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11.发明授权Optical pickup device and focal error detecting device therefor and wave aberration and focal error detecting device therefor 失效光拾取装置及其焦点误差检测装置及其波像和焦点误差检测装置公开(公告)号：US07206277B2
公开(公告)日：2007-04-17
申请号：US10199706
申请日：2002-07-22
IPC分类号： G11B7/00
CPC分类号： G11B7/1395 , G11B7/0909 , G11B7/0912 , G11B7/131 , G11B7/133 , G11B7/1378 , G11B7/1381 , G11B7/13927 , G11B2007/0013
摘要： An optical pickup device includes an irradiating optical system for converging a light beam to form a spot on a recording surface via a light-transmitting layer of an optical recording medium, and a photodetection optical system for converging return light reflected and returned from the spot on a photodetector. The device detects wave aberration and focal error of the light beam. A diffractive optical element is disposed on the optical axis of return light in the photodetection optical system and provided with an annulus. The diffractive optical element annularly extracts, from return light, ray components in the vicinity of a predetermined radius on a pupil on the emitting pupil surface of the irradiating optical system, which is affected by the wave aberration generated in the optical system. The photodetector contains first light receiving components for receiving the ray components transmitted and extracted by the annulus, and second light receiving components for receiving at least some of the ray components other than the ray components transmitted by the annulus. The device further includes a focal error detecting circuit connected to the first light receiving components and which detects the focal error of the light beam on the basis of a subsequent photoelectrically converted output. The device may include a wave aberration error detecting circuit connected to the second light receiving components and which detects the wave aberration of the light beam on the basis of a subsequent photoelectrically converted output.
摘要翻译： 一种光学拾取装置，包括：照射光学系统，用于会聚光束，以经由光记录介质的透光层在记录表面上形成点;以及光电检测光学系统，用于会聚从该点反射和返回的返回光 光检测器。 该装置检测光束的波像差和焦点误差。 衍射光学元件设置在光检测光学系统中的返回光的光轴上并且设置有环形空间。 衍射光学元件从返回光环境地提取受光学系统中产生的波像影响的照射光学系统的发射光瞳表面上的光瞳附近的预定半径附近的光线分量。 光电检测器包括用于接收由环带传输和提取的光线分量的第一光接收部件，以及用于接收由环带传输的光线分量以外的至少一些光线分量的第二光接收部件。 该装置还包括连接到第一光接收部件并根据随后的光电转换输出来检测光束的焦点误差的焦点误差检测电路。 该装置可以包括连接到第二光接收部件并根据随后的光电转换输出来检测光束的波像差的波形像差误差检测电路。
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公开(公告)号：US08004951B2
公开(公告)日：2011-08-23
申请号：US12307853
申请日：2007-07-13
IPC分类号： G11B7/135
CPC分类号： G11B7/1353 , G11B7/0909 , G11B7/131 , G11B7/133 , G11B7/1378 , G11B2007/0013
摘要： A pickup device includes an irradiation optical system including an object lens for focusing light flux on a track of a recording surface of an optical recording media having a plurality of recording layers stacked while a spacer layer is interposed between the recording layers to form a spot and a detection optical system including an photo detector having a plurality of light receiving parts for receiving returning light reflected from the spot through the object lens to perform photoelectric conversion. The pickup device controls a position of the object leans according to an electrical signal calculated from outputs of the light receiving parts. The pickup device further includes an astigmatic device for providing astigmatism to the returning light directed to the light receiving parts and a division device, having divisional regions divided by a division line extending in an astigmatic direction about an optical axis of the returning light, for dividing the returning light having the astigmatism into a plurality of partial light fluxes divided for the respective divisional regions along the optical axis of returning light. The neighboring divisional regions provide the partial light fluxes with an optical action so that interference between the corresponding partial light fluxes does not occur on the light receiving parts.
摘要翻译： 拾取装置包括：照射光学系统，包括用于将光束聚焦在具有堆叠的多个记录层的光学记录介质的记录表面的轨道上的物镜，同时隔离层插入在记录层之间以形成点， 一种检测光学系统，包括具有多个光接收部分的光检测器，用于接收通过物镜从该点反射的返回光，以执行光电转换。 拾取装置根据从光接收部分的输出计算的电信号来控制物体倾斜的位置。 拾取装置还包括用于向指向光接收部分的返回光提供像散的像散装置和分割装置，该分割装置具有被围绕返回光的光轴沿像散方向延伸的分割线划分的分割区域，用于分割 将具有像散的返回光分离成沿着返回光的光轴分割成各分区的多个部分光束。 相邻分割区域提供具有光学作用的部分光束，使得在光接收部分上不发生对应的部分光束之间的干涉。
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公开(公告)号：US20090129235A1
公开(公告)日：2009-05-21
申请号：US11996430
申请日：2006-07-03
IPC分类号： G11B7/00
CPC分类号： G11B7/1381 , G11B7/0903 , G11B7/094 , G11B7/1353
摘要： The present invention provides an optical pickup device requiring no position adjustment of a diffraction grating at the time of assembling the optical pickup device, and capable of suppressing fluctuations in a differential push-pull signal amplitude and cancelling a push-pull offset.An optical pickup device 200 of an embodiment of the present invention has a diffraction grating 230 of a special shape including predetermined grooves and two kinds of lattice grooves arranged at a pitch determined on the basis of a pitch of grooves formed in the surface of an optical disk 50, numerical aperture, wavelength of a light beam, and effective diameter of the light beam applied on the optical disk 50. To suppress push-pull signals generated in the ± first-order diffraction rays, reflection rays from the optical disk 50 of a zeroth-order diffraction ray and ± first-order diffraction rays are detected, and signals corresponding to light reception results are output to a reproduction unit 150, a control unit 130, and an actuator servo circuit 140.
摘要翻译： 本发明提供了一种在组装光学拾取装置时不需要对衍射光栅进行位置调整并且能够抑制差分推挽信号振幅的波动并取消推挽偏移的光学拾取装置。 本发明实施例的光学拾取装置200具有特殊形状的衍射光栅230，该衍射光栅230包括预定的凹槽和两个格栅槽，它们以基于在光学器件表面形成的凹槽的间距所确定的间距 盘50，数值孔径，光束波长和施加在光盘50上的光束的有效直径。为了抑制在±一级衍射光线中产生的推挽信号，来自光盘50的反射光线 检测到零级衍射线和±一级衍射线，并且将对应于光接收结果的信号输出到再现单元150，控制单元130和致动器伺服电路140。
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公开(公告)号：US07903048B2
公开(公告)日：2011-03-08
申请号：US11629902
申请日：2005-06-16
申请人： Takuma Yanagisawa
发明人： Takuma Yanagisawa
IPC分类号： G09G5/00
CPC分类号： G01C21/36 , G02B27/01 , G02B2027/0118 , G02B2027/014 , G08G1/0969 , G09B29/108 , G09G3/34 , G09G2300/08
摘要： In an information display apparatus such as a head-up display, while safety is being secured, visibility from a user is improved. Image data having an object such as an arrow showing an advancing direction or a road sign drawn on it are generated as information to be given to the user by a display information generating section 12 and is output to a projector 13. When a light beam R1 corresponding to the image data is emitted from the projector 13 to a combiner 14, reflected light of the light beam R1 and transmitted light of external light R2 are combined in the combiner 14, so as to be viewed by the user. At this time, the display information generating section 12 outputs coordinate values showing a display position of the object to a transmittance control section 16, and the transmittance control section 16 specifies a display region of the object based on the coordinate values, and reduces the transmittance in the specified region of the light control panel 15 so as to reduce a transmitting amount of the external light R2.
摘要翻译： 在诸如平视显示器的信息显示装置中，在确保安全性的同时，提高了用户的可视性。 作为通过显示信息生成部12向用户提供的信息生成具有诸如表示前进方向的箭头的图像数据的图像数据，并且将其输出到投影仪13.当光束R1 对应于图像数据从投影仪13发射到组合器14，将光束R1的反射光和外部光R2的透射光组合在组合器14中，以供用户观看。 此时，显示信息生成部12将表示对象的显示位置的坐标值输出到透射率控制部16，透射率控制部16基于坐标值指定对象的显示区域，并且降低透射率 在光控制面板15的指定区域中，以减少外部光R2的透射量。
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公开(公告)号：US07835237B2
公开(公告)日：2010-11-16
申请号：US11995746
申请日：2006-07-13
申请人： Yasuo Tanahashi , Takuma Yanagisawa
发明人： Yasuo Tanahashi , Takuma Yanagisawa
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B2007/0006
摘要： There are obtainable reliable and proper tracking correction and CTC even when fluctuations occur in an irradiation position of a sub-beam in a track at the time of performing tracking correction and CTC using three beams. Five beams (a main beam, sub-beams inA and inB, and sub-beams outA and outB) are generated. Reflection beams of the five beams are received, and a differential push pull signal DPPin corresponding to the sub-beams “in” as ± first-order beams and a differential push pull signal DPPout corresponding to the sub-beams “out” as ± second-order beams are generated. By assigning weights to the differential push pull signals DPPin and DPPout and computing the sum of the weighted signals, a tracking error signal Ste having an amplitude value which can perform tracking correction is generated.
摘要翻译： 即使在执行跟踪校正时在轨道中的子光束的照射位置发生波动并且使用三个光束也可以获得可靠和适当的跟踪校正和CTC。 生成五个光束（主光束，A和InB中的子光束，以及子光束outA和outB）。 接收五个光束的反射光束，对应于子光束“in”的差分推挽信号DPPin为±一阶光束，对应于子光束“out”的差分推挽信号DPPout为±秒 生成顺序波束。 通过对差分推挽信号DPPin和DPPout分配权重并计算加权信号的和，产生具有能够执行跟踪校正的振幅值的跟踪误差信号Ste。
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公开(公告)号：US20090103417A1
公开(公告)日：2009-04-23
申请号：US11995746
申请日：2006-07-13
申请人： Yasuo Tanahashi , Takuma Yanagisawa
发明人： Yasuo Tanahashi , Takuma Yanagisawa
IPC分类号： G11B7/00
CPC分类号： G11B7/0903 , G11B2007/0006
摘要： There are obtainable reliable and proper tracking correction and CTC even when fluctuations occur in an irradiation position of a sub-beam in a track at the time of performing tracking correction and CTC using three beams. Five beams (a main beam, sub-beams inA and inB, and sub-beams outA and outB) are generated. Reflection beams of the five beams are received, and a differential push pull signal DPPin corresponding to the sub-beams “in” as ± first-order beams and a differential push pull signal DPPout corresponding to the sub-beams “out” as ± second-order beams are generated. By assigning weights to the differential push pull signals DPPin and DPPout and computing the sum of the weighted signals, a tracking error signal Ste having an amplitude value which can perform tracking correction is generated.
摘要翻译： 即使在执行跟踪校正时在轨道中的子光束的照射位置发生波动并且使用三个光束也可以获得可靠和适当的跟踪校正和CTC。 生成五个光束（主光束，A和InB中的子光束，以及子光束outA和outB）。 接收五个光束的反射光束，对应于子光束“in”的差分推挽信号DPPin为±一阶光束，对应于子光束“out”的差分推挽信号DPPout为±秒 生成顺序波束。 通过对差分推挽信号DPPin和DPPout分配权重并计算加权信号的和，产生具有能够执行跟踪校正的振幅值的跟踪误差信号Ste。
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公开(公告)号：US20070285338A1
公开(公告)日：2007-12-13
申请号：US11662946
申请日：2005-08-25
申请人： Takuma Yanagisawa
发明人： Takuma Yanagisawa
IPC分类号： G09G5/00
CPC分类号： G02B27/0101 , G02B2027/0127 , G02B2027/0138 , H04N5/23293 , H04N5/2621 , H04N5/272
摘要： An image display system includes a camera that shoots a background, a monitor that displays a shot background image, and an optical lens arranged between a display surface of the monitor and an observer. An imaginary image, obtained due to presence of the optical lens, of the monitor image is made to substantially match with a background surface. As a result, when the observer views the background through the monitor, the monitor image and the background look continuous to him.
摘要翻译： 图像显示系统包括拍摄背景的相机，显示拍摄背景图像的监视器和布置在监视器的显示表面和观察者之间的光学透镜。 使得由于光学透镜的存在而获得的监视图像的假想图像与背景表面基本匹配。 结果，当观察者通过监视器观看背景时，监视器图像和背景看起来与他连续。
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公开(公告)号：US06865144B2
公开(公告)日：2005-03-08
申请号：US09921308
申请日：2001-08-03
CPC分类号： G11B7/131 , G11B7/0956
摘要： An optical pickup apparatus includes a photodetector for receiving a diffracted light reflected from the recording medium; and a tilt detector for detecting a tilt amount of the recording medium on the basis of a light intensity within an interference region of a 0th-order diffraction light and at least one diffraction light other than the 0th-order diffraction light of the reflected light received by the photodetector.
摘要翻译： 光拾取装置包括：光电检测器，用于接收从记录介质反射的衍射光; 以及倾斜检测器，用于基于在0级衍射光的干涉区域内的光强度和除了所接收到的反射光的0级衍射光以外的至少一种衍射光来检测记录介质的倾斜量 通过光电检测器。
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19.发明授权Method for generating a focus error signal due to astigmatism and optical pickup device using the same 失效用于产生由于散光引起的聚焦误差信号的方法和使用其的光学拾取装置
公开(公告)号：US5850081A
公开(公告)日：1998-12-15
申请号：US904490
申请日：1997-08-01
申请人： Takuma Yanagisawa
发明人： Takuma Yanagisawa
CPC分类号： G11B7/131 , G11B7/094 , G11B7/0943 , G11B7/1353 , G11B7/1365 , G11B7/1372 , G11B7/0909
摘要： A method of generating a focus error signal in an optical pickup device including a photodetector including a light receiving surface for receiving the reflected light and divided into first to fourth quadrants defined in a tangential direction and in a radial direction from the center of the light receiving surface and at least four elements positioned in a centrally symmetric relationship with respect to the center of the light receiving surface within the first to fourth quadrants. A preliminary focus error signal is generated as an output difference between an addition output of one pair of the elements placed on centrally symmetric positions of the photodetector and an addition output of the other pair of the elements placed on centrally symmetric positions of the photodetector. A tangential push-pull signal is generated as an output difference between an addition output of one pair of the elements placed along the radial direction of the photodetector and an addition output of the other pair of the elements placed along the radial direction of the photodetector. A radial push-pull signal is generated as an output difference between an addition result of one pair of the elements placed along the tangential direction of the photodetector and an output result of the other pair of the elements placed along the tangential direction of the photodetector. The tangential push-pull signal and the radial push-pull signal is multiplied to generate a correction signal. The difference between the preliminary focus error signal and the correction signal is calculated to generate a focus error signal.
摘要翻译： 一种在包括光检测器的光拾取装置中产生聚焦误差信号的方法，所述光拾取装置包括用于接收反射光的光接收表面，并且被分为从光接收中心沿切线方向和径向方向限定的第一至第四象限 表面和至少四个元件相对于第一至第四象限内的光接收表面的中心定位成中心对称关系。 产生预聚焦误差信号作为放置在光检测器的中心对称位置上的一对元件的相加输出与放置在光电检测器的中心对称位置上的另一对元件的相加输出之间的输出差。 产生切向推挽信号作为沿着光电检测器的径向放置的一对元件的相加输出和沿着光电检测器的径向放置的另一对元件的相加输出之间的输出差。 产生径向推挽信号作为沿着光电检测器的切线方向放置的一对元件的相加结果与另一对元件沿着光电检测器的切线方向放置的输出结果之间的输出差。 将切向推挽信号和径向推挽信号相乘以产生校正信号。 计算出初步聚焦误差信号和校正信号之间的差异以产生聚焦误差信号。
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公开(公告)号：US5455817A
公开(公告)日：1995-10-03
申请号：US106698
申请日：1993-08-16
申请人： Takuma Yanagisawa , Seiichi Ohsawa
发明人： Takuma Yanagisawa , Seiichi Ohsawa
摘要： A reflective film is formed over a recording surface of an optical disk on which pits are formed. The reflective film is made of a non-linear optical material which, when light is incident thereon, generates second harmonics of the incident light. In a reproduction optical system for reproducing this optical disk, when a reading beam reflected by the reflective film of the optical disk impinges on a filter for filtering out the basic wave of the reading beam, the filter only transmits the second harmonics which are then incident on a light receiver. Since information signals recorded on an optical disk is reproduced by reading only second harmonics of the reflected beam, the cut-off spatial frequency of the OTF can be made twice higher as compared with a conventional reproducing apparatus. In other words, the recording density of the recording medium can be made higher.
摘要翻译： 反射膜形成在其上形成有凹坑的光盘的记录表面上。 反射膜由非线性光学材料制成，当光入射时，其产生入射光的二次谐波。 在用于再现该光盘的再现光学系统中，当由光盘的反射膜反射的读取光束入射到滤光器上以滤除读取光束的基波时，滤光器仅传输随后入射的第二谐波 在光接收器上。 由于通过仅读取反射光束的二次谐波来再现记录在光盘上的信息信号，所以与常规的再现装置相比，OTF的截止空间频率可以提高两倍。 换句话说，可以使记录介质的记录密度更高。
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