公开(公告)号：US20100177619A1

公开(公告)日：2010-07-15

申请号：US12376595

申请日：2006-10-04

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0901 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013

摘要： A pickup device which, focusing a ray bundle on a track of a recording surface of an optical recording medium to form a light spot, comprises a detection optical system including a photo detector to receive return light reflected from the light spot via an objective lens and perform photoelectric conversion. The photo detector has at least two photoreceptor sections positioned axis-symmetrical with respect to a detection-side division line extending through an optical axis of the return light and parallel to the track. A dividing element placed in an optical path between the photo detector and the objective lens includes at least two inner divided areas positioned axis-symmetrical with respect to a deflection-side division line extending through the optical axis of the return light and parallel to the track, and at least two outer divided areas positioned sandwiching the inner divided areas and axis-symmetrical with respect to the deflection-side division line. The inner divided areas are formed such that parts of a light beam from the other region than overlap regions, divided axis-symmetrically along the deflection-side division line, are exchanged in position across the detection-side division line and directed to the photoreceptor sections of the photo detector so as to be axis-symmetrical with respect to the detection-side division line.

摘要翻译： 一种拾取装置，其将光束聚焦在光记录介质的记录表面的轨道上以形成光点，包括检测光学系统，其包括光电检测器，以接收经由物镜从光点反射的返回光;以及 执行光电转换。 光检测器具有至少两个相对于延伸通过返回光的光轴并平行于轨道的检测侧分割线轴对称的感光体部分。 放置在光检测器和物镜之间的光路中的分隔元件包括至少两个相对于延伸穿过返回光的光轴并平行于轨道的偏转侧分割线轴对称的内分割区域 以及至少两个外分割区域，其定位为夹着内分割区域并相对于偏转侧分割线轴对称。 内部分割区域被形成为使得来自另一区域的光束的部分比沿着偏转侧分割线轴对称分割的重叠区域的部分在检测侧分割线上交替位置并且被引导到感光体部分 的光检测器相对于检测侧分割线轴对称。

公开(公告)号：US07859973B2

公开(公告)日：2010-12-28

申请号：US11886078

申请日：2006-03-13

申请人： Masakazu Ogasawara ,  Makoto Sato

发明人： Masakazu Ogasawara ,  Makoto Sato

IPC分类号： G11B7/00

CPC分类号： G11B7/1374 ,  G03H1/04 ,  G03H1/0402 ,  G03H1/0465 ,  G03H2001/0415 ,  G03H2001/0417 ,  G03H2001/0419 ,  G03H2210/22 ,  G11B7/0065 ,  G11B7/139 ,  G11C13/042

摘要： A hologram recording method is a method of recording a hologram, on a hologram recording apparatus that records information by forming a diffraction grating through oppositely irradiating the signal beam and the reference beam to the hologram record carrier. The hologram recording method includes a step of focusing the reference beam at a first numerical aperture from a first effective diameter by means of the reference-beam objective lens, a step of separating the reference beam in a part on the optical axis and a neighborhood thereof to thereby produce from the reference beam a recording reference beam to passes through the hologram record carrier at a second numerical aperture smaller than the first numerical aperture from a second effective diameter smaller than the first effective diameter by means of the reference-beam objective lens of the reference-beam optical system, and allowing the recording reference beam to exit coaxially to the reference beam, and a step of not allowing only the recording reference beam to exit toward the hologram record carrier by means of the signal-beam optical system.

摘要翻译： 全息记录方法是在全息图记录装置上记录全息图的方法，该全息图记录装置通过将信号光束和参考光束相对照射到全息图记录载体上形成衍射光栅来记录信息。 全息记录方法包括通过参考光束物镜将参考光束从第一有效直径聚焦在第一数值孔径的步骤，将参考光束在光轴上的部分及其附近分离的步骤 从而从所述参考光束产生记录参考光束，以通过小于所述第一数值孔径的第二数值孔径从小于所述第一有效直径的第二有效直径通过所述全息图记录载体借助于所述参考光束物镜 参考光束光学系统，并且允许记录参考光束与参考光束同轴地退出，以及不允许仅记录参考光束通过信号束光学系统朝向全息图记录载体排出的步骤。

公开(公告)号：US20050122857A1

公开(公告)日：2005-06-09

申请号：US10995089

申请日：2004-11-23

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Ikuya Kikuchi ,  Katsuhiro Koike

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Ikuya Kikuchi ,  Katsuhiro Koike

IPC分类号： G11B7/09 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/135 ,  G11B7/1369 ,  G11B7/1376 ,  G11B7/1392

CPC分类号： G11B7/13925 ,  G11B7/1275 ,  G11B7/1369 ,  G11B7/1376 ,  G11B2007/0006

摘要： When recording/reading information data onto/from a recording medium by irradiating the recording medium with a first light beam, correction for decreasing the amount of spherical aberration is made just before the recording or reading. On the other hand, when recording/reading information data onto/from a recording medium by irradiating the recording medium with a second light beam, focus correction for correctly condensing the reflected light from the recording medium on the light receiving surface of a photodetector is made just before the recording or reading.

摘要翻译： 当通过用第一光束照射记录介质来记录/读取记录介质上的信息数据时，在记录或读取之前进行用于减小球面像差量的校正。 另一方面，当通过用第二光束照射记录介质来将信息数据记录/从记录介质读取信息数据时，进行用于将来自记录介质的反射光正确地聚集在光电检测器的光接收表面上的聚焦校正 就在录音或阅读之前。

公开(公告)号：US08238220B2

公开(公告)日：2012-08-07

申请号：US12376595

申请日：2006-10-04

申请人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

发明人： Makoto Sato ,  Masakazu Ogasawara ,  Takuma Yanagisawa

IPC分类号： G11B7/00 ,  G11B7/135

CPC分类号： G11B7/0901 ,  G11B7/0909 ,  G11B7/133 ,  G11B7/1353 ,  G11B2007/0013

摘要： A pickup device comprising an irradiation optical system including an objective lens to focus a ray bundle on a track of a recording surface of an optical recording medium to form a light spot, and a detection optical system including a photo detector to receive return light reflected from the light spot via the objective lens and perform photoelectric conversion and controls said objective lens in position according to electrical signals produced through operations on outputs of said photo detector.

摘要翻译： 一种拾取装置，包括：包括物镜的照射光学系统，用于将光束聚焦在光记录介质的记录表面的轨道上以形成光点;以及检测光学系统，包括光电检测器，用于接收从 通过物镜进行光点并执行光电转换，并且根据通过对所述光电检测器的输出进行的操作产生的电信号将所述物镜控制在适当位置。

公开(公告)号：US08189252B2

公开(公告)日：2012-05-29

申请号：US12443612

申请日：2006-11-01

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G02B26/08

CPC分类号： G02B26/08 ,  G03H1/265 ,  G03H1/28 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/08564 ,  G11B7/133 ,  G11B7/1369

摘要： A light deflecting device is a light deflecting device for deflecting an incident light beam and has: a coarse motion light deflecting device which has an optical system having at least two conjugate points on an optical axis and deflects the light beam which has passed through one conjugate point and has entered the optical system as an output light beam which passes through the other conjugate point and has a deflection angle with respect to the optical axis while changing its transmitting direction; and a fine motion light deflecting device which is arranged in the optical system, applies a deflection to the incident light beam, and changes the deflection angle of the output light beam to a second deflection angle different from the deflection angle for a predetermined time.

摘要翻译： 光偏转装置是用于偏转入射光束的光偏转装置，具有：一个粗略的光偏转装置，它具有光学系统，该光学系统在光轴上具有至少两个共轭点，并偏转已经穿过一个共轭的光束 并且已经进入光学系统作为输出光束，其通过另一共轭点并且在改变其传输方向的同时具有相对于光轴的偏转角; 以及布置在所述光学系统中的微动光偏转装置，对入射光束施加偏转，并将输出光束的偏转角度改变为与偏转角不同的第二偏转角度达预定时间。

公开(公告)号：US20100309759A1

公开(公告)日：2010-12-09

申请号：US12679235

申请日：2007-09-20

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G11B7/00

CPC分类号： G11B7/14 ,  G11B2007/0013

摘要： A recording and reproducing method for recording and/or reproducing information from a record carrier that comprises a plurality of recording layers layered in its film thickness direction and a guide layer having a plurality of tracks carrying tracking servo information, wherein a record mark is formed on each recording layer of the record carrier. The method comprises: a focusing step of converging a servo light beam onto the guide layer as well as selectively converging a main light beam group onto one of the recording layers through a common objective lens, wherein the main light beam group comprises a plurality of main light beams neighboring each other; a tracking step of performing a positioning control of the objective lens so that the servo light beam is tracking on one of the tracks; and a recording and/or reproducing step of performing recording and/or reproducing information with the main light beam group while performing the focusing step and the tracking step. When the servo light beam traces on one of the tracks neighboring each other, one trace group is composed of the main light beam group on the one of the recording layers, wherein, when the servo light beam traces on the other of the tracks neighboring each other, the other trace group is composed of the main light beam group on the one of the recording layers, wherein an interval between the one trace group and the other trace group is larger than an average trace pitch within the trace group.

摘要翻译： 一种用于记录和/或再现来自记录载体的信息的记录和/或再现方法，所述记录载体包括在其膜厚度方向上分层的多个记录层，以及引导层，其具有承载跟踪伺服信息的多个轨迹，其中，记录标记形成在 记录载体的每个记录层。 该方法包括：聚焦步骤，将伺服光束会聚到引导层上，以及通过公共物镜选择性地将主光束组会聚到一个记录层上，其中主光束组包括多个主光束 光束彼此相邻; 跟踪步骤，执行所述物镜的定位控制，使得所述伺服光束在所述轨道之一上进行跟踪; 以及在执行聚焦步骤和跟踪步骤的同时，利用主光束组执行记录和/或再现信息的记录和/或再现步骤。 当伺服光束在彼此相邻的轨道之间轨迹时，一个迹线组由记录层之一上的主光束组组成，其中当伺服光束沿着与每个记录层相邻的轨道中的另一个轨迹 另一方面，其他跟踪组由记录层之一上的主光束组构成，其中一个跟踪组与另一个跟踪组之间的间隔大于跟踪组内的平均迹线间距。

公开(公告)号：US20100027086A1

公开(公告)日：2010-02-04

申请号：US12443612

申请日：2006-11-01

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G02B26/08 ,  G03H1/26

CPC分类号： G02B26/08 ,  G03H1/265 ,  G03H1/28 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/08564 ,  G11B7/133 ,  G11B7/1369

摘要： A light deflecting device is a light deflecting device for deflecting an incident light beam and has: a coarse motion light deflecting device which has an optical system having at least two conjugate points on an optical axis and deflects the light beam which has passed through one conjugate point and has entered the optical system as an output light beam which passes through the other conjugate point and has a deflection angle with respect to the optical axis while changing its transmitting direction; and a fine motion light deflecting device which is arranged in the optical system, applies a deflection to the incident light beam, and changes the deflection angle of the output light beam to a second deflection angle different from the deflection angle for a predetermined time.

摘要翻译： 光偏转装置是用于偏转入射光束的光偏转装置，具有：一个粗略的光偏转装置，它具有光学系统，该光学系统在光轴上具有至少两个共轭点，并偏转已经穿过一个共轭的光束 并且已经进入光学系统作为输出光束，其通过另一共轭点并且在改变其传输方向的同时具有相对于光轴的偏转角; 以及布置在所述光学系统中的微动光偏转装置，对入射光束施加偏转，并将输出光束的偏转角度改变为与偏转角不同的第二偏转角度达预定时间。

公开(公告)号：US20090310469A1

公开(公告)日：2009-12-17

申请号：US12521959

申请日：2007-01-05

申请人： Takuma Yanagisawa ,  Masakazu Ogasawara ,  Makoto Sato

发明人： Takuma Yanagisawa ,  Masakazu Ogasawara ,  Makoto Sato

IPC分类号： G11B7/135

CPC分类号： G11B7/133 ,  G11B7/0903 ,  G11B7/094 ,  G11B7/131

摘要： An optical pickup apparatus reads an information signal recorded on a recording surface of an optical disk along a track by projecting a light beam. Said optical pickup apparatus has: an objective lens for converging said light beam onto said recording surface; an objective lens moving device for moving said objective lens in a radial direction of said optical disk; and a divisional photosensing device for receiving return light reflected by said optical disk, in a plurality of divided regions. Said divisional photosensing device has: a first divisional photosensing device for dividing a first region including both edge portions in said radial direction of said return light, in two divided areas in said radial direction; a second divisional photosensing device for receiving a second region including both edge portions in a direction which perpendicularly crosses said radial direction of said return light, in two divided areas in said radial direction; and a third divisional photosensing device for receiving a third region including an almost center portion of said return light, in two divided areas in said radial direction.

摘要翻译： 光拾取装置通过投影光束沿着轨道读取记录在光盘的记录表面上的信息信号。 所述光学拾取装置具有：用于将所述光束会聚到所述记录表面上的物镜; 用于在所述光盘的径向上移动所述物镜的物镜移动装置; 以及分割光敏装置，用于在多个分割区域中接收由所述光盘反射的返回光。 所述分光感测装置具有：第一分光感测装置，用于在所述径向方向上的两个分割区域中分割包括所述返回光的所述径向方向上的两个边缘部分的第一区域; 第二分光光感测装置，用于在所述径向方向的两个分割区域中接收包括垂直于所述返回光的所述径向方向的两个边缘部分的第二区域; 以及第三分光感测装置，用于在所述径向方向上的两个分割区域中接收包括所述返回光的几乎中心部分的第三区域。

公开(公告)号：US07453787B2

公开(公告)日：2008-11-18

申请号：US10593649

申请日：2005-03-17

申请人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

发明人： Masakazu Ogasawara ,  Makoto Sato ,  Ikuya Kikuchi

IPC分类号： G11B7/00

CPC分类号： G11B7/1353 ,  G11B7/0948 ,  G11B7/1275 ,  G11B7/13927 ,  G11B2007/0006

摘要： An optical pickup projects laser beams having the first to the third wavelengths, in response to the type of a recording medium which is an object to which recording or reproduction is to be performed, and reflecting light from the recording medium is received by a light-detecting element. In order to reduce the sizes of the optical pickup, light of the second and the third wavelengths is generated by a single dual-wavelength light source, and reflecting light of all the wavelengths is to be received by the single light-detecting element. A hologram element giving different optical effects to light of each wavelength is arranged between the light irradiating means and the light-detecting element. Thus, appropriate information recording and reproduction can be performed by using light of each wavelength.

摘要翻译： 响应于要进行记录或再现的对象的记录介质的类型，并且来自记录介质的光被反射光接收，光拾取器投射具有第一至第三波长的激光束， 检测元件。 为了减小光学拾取器的尺寸，通过单个双波长光源产生第二和第三波长的光，并且所有波长的反射光将被单个光检测元件接收。 在光照射装置和光检测元件之间布置有对每个波长的光赋予不同光学效果的全息元件。 因此，可以通过使用每个波长的光来执行适当的信息记录和再现。

公开(公告)号：US20080279061A1

公开(公告)日：2008-11-13

申请号：US11886078

申请日：2006-03-13

申请人： Masakazu Ogasawara ,  Makoto Sato

发明人： Masakazu Ogasawara ,  Makoto Sato

IPC分类号： G03H1/26 ,  G11B7/135 ,  G11B7/0065

CPC分类号： G11B7/1374 ,  G03H1/04 ,  G03H1/0402 ,  G03H1/0465 ,  G03H2001/0415 ,  G03H2001/0417 ,  G03H2001/0419 ,  G03H2210/22 ,  G11B7/0065 ,  G11B7/139 ,  G11C13/042

摘要： A hologram recording method is a method of recording a hologram, on a hologram recording apparatus that records information by forming a diffraction grating through oppositely irradiating the signal beam and the reference beam to the hologram record carrier. The hologram recording method includes a step of focusing the reference beam at a first numerical aperture from a first effective diameter by means of the reference-beam objective lens, a step of separating the reference beam in a part on the optical axis and a neighborhood thereof to thereby produce from the reference beam a recording reference beam to passes through the hologram record carrier at a second numerical aperture smaller than the first numerical aperture from a second effective diameter smaller than the first effective diameter by means of the reference-beam objective lens of the reference-beam optical system, and allowing the recording reference beam to exit coaxially to the reference beam, and a step of not allowing only the recording reference beam to exit toward the hologram record carrier by means of the signal-beam optical system.

摘要翻译： 全息记录方法是在全息图记录装置上记录全息图的方法，该全息图记录装置通过将信号光束和参考光束相对照射到全息图记录载体上形成衍射光栅来记录信息。 全息记录方法包括通过参考光束物镜将参考光束从第一有效直径聚焦在第一数值孔径的步骤，将参考光束在光轴上的部分及其附近分离的步骤 从而从所述参考光束产生记录参考光束，以通过小于所述第一数值孔径的第二数值孔径从小于所述第一有效直径的第二有效直径通过所述全息图记录载体借助于所述参考光束物镜 参考光束光学系统，并且允许记录参考光束与参考光束同轴地退出，以及不允许仅记录参考光束通过信号束光学系统朝向全息图记录载体排出的步骤。