公开(公告)号：US5506830A

公开(公告)日：1996-04-09

申请号：US106129

申请日：1993-08-12

申请人： Seiichiroh Ohishi ,  Akio Yamakawa ,  Takashi Seki ,  Tetsuhiro Shiomi

发明人： Seiichiroh Ohishi ,  Akio Yamakawa ,  Takashi Seki ,  Tetsuhiro Shiomi

IPC分类号： G11B7/085 ,  G11B17/04 ,  G11B21/02 ,  G11B17/30

CPC分类号： G11B17/056 ,  G11B7/08594

摘要： A disk player has a guide member for guiding an optical pickup carrier along both sides of a double-sided disk. In order to prevent interference between the pickup carrier and the periphery of the disk during turning movement of the pickup carrier around the periphery of the disk from one of the upper and lower sides of the disk to the other side, the guide member is shaped like a horseshoe. The guide member includes upper and lower straight sections for guiding the pickup carrier, respectively, along the upper and lower sides of the disc, and an arched section extending vertically around the periphery of the disk and connecting the outer ends of the upper and lower straight sections. The upper and lower straight sections are not parallel to each other, but rather they are inclined in such a fanlike manner that the outer ends are wider apart.

摘要翻译： 磁盘播放器具有用于沿着双面盘的两侧引导光学拾取器载体的引导构件。 为了防止在将拾取器载体围绕盘的周边从盘的上侧和下侧之一转移到另一侧的转动载体周围移动期间的拾取器载体和盘周边之间的干扰，引导构件形状如 马蹄铁 引导构件包括用于分别沿着盘的上侧和下侧引导拾取器载体的上部和下部直段，以及围绕盘的周边垂直延伸并且连接上部和下部直线的外端的弓形部分 部分。 上部和下部直线段彼此不平行，而是以这样一种扇形的方式倾斜，使得外端分开较宽。

公开(公告)号：US06570828B2

公开(公告)日：2003-05-27

申请号：US09842868

申请日：2001-04-27

申请人： Nobuyasu Kikuchi ,  Akio Yamakawa ,  Yusaku Seki ,  Tetsuo Maeda ,  Yutaka Sugawara

发明人： Nobuyasu Kikuchi ,  Akio Yamakawa ,  Yusaku Seki ,  Tetsuo Maeda ,  Yutaka Sugawara

IPC分类号： G11B700

CPC分类号： G11B7/0932 ,  G11B7/0933 ,  G11B7/0935 ,  G11B7/0956 ,  G11B11/10576

摘要： A skew of an optical pickup device can be adjusted by a movable-side member itself which holds thereon an objective lens. A holder which holds an objective lens is supported by four spring wires such that it can be moved in the focusing direction and the tracking direction of an optical disk. A center of a magnetic circuit which drives the holder is shifted in the outer peripheral side relative to the optical disk. Elastic force of the spring wires of the inner peripheral side is suppressed by increasing the amount of a gel material bonded to the spring wires located on the inner peripheral side of the optical disk as a damping material as compared with the amount of the gel material bonded to the spring wires located on the outer peripheral side. Thus, the holder can be driven by a predetermined inclination in the focusing direction such that the optical axis of the objective lens becomes substantially perpendicular to the signal recording surface of the optical disk in response to the focus height changed due to the skew of the optical disk.

摘要翻译： 光拾取装置的偏斜可以通过保持物镜的可动侧部件本身进行调节。 保持物镜的保持器由四个弹簧线支撑，使得其可以在光盘的聚焦方向和跟踪方向上移动。 驱动保持器的磁路的中心相对于光盘在外周侧移位。 与凝胶材料的粘合量相比，通过增加作为阻尼材料的位于作为阻尼材料的位于作为阻尼材料的光盘的内周侧的弹簧丝的凝胶材料的量来抑制内周侧的弹簧丝的弹力 到位于外周侧的弹簧线。 因此，可以在聚焦方向上以预定的倾斜度驱动保持器，使得物镜的光轴响应于由于光学偏斜而偏移的聚焦高度而变得基本上垂直于光盘的信号记录表面 磁盘。

公开(公告)号：US5737294A

公开(公告)日：1998-04-07

申请号：US607449

申请日：1996-02-27

申请人： Akio Yamakawa ,  Kamon Uemura

发明人： Akio Yamakawa ,  Kamon Uemura

IPC分类号： G02B13/00 ,  G02B3/04 ,  G11B7/00 ,  G11B7/005 ,  G11B7/135 ,  G02B3/00

CPC分类号： G02B3/04 ,  G11B7/1374 ,  G11B2007/0006

摘要： An objective lens having at least two regions of different numerical apertures is configured for focusing a light beam through the regions of the different numerical apertures on two different signal recording surfaces of at least two optical discs having light transmitting layers of different thicknesses. Since the objective lens is integrally formed by at least two lens portions, a light beam outgoing from a common light source is focused on signal recording surfaces of at least two optical discs having the light transmitting layers of different thicknesses.

摘要翻译： 具有不同数值孔径的至少两个区域的物镜被配置用于将光束聚焦在具有不同厚度的透光层的至少两个光盘的两个不同信号记录表面上的不同数值孔径的区域。 由于物镜由至少两个透镜部分整体形成，所以从公共光源出射的光束聚焦在具有不同厚度的透光层的至少两个光盘的信号记录表面上。

公开(公告)号：US4412320A

公开(公告)日：1983-10-25

申请号：US296492

申请日：1981-08-26

申请人： Akio Yamakawa

发明人： Akio Yamakawa

IPC分类号： G11B17/054 ,  F16P3/08 ,  G11B17/032 ,  G11B33/02 ,  G11B33/12 ,  G12B9/04 ,  G11B1/00 ,  E05B47/00 ,  E05C3/06

CPC分类号： F16P3/08 ,  G11B17/032 ,  G11B33/027 ,  Y10T292/1082

摘要： A releasable cover locking device associated with a cover of a record player of the type in which a record disk is rotated during a reproduction operation when power is supplied to the record player, includes a locking mechanism having a locking lever biased about a shaft to a locking position to lock the cover into a closed position; a first release mechanism including a release link rotatably mounted on the shaft for biasing the locking lever to an unlocked position, a reciprocable rod connected to the release link and an electromagnetic plunger for actuating the reciprocable rod when power is supplied to the apparatus and when the rotational speed of the record disk falls below a predetermined value wherein the release link biases the locking lever to the unlocked position; and a second release mechanism including an arm rotatably mounted on the shaft for biasing the locking lever to the unlocked position, a stop lever connected to the arm through an operating link, a positioning mechanism for positioning the arm into opposing relation to the locking lever when the power supplied to the record player is interrupted so that the stop lever can be actuated to cause the arm to bias the locking lever to the unlocked position and to position the arm out of the opposing relation when power is supplied to the record player so that the arm cannot bias the locking lever to the unlocked position.

摘要翻译： 一种可释放的盖锁定装置，其与在记录播放器供电时的再现操作期间记录盘旋转的类型的记录播放器的盖相关联，包括锁定机构，该锁定机构具有围绕轴偏压的锁定杆 锁定位置以将盖锁定到关闭位置; 第一释放机构，包括可旋转地安装在所述轴上的释放连杆，用于将所述锁定杆偏压到解锁位置;连接到所述释放连杆的往复杆;以及用于在向所述装置供电时致动所述往复式杆的电磁柱塞， 记录盘的旋转速度降到预定值以下，其中释放连杆将锁定杆偏压到解锁位置; 以及第二释放机构，其包括可旋转地安装在所述轴上的用于将所述锁定杆偏压到所述解锁位置的臂，通过操作连杆连接到所述臂的止动杆，用于将所述臂定位成与所述锁定杆相对的定位机构， 提供给记录播放器的电力被中断，使得可以致动停止杆以使臂将锁定杆偏压到解锁位置，并且当向记录播放器供电时将臂定位在相对关系之外，使得 手臂不能将锁定杆偏压到解锁位置。

公开(公告)号：US07995445B2

公开(公告)日：2011-08-09

申请号：US12651715

申请日：2010-01-04

申请人： Akio Yamakawa ,  Kenji Tanaka

发明人： Akio Yamakawa ,  Kenji Tanaka

IPC分类号： G11B7/00

CPC分类号： G11B7/0065 ,  G11B7/13 ,  G11B7/1381

摘要： An optical pickup apparatus includes: a light source to irradiate light onto a hologram recording medium onto which information is recorded by interference fringes of signal light and reference light; a spatial light modulation portion to generate the reference light by performing a spatial light modulation on the light from the light source; and an optical system to irradiate the reference light onto the hologram recording medium via a relay lens system and an objective lens and guide reproduction light obtained from the hologram recording medium in accordance with the irradiation of the reference light to an image pickup device via the objective lens and the relay lens system, the optical system being provided with, in an optical path between the relay lens system and the image pickup device, an angle permselective device that selectively transmits light with an incidence angle of a predetermined angle or less.

摘要翻译： 光学拾取装置包括：光源，用于将信号光和参考光的干涉条纹记录在其上记录信息的全息图记录介质上; 空间光调制部分，通过对来自光源的光进行空间光调制来产生参考光; 以及光学系统，用于经由中继透镜系统和物镜将参考光照射到全息图记录介质上，并且根据通过该目的将图像拾取装置的参考光照射从全息图记录介质获得的引导再现光 透镜和中继透镜系统，光学系统在中继透镜系统和图像拾取装置之间的光路中设置有选择性地透射具有预定角度或更小的入射角的光的角度选择选择装置。

公开(公告)号：US06222803B1

公开(公告)日：2001-04-24

申请号：US08661459

申请日：1996-06-11

申请人： Kamon Uemura ,  Kiyoshi Ohsato ,  Akio Yamakawa ,  Masamichi Utsumi

发明人： Kamon Uemura ,  Kiyoshi Ohsato ,  Akio Yamakawa ,  Masamichi Utsumi

IPC分类号： G11B7095

CPC分类号： G11B19/128 ,  G11B7/0901 ,  G11B7/1372 ,  G11B7/1381 ,  G11B7/139 ,  G11B19/12 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup including a light source for radiating a light beam, a diffraction element for separating a light beam radiated from the light source into at least three beams, namely a main beam and two side beams, an objective lens for converging the light beams separated by the diffraction element on a signal recording surface of the optical recording medium, a light receiving unit having a four-segment first light receiving portion for receiving the main beam reflected by the recording surface of the optical recording medium and second and third light receiving portions arranged on both sides of the first light receiving portion for receiving the side beams reflected by the recording surface of the optical recording medium, and a calculation unit for generating a first tracking signal based on respective outputs of the first light receiving portion and for generating a second tracking signal based on outputs of the second and third light receiving portions.

摘要翻译： 一种包括用于照射光束的光源的光学拾取器，用于将从光源辐射的光束分成至少三个光束，即主光束和两个侧光束的衍射元件，用于会聚分离的光束的物镜 通过光记录介质的信号记录表面上的衍射元件，具有用于接收由光记录介质的记录表面反射的主光束的四段第一光接收部分和第二和第三光接收部分的光接收单元 布置在第一光接收部分的两侧，用于接收由光记录介质的记录表面反射的侧光束;以及计算单元，用于基于第一光接收部分的各个输出产生第一跟踪信号， 基于第二和第三光接收部分的输出的第二跟踪信号。

公开(公告)号：US5963535A

公开(公告)日：1999-10-05

申请号：US572675

申请日：1995-12-14

申请人： Akio Yamakawa ,  Takehiko Saito ,  Yoshinori Matsumoto

发明人： Akio Yamakawa ,  Takehiko Saito ,  Yoshinori Matsumoto

IPC分类号： G11B21/02 ,  G11B7/08 ,  G11B7/085 ,  G11B7/095 ,  G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/08582

摘要： A disk reproducing apparatus capable of improving the feeding accuracy of a pickup, reducing the cost of a feeding portion of the pickup, and realizing a small-sized skew adjustment mechanism at low cost, wherein the disk producing apparatus comprises: a disk driving unit for rotating a disk; a pickup having a first guide portion provided on one side portion and a guide face provided on the other side portion; a base member having a guide member for receiving the guide face, the guide member having a length shorter than the sliding distance of the pickup in the guiding direction; a driving unit for driving the pickup in the radial direction of the disk; and a signal processing unit for applying a specified processing to a signal reproduced from the pickup. Preferably, the first guide portion comprises: a guide shaft supported on the base; and a guide bearing provided on the one side portion of the pickup in such a manner as to be slidably inserted around the guide shaft.

摘要翻译： 一种能够提高拾取器的馈送精度的盘再现装置，降低拾取器的馈送部分的成本，并且以低成本实现小型倾斜调节机构，其中盘产生装置包括：盘驱动单元，用于 旋转磁盘 拾取器，其具有设置在一个侧部上的第一引导部分和设置在另一侧部分上的引导面; 具有用于接收引导面的引导构件的基座构件，所述引导构件的长度短于所述拾取器在所述引导方向上的滑动距离; 用于沿盘的径向驱动拾取器的驱动单元; 以及信号处理单元，用于对从拾取器再现的信号应用指定的处理。 优选地，第一引导部分包括：支撑在基座上的引导轴; 以及引导轴承，其设置在拾取器的一个侧部上，以便可滑动地插入在引导轴周围。

公开(公告)号：US4780865A

公开(公告)日：1988-10-25

申请号：US45239

申请日：1987-05-04

申请人： Akio Yamakawa

发明人： Akio Yamakawa

IPC分类号： G11B7/095 ,  G11B7/12

CPC分类号： G11B7/0956 ,  G11B7/12

摘要： In an optical information reproducing apparatus for reproducing an information recorded on a recording surface of a disc-shaped record medium and which includes an optical pick up device mounted on a tiltable optical block and having a laser beam source for generating a laser beam and a photo detector for detecting the reflected beam from the recording surface and for reading the recorded information, a skew error detector mounted on the tiltable optical block for detecting skewing of the record medium and a skew error corrector controlled by the output of the skew error detector for controlling the optical block so that an optical axis of the pick up device is maintained perpendicular to the recording surface; the skew error detector includes diffused light source, a divided photo detector and a lens, the light source and the divided photo detector being arranged symmetrically with respect to an axis parallel with the optical axis of the optical pick up device, the light irradiated from the diffused light source and reflected from the recording surface being directed to the divided photo detector through the lens such that a real image of the diffused light source is formed on the divided photo detector, and the difference between the amounts of light detected by respective areas of the divided photo detector corresponding to the skew error output of the skew error detector.

摘要翻译： 在用于再现记录在盘形记录介质的记录表面上的信息的光学信息再现装置中，其包括安装在可倾斜光学块上并具有用于产生激光束和照片的激光束源的光学拾取装置 检测器，用于检测来自记录表面的反射光束和读取记录信息;安装在可倾斜光学块上的偏斜误差检测器，用于检测记录介质的偏斜;以及由偏斜误差检测器的输出控制的偏斜误差校正器，用于控制 光学块，使得拾取装置的光轴保持垂直于记录表面; 偏斜误差检测器包括扩散光源，分割光检测器和透镜，光源和分光检测器相对于平行于光学拾取装置的光轴的轴对称地布置，从 扩散光源并且从记录表面反射通过透镜被引导到分光检测器，使得在分开的光检测器上形成扩散光源的实像，并且由各个区域检测的光量之差 分割光电检测器对应于偏斜误差检测器的偏斜误差输出。

公开(公告)号：US08432591B2

公开(公告)日：2013-04-30

申请号：US12704587

申请日：2010-02-12

申请人： Akio Yamakawa ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

发明人： Akio Yamakawa ,  Yoshiki Okamoto ,  Kenji Tanaka ,  Kazutatsu Tokuyama ,  Koji Takasaki

IPC分类号： G03H1/04

CPC分类号： G11B7/1275 ,  G11B7/00781 ,  G11B7/083 ,  G11B7/0908 ,  G11B7/128 ,  G11B7/1374 ,  G11B7/1378 ,  G11B7/24038 ,  G11B7/24044

摘要： A light irradiation device includes: a focus servo control unit including a light source, a spatial light modulating unit, and a light irradiating unit, for focus servo control so that the ideal focal position of light via an objective lens is such that distance between an ideal focal position and a hologram recording medium surface is smaller than distance from the surface to the lower layer side face of the recording layer, and the focal position of light via the objective lens is constant at the ideal focal position; an objective-lens/relay-lens distance adjusting unit to adjust distance between the objective lens and a relay lens close to the objective lens; a light reception unit to receive marker light; and a constant distance control unit to control the objective-lens/relay-lens distance adjusting unit based on error between the ideal position of the marker light, and the actual position of the marker light.

摘要翻译： 光照射装置包括：聚焦伺服控制单元，包括光源，空间光调制单元和光照射单元，用于聚焦伺服控制，使得经由物镜的光的理想焦点位置使得 理想焦点位置和全息图记录介质表面小于记录层的表面到下层侧面的距离，并且通过物镜的光的焦点位置在理想焦点位置处是恒定的; 物镜/中继透镜距离调节单元，用于调整物镜与靠近物镜的中继透镜之间的距离; 光接收单元，用于接收标记光; 以及恒定距离控制单元，其基于标记光的理想位置与标记光的实际位置之间的误差来控制物镜/中继透镜距离调节单元。

公开(公告)号：US20100225985A1

公开(公告)日：2010-09-09

申请号：US12697639

申请日：2010-02-01

申请人： Atsushi Fukumoto ,  Kenji Tanaka ,  Masaaki Hara ,  Akio Yamakawa

发明人： Atsushi Fukumoto ,  Kenji Tanaka ,  Masaaki Hara ,  Akio Yamakawa

IPC分类号： G03H1/22

CPC分类号： G11B7/083 ,  G03H1/16 ,  G03H2225/32 ,  G03H2225/36 ,  G03H2225/60 ,  G11B7/0065 ,  G11B20/10009 ,  G11B2220/2504

摘要： A reproducing device including a light source that emits light for reproducing recorded information to a hologram recording medium subjected to recording of information by interference fringes of signal light and reference light, a light irradiating unit that generates the reference light for obtaining a reproduced image according to the recorded information and DC light having uniform intensity and phase, and irradiates the hologram recording medium with both the reference light and the DC light and with only the DC light, a light receiving unit that performs light-reception for the DC light and the reproduced image, and performs light-reception for the DC light, and a difference calculating unit that calculates a difference between an image signal obtained based on a light-reception result of the reproduced image and the DC light, and an image signal obtained based on a light-reception result of the DC light.

摘要翻译： 一种再生装置，其特征在于，包括：光源，其向通过信号光和基准光的干涉条纹记录信息的全息图记录媒体发出记录信息的光;照射单元，生成用于获得根据 所记录的信息和DC光具有均匀的强度和相位，并且仅用DC光照射具有参考光和DC光的全息图记录介质，对DC光进行光接收的光接收单元 图像，并且对DC光进行光接收;以及差分计算单元，其计算基于再现图像的光接收结果获得的图像信号与DC光之间的差异，以及基于 直流光的光接收结果。