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/00

CPC classification number: G11B7/131 ,  G11B7/0909 ,  G11B7/1353

Abstract: In a photo pickup device, a hologram element 13 is divided into eight areas. In operation, the hologram elements adds different lens powers to four diffraction lights forming two pairs of diffraction-light groups. In the photo pickup device, a light receiving element 19 is divided into four areas to receive these diffraction lights. The photo pickup device outputs signals corresponding to four quadrants A, B, C and D forming a reflection light from an optical disc 5, allowing a focus-error signal to be calculated in the same logic as an “astigmatism method”.

Abstract translation: 在光拾取装置中，全息元件13被分成8个区域。 在操作中，全息元件对形成两对衍射光组的四个衍射光增加了不同的透镜光焦度。 在光拾取装置中，光接收元件19被分成四个区域以接收这些衍射光。 光拾取装置输出与四个象限A，B，C，D对应的信号，形成来自光盘5的反射光，允许以与“像散法”相同的逻辑计算聚焦误差信号。

公开(公告)号：US06512608B2

公开(公告)日：2003-01-28

申请号：US09736176

申请日：2000-12-15

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G02B532

CPC classification number: G11B7/131 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/123 ,  G11B7/1275 ,  G11B7/1353 ,  G11B2007/0006

Abstract: There is disclosed an optical device in which a first light source for outputting a first wavelength light is apart from a second light source for outputting a second wavelength light by a predetermined distance. An information recording medium is irradiated with the first and second wavelength lights transmitted through a holographic optical element having first and second diffraction areas. The first and second diffraction areas are provided with grating arrangements in which grating axis directions are parallel to each other and grating pitches are different from each other. The first and second wavelength lights reflected by the information recording medium are transmitted through the holographic optical element and diffracted by the first and second diffraction areas. The first and second wavelength diffracted lights by the first diffraction area are converged to much the same first position on a light receiving element substrate, and the first and second wavelength diffracted lights by the second diffraction area are converged to substantially the same second position on the light receiving element substrate. First and second light receiving elements are disposed in the first and second positions, respectively.

公开(公告)号：US5621715A

公开(公告)日：1997-04-15

申请号：US424695

申请日：1995-04-19

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B11/10 ,  G11B7/12 ,  G11B7/135 ,  G11B11/105

CPC classification number: G02B6/124 ,  G02B6/34 ,  G11B11/10543 ,  G11B7/124 ,  G11B7/1353

Abstract: An optical integrated circuit includes a substrate and a thin film formed on the substrate. A waveguide is formed by the thin film. A grating coupler includes a plurality of coupling regions for introducing an incident light beam into the waveguide, and for separating the incident light beam into output light beams propagated in the waveguide in different directions respectively. The output light beams are in a same waveguide mode and have polarization directions perpendicular to each other respectively. Photodetectors are exposed to the output light beams propagated in the waveguide for detecting the output light beams respectively.

Abstract translation: 光集成电路包括基板和形成在基板上的薄膜。 波导由薄膜形成。 光栅耦合器包括用于将入射光束引入到波导中的多个耦合区域，并且用于将入射光束分别分离成在波导中沿不同方向传播的输出光束。 输出光束处于相同的波导模式并且分别具有彼此垂直的偏振方向。 光检测器暴露于在波导中传播的输出光束，用于分别检测输出光束。

公开(公告)号：US20100008205A1

公开(公告)日：2010-01-14

申请号：US12458406

申请日：2009-07-10

Applicant: Minoru Ohyama ,  Takahiro Kaneko

Inventor： Minoru Ohyama ,  Takahiro Kaneko

IPC: G11B7/135

CPC classification number: G11B7/131 ,  G11B7/1353 ,  G11B7/1356 ,  G11B2007/0006

Abstract: An optical pickup includes a first laser beam light source 1 for emitting a light flux of a first wavelength, a diffraction grating 5 and an optical device 6 having a second laser beam light source 7 for emitting a light flux of a second wavelength and a hologram element 8. In operation, the diffraction grating 5 diffracts the backward light of the first wavelength at a predetermined angle. The hologram element 8 diffracts the backward light of the second wavelength by a first area 8a and also diffracts the backward light of the first wavelength at a reversed-polarity angle to the first area 8a by a second area 8b.

Abstract translation: 光学拾取器包括用于发射第一波长的光束的第一激光束光源1，衍射光栅5和具有用于发射第二波长的光束的第二激光束光源7和全息图的光学装置6 在操作中，衍射光栅5以预定角度衍射出第一波长的反向光。 全息元件8通过第一区域8a衍射第二波长的反射光，并且通过第二区域8b将与第一区域8a成反极性角度的第一波长的反射光衍射。

公开(公告)号：US07180845B2

公开(公告)日：2007-02-20

申请号：US10519027

申请日：2003-06-26

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/00

CPC classification number: G11B7/1356 ,  G11B7/0916 ,  G11B7/1275 ,  G11B2007/0006

Abstract: An optical pickup having a simple structure and that is capable of recording using a plurality of wavelengths is provided, comprising a primary laser light source for emitting a primary laser light having a first wavelength and that is of sufficient power for recording, an integrated device further comprising a secondary laser light source for emitting a secondary laser light having a second wavelength that is longer than the first wavelength and that is of sufficient power for recording as well as light receiving elements for receiving the light of the primary and secondary laser lights, and a polarized light beam splitter having polarization selectivity in respect of the secondary laser light.

Abstract translation: 提供具有简单结构并且能够使用多个波长进行记录的光学拾取器，包括用于发射具有第一波长并且具有足够的记录功率的初级激光的初级激光光源，进一步的集成器件 包括用于发射具有比第一波长长的第二波长并具有足够的记录功率的第二激光以及用于接收一次激光和二次激光的光的光接收元件的次级激光光源， 具有关于次级激光的偏振选择性的偏振光分束器。

公开(公告)号：US06366548B1

公开(公告)日：2002-04-02

申请号：US09420189

申请日：1999-10-18

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B700

CPC classification number: G11B7/1353 ,  G11B7/123 ,  G11B7/131 ,  G11B2007/0006

Abstract: An optical pickup of this invention includes a first laser beam source having a wave length of 780 nm and a second laser beam source having a second wave length of 650 nm wherein the first laser beam source and the second laser beam source are disposed in the vicinity of each other, emission lights from the first laser beam source and the second laser beam source are emitted along substantially the same optical axis and a reflected light from the information recording medium is returned along the optical axis; the first diffraction grating, the second diffraction grating and the light receiving device substrate are disposed in order, the first diffraction grating is substantially transparent for a wave length of 780 nm and diffracts a wave length of 650 nm, and the second diffraction grating is substantially transparent for a wave length of 650 nm while it diffracts a wave length of 780 nm.

Abstract translation: 本发明的光拾取器包括波长为780nm的第一激光束源和第二波长为650nm的第二激光束源，其中第一激光束源和第二激光束源设置在附近 相反，来自第一激光束源和第二激光束源的发射光沿着大致相同的光轴发射，并且来自信息记录介质的反射光沿光轴返回; 第一衍射光栅，第二衍射光栅和光接收装置基板依次布置，第一衍射光栅对于780nm波长实质上是透明的，衍射波长为650nm，第二衍射光栅基本上是 对波长为650nm透射，同时衍射780nm的波长。

公开(公告)号：US6122304A

公开(公告)日：2000-09-19

申请号：US104095

申请日：1998-06-24

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/00 ,  G11B7/12 ,  G11B7/125 ,  H01S5/065 ,  H01S5/14

CPC classification number: G11B7/127 ,  G11B7/123 ,  H01S5/065 ,  G11B2007/0006 ,  H01S5/14

Abstract: An optical pickup has a semiconductor laser that emits a laser beam to read information recorded on a storage medium. A length of an internal resonator of the semiconductor laser is set so as to satisfy a relationship of L.sub.A /(m+1)N

Abstract translation: 光拾取器具有发射激光束以读取记录在存储介质上的信息的半导体激光器。 半导体激光器的内部谐振器的长度被设定为满足LA /（m + 1）N

公开(公告)号：US07835251B2

公开(公告)日：2010-11-16

申请号：US10589622

申请日：2005-01-25

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/00

CPC classification number: G11B7/094 ,  G11B7/005 ,  G11B7/0943 ,  G11B7/1275 ,  G11B7/131 ,  G11B7/1353 ,  G11B2007/0006 ,  G11B2007/0013

Abstract: An optical device diffracts incident light with a hologram element and receives the diffracted light with light receiving faces 20A to 29 on a light receiving element. Reflected sub-beams used for a tracking operation are received with different ones of the light receiving faces depending on the wavelengths of the reflected sub-beams. When first light receiving faces 22, 23, 26, and 27 are receiving an incident beam of a first wavelength, output signals from the first light receiving faces and output signals from the other light receiving faces 24, 25, 28, and 29 are processed to detect an unnecessary light component. The optical device can record and/or reproduce information signals to and/or from optical discs such as DVDs and CDs which need light sources of different wavelengths, without the influence of unnecessary reflected light from the optical discs or without complicating operation of output signals.

Abstract translation: 光学器件用全息元件衍射入射光，并且在光接收元件上接收具有光接收面20A至29的衍射光。 用于跟踪操作的反射子束根据反射的子光束的波长被接收不同的光接收面。 当第一光接收面22,23,26,27接收到第一波长的入射光束时，来自第一光接收面的输出信号和来自其他光接收面24,25,28,29的输出信号被处理 以检测不必要的光分量。 光学装置可以记录和/或再现需要不同波长光源的光盘如DVD和CD的信息信号，而不受来自光盘的不必要的反射光的影响，或者没有输出信号的复杂操作。

公开(公告)号：US20100229189A1

公开(公告)日：2010-09-09

申请号：US12659214

申请日：2010-03-01

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/00

CPC classification number: G11B7/1275 ,  G11B7/12

Abstract: An optical device includes a sub-mount 2 mounting first and second semiconductor lasers 1a, 1b and having an onboard part for the semiconductor lasers and an optical-path conversion mirror 7 integrated with each other, and a light receiving element 11 arranged on a light receiving element substrate to have first and second light receiving regions separated from each other by at least one parting line. In the optical device, one light gravity center of an optical spot, which is formed on the light receiving element 11 by homeward flux of light emitted from the first semiconductor laser 1a and reflected by an optical disc 55, and another light gravity center of an optical spot, which is formed on the light receiving element 11 by homeward flux of light emitted from the second semiconductor laser 1b and reflected by the optical disc 55 are together positioned on the parting line.

Abstract translation: 光学装置包括安装第一和第二半导体激光器1a，1b并具有用于半导体激光器的板上部分和彼此一体化的光路转换反射镜7的子安装件2和布置在光上的光接收元件11 接收元件基板具有通过至少一个分隔线彼此分离的第一和第二光接收区域。 在光学装置中，通过使从第一半导体激光器1a发射并被光盘55反射的光的归纳光通过归一化的光束形成在光接收元件11上的光点的一个重心，以及另一个光重心 通过从第二半导体激光器1b发射并被光盘55反射的光的归纳光束在光接收元件11上形成的光斑一起位于分型线上。