公开(公告)号：US07348529B2

公开(公告)日：2008-03-25

申请号：US10587210

申请日：2005-01-11

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/00

CPC classification number: G02B5/32 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0006

Abstract: An optical device diffracts incident light with a hologram element 19 and receives the diffracted light with light receiving regions 20A to 29 on a light receiving element 12. The light receiving element 12 separately receives reflected main beams used to read information from an optical disc and reflected sub-beams used for a tracking operation with different ones of the light receiving regions. The light receiving regions to receive the reflected main beams are common irrespective of the wavelengths of the reflected main beams. The light receiving regions to receive the reflected sub-beams are different depending on the wavelengths of the reflected sub-beams. The optical device can record and/or reproduce information signals to and/or from optical discs, 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: 光学器件衍射具有全息元件19的入射光，并且在光接收元件12上接收具有光接收区域20A至29的衍射光。光接收元件12分别接收用于从光盘读取信息的反射主光束， 用于与不同的光接收区域进行跟踪操作的反射子光束。 接收反射主光束的光接收区域与反射主光束的波长无关。 接收反射子光束的光接收区域根据反射子光束的波长而不同。 光学装置可以记录和/或再现需要不同波长光源的光盘的信息信号，而不受来自光盘的不必要的反射光的影响，或者不需要输出信号的复杂操作。

公开(公告)号：US20070115520A1

公开(公告)日：2007-05-24

申请号：US10587210

申请日：2005-01-11

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G03H1/00

CPC classification number: G02B5/32 ,  G11B7/0903 ,  G11B7/1353 ,  G11B2007/0006

Abstract: An optical device diffracts incident light with a hologram element 19 and receives the diffracted light with light receiving regions 20A to 29 on a light receiving element 12. The light receiving element 12 separately receives reflected main beams used to read information from an optical disc and reflected sub-beams used for a tracking operation with different ones of the light receiving regions. The light receiving regions to receive the reflected main beams are common irrespective of the wavelengths of the reflected main beams. The light receiving regions to receive the reflected sub-beams are different depending on the wavelengths of the reflected sub-beams. The optical device can record and/or reproduce information signals to and/or from optical discs, 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: 光学器件衍射具有全息元件19的入射光，并且在光接收元件12上接收具有光接收区域20A至29的衍射光。光接收元件12分别接收用于从光盘读取信息的反射主光束， 用于与不同的光接收区域进行跟踪操作的反射子光束。 接收反射主光束的光接收区域与反射主光束的波长无关。 接收反射子光束的光接收区域根据反射子光束的波长而不同。 光学装置可以记录和/或再现需要不同波长光源的光盘的信息信号，而不受来自光盘的不必要的反射光的影响，或者不需要输出信号的复杂操作。

公开(公告)号：US20070109946A1

公开(公告)日：2007-05-17

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〜30d，其在光学上与投射轨道的方向Y成轴向对称的角度 光盘。 在这些区域中，分割区域30a，30c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度的范围内沿一个或多个方向衍射光。

公开(公告)号：US08094540B2

公开(公告)日：2012-01-10

申请号：US12458406

申请日：2009-07-10

Applicant: Minoru Ohyama ,  Takahiro Kaneko

Inventor： Minoru Ohyama ,  Takahiro Kaneko

IPC: G11B7/12

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：US08050167B2

公开(公告)日：2011-11-01

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。

公开(公告)号：US20070188835A1

公开(公告)日：2007-08-16

申请号：US10589622

申请日：2005-01-25

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G03H1/00

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：US20050207316A1

公开(公告)日：2005-09-22

申请号：US10519027

申请日：2003-06-26

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/00 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135

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：US06207942B1

公开(公告)日：2001-03-27

申请号：US09286107

申请日：1999-04-02

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G01J120

CPC classification number: G11B7/131 ,  G11B7/0901 ,  G11B7/0912 ,  G11B7/0943 ,  G11B7/123 ,  G11B7/1353 ,  G11B2007/0006

Abstract: A reflected beam 6 is diffracted by regions 7a and 7b of a hologram 71, these diffracted beams are converged or diverged, and ±1-order diffracted beams from each region are received by light-receiving regions 9a+to 9b−arranged apart from the center of the hologram by a distance almost optically equal to the distance between the center point of the hologram and a convergence (focal) point of the 0-order reflected beam. Three signals obtained from three regions of each light-receiving region are calculated to obtain a focus signal, and, at the same time, signals obtained from four regions of each light-receiving region are calculated to obtain a tracking signal, so that, by using both the ±1-order diffracted beams, a focus error signal detected by the SSD method and a tracking error signal detected by the DPD method are simultaneously obtained with high efficiency and high precision.

Abstract translation: 反射光束6被全息图71的区域7a和7b衍射，这些衍射光束会聚或发散，并且来自每个区域的±1级衍射光束被接收在与 全息图的中心几乎光学上等于全息图的中心点与0阶反射光束的会聚（焦点）之间的距离。 计算从每个光接收区域的三个区域获得的三个信号以获得聚焦信号，并且同时计算从每个光接收区域的四个区域获得的信号以获得跟踪信号，从而通过 使用±1级衍射光束，以高效率和高精度同时获得通过SSD方法检测的聚焦误差信号和由DPD方法检测的跟踪误差信号。

公开(公告)号：US5322993A

公开(公告)日：1994-06-21

申请号：US23070

申请日：1993-02-25

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/09 ,  G11B7/095 ,  G11B7/12

CPC classification number: G11B7/0956

Abstract: Tilt error detecting apparatus detects a surface tilt of a disc (26) and produces a tilt-error signal (TE) for servo control of optical pickup which is to follow the surface tilt. The apparatus has a movable portion (B) carrying an objective lens (16) for writing/reading optical information on/from a recording surface (26A) of the disc and a mirror (52) or a semi-transparent mirror (24) movable together with the objective lens, and a stationary portion (A) carrying a light beam source (10, 12, 14, 22, 50) for projecting a detection beam (LC.sub.1) to the recording surface through the mirror. The detection beam is reflected at the mirror like recording surface and forms a reflected beam (LC.sub.2). Aperture is provided on the stationary portion for passing a part of the reflected beam, the partly passed reflected beam is projected on a detector which produces the tilt-error signal depending on a position of a beam spot (LC3) produced thereon by the partly passed reflected beam. In one of the two embodiments, the semi-transparent mirror (24) directs the reflected beam toward the aperture.

Abstract translation: 倾斜误差检测装置检测盘（26）的表面倾斜并产生用于遵循表面倾斜的光学拾取器的伺服控制的倾斜误差信号（TE）。 该装置具有携带用于在盘的记录表面（26A）上写入/读取光学信息的物镜（16）的可动部分（B）和可移动的反射镜（52）或半透明反射镜（24） 以及携带用于通过反射镜将检测光束（LC1）投射到记录表面的光束源（10,12,14,22,50）的固定部分（A）。 检测光束在镜像记录表面反射并形成反射光束（LC2）。 在静止部分上设置孔径以通过反射光束的一部分，部分通过的反射光束投射在检测器上，该检测器根据通过部分通过的束斑产生的束斑（LC3）的位置产生倾斜误差信号 反射光束。 在两个实施例中的一个实施例中，半透明反射镜（24）将反射光束引向光圈。

公开(公告)号：US07567496B2

公开(公告)日：2009-07-28

申请号：US11653365

申请日：2007-01-16

Applicant: Minoru Ohyama

Inventor： Minoru Ohyama

IPC: G11B7/135

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。