公开(公告)号：US07012722B2

公开(公告)日：2006-03-14

申请号：US11004129

申请日：2004-12-06

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G03H1/00

CPC分类号： G11B7/128 ,  G11B7/0065 ,  G11B7/0945 ,  G11B7/13

摘要： A holographic recording apparatus which can stably record data to be recorded onto a recording medium. The holographic recording apparatus of the present invention includes: a light source for generating a coherent reference light beam; a signal light generation unit including a spatial light modulator for spatially modulating the reference light beam in accordance with information data to generate a signal light beam; an interference unit for directing the signal light beam and the reference light beam toward a recording medium through an objective lens to form a region of a diffraction grating formed by an optical interference pattern within the recording medium; a lens positioning unit for positioning the objective lens with respect to a recording surface of the recording medium; and a light-receiving unit for detecting a returned beam that is returned from the recording medium through the objective lens. The signal light generation unit includes correction unit for detecting an amount of an optical positional offset between a recording data setting area in the spatial light modulator being supplied with said information data and an aperture area of the objective lens, and for adjusting a position of the recording data setting area in accordance with the amount of a optical positional offset.

摘要翻译： 一种能够稳定地记录要记录在记录介质上的数据的全息记录装置。 本发明的全息记录装置包括：用于产生相干参考光束的光源; 信号光生成单元，其包括用于根据信息数据空间调制参考光束的空间光调制器，以产生信号光束; 干涉单元，用于通过物镜将信号光束和参考光束引向记录介质，以形成由记录介质内的光学干涉图形形成的衍射光栅的区域; 透镜定位单元，用于相对于记录介质的记录表面定位物镜; 以及光接收单元，用于检测通过物镜从记录介质返回的返回光束。 信号光产生单元包括校正单元，用于检测被提供有所述信息数据的空间光调制器中的记录数据设置区域和物镜的孔径区域之间的光学位置偏移量，并且用于调整 记录数据设定区域与光学位置偏移量相对应。

公开(公告)号：US06967908B2

公开(公告)日：2005-11-22

申请号：US09944098

申请日：2001-09-04

申请人： Masakazu Ogasawara ,  Hajime Koyanagi

发明人： Masakazu Ogasawara ,  Hajime Koyanagi

IPC分类号： G11B7/00 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135

CPC分类号： G11B7/131 ,  G11B7/0909 ,  G11B7/0943 ,  G11B7/1381 ,  G11B2007/0013

摘要： An optical pickup device for focusing a light beam includes a focus error detecting optical element which splits and leads return light to a photodetector. The focus error detecting element has an area quadrisected by two division lines defining a plane substantially perpendicular to the optical path of the return light for applying astigmatism to the return light in directions rotated by 90° from each other and for separating the return light into at least four by the respective quadrants. The photodetector has a plurality of spaced light receiving elements for receiving the separated return light, each receiving element has contour lines corresponding to the division lines on an image plane on which a light beam is shaped into a circular beam. The light receiving elements are comprised of two light receiving areas divided by a bisect line extending substantially in parallel with one of the contour lines.

摘要翻译： 用于聚焦光束的光学拾取装置包括聚焦误差检测光学元件，其将光返回到光电检测器并将其引出。 聚焦误差检测元件具有由两条划分线划分的区域，该划分线限定了基本上垂直于返回光的光路的平面，用于将返回光在彼此旋转90°的方向上施加散光，并将返回光分离成 至少四个由相应的象限。 光电检测器具有用于接收分离的返回光的多个间隔开的光接收元件，每个接收元件具有对应于光束成形为圆形光束的图像平面上的分割线的轮廓线。 光接收元件由两个光接收区域组成，该两个光接收区域被基本上与其中一条等高线平行延伸的平分线分开。

公开(公告)号：US20050180291A1

公开(公告)日：2005-08-18

申请号：US11047687

申请日：2005-02-02

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G03H1/04 ,  G03H1/22 ,  G11B7/00 ,  G11B7/0065 ,  G11B7/09 ,  G11B7/125 ,  G11B7/128

CPC分类号： G11B7/0065 ,  G11B7/00772 ,  G11B7/0938 ,  G11B7/128

摘要： A hologram recording method for forming a light interference pattern in a hologram recording medium to record information thereon. The method includes a step of interfering with a reference beam a signal beam spatially modulated by an information pattern which carries the information to generate interfered beams. The method includes a step of executing a recording sequence a plurality of times, the recording sequence including steps of irradiating the interfered beams onto a recording surface of the hologram recording medium to form a group of a plurality of holograms each corresponding to the information pattern. The method includes a step of completing the recording sequence. Different modulation conditions are set for at least one of the signal beam and the reference beam in one recording sequence and the subsequent recording sequence immediately after the one recording sequence.

摘要翻译： 一种用于在全息图记录介质中形成光干涉图案以在其上记录信息的全息图记录方法。 该方法包括：通过信息图形空间调制的参考光束干涉参考光束的步骤，该信息图案携带信息以产生干涉光束。 该方法包括执行多次记录序列的步骤，该记录顺序包括以下步骤：将受干扰的光束照射到全息图记录介质的记录表面上，以形成各自对应于信息图案的多个全息图。 该方法包括完成记录顺序的步骤。 对于一个记录序列中的信号光束和参考光束中的至少一个设置不同的调制条件，以及紧接在一个记录序列之后的后续记录序列。

公开(公告)号：US20050179967A1

公开(公告)日：2005-08-18

申请号：US11046799

申请日：2005-02-01

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G03H1/04 ,  G03H1/18 ,  G03H1/26 ,  G11B7/00 ,  G11B7/0033 ,  G11B7/0037 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/09 ,  G11B7/13 ,  G11B7/135 ,  G11B7/24 ,  G03H1/08

CPC分类号： G11B7/24038 ,  G03H1/26 ,  G03H2250/42 ,  G11B7/0033 ,  G11B7/0037 ,  G11B7/0065 ,  G11B7/00772 ,  G11B7/083 ,  G11B7/0903 ,  G11B7/0912 ,  G11B7/0932 ,  G11B7/0933 ,  G11B7/0943 ,  G11B7/0946 ,  G11B7/131 ,  G11B7/24044 ,  G11B7/24079 ,  G11B2007/0013

摘要： A hologram recording medium is for recording or reproducing information with light irradiated thereto. The medium has a recording layer made of a photo-sensitive material, a reflective layer disposed on the opposite side of the recording layer from a light irradiated side, tracks formed on the reflective layer such that the tracks are spaced apart by a first pitch from each other to extend without intersection, and positioning marks formed on the reflective layer such that the positioning marks are spaced apart by a second pitch from each other in a direction in which the tracks extend. The second pitch is a function of the first pitch.

摘要翻译： 全息记录介质用于利用其照射的光来记录或再现信息。 该介质具有由感光材料制成的记录层，设置在与光照射侧相反的记录层侧的反射层，形成在反射层上的轨迹，使得轨迹间隔开第一间距 彼此不相交地延伸，并且在反射层上形成定位标记，使得定位标记在轨道延伸的方向上彼此间隔开第二间距。 第二音调是第一音调的函数。

公开(公告)号：US20050163015A1

公开(公告)日：2005-07-28

申请号：US11038418

申请日：2005-01-21

申请人： Makoto Sato ,  Masakazu Ogasawara

发明人： Makoto Sato ,  Masakazu Ogasawara

IPC分类号： G11B7/00 ,  G11B7/125 ,  G11B7/1275 ,  G11B7/135 ,  G11B7/1367 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/1392

CPC分类号： G11B7/1367 ,  G11B7/1275 ,  G11B7/1374 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

摘要： A combination of an object lens designed to appropriately converge a light beam L3 on a recording surface of a Blu-ray Disc, and an optical element which gives a phase difference distribution to a light beam L2 but does not give a phase difference distribution to the light beam L3, is provided. Another combination of an object lens designed to appropriately converge the light beam L3 on a recording surface of another optical disc, and an optical element which gives a phase difference distribution to a light beam L1 but does not give a phase difference distribution to the light beam L3, is provided. By the two combinations, information is recorded or reproduced, with respect to four types of recording media, which is a CD, a DVD, the Blu-ray Disc, and said another optical disc.

摘要翻译： 被设计为适当地会聚在蓝光盘的记录表面上的光束L 3的物镜的组合和向光束L 2给出相位差分布但不给出相位差分布的光学元件 提供给光束L 3。 设计成将光束L 3适当地会聚在另一光盘的记录表面上的物镜的另一组合，以及向光束L 1给出相位差分布但不给予相位差分布的光学元件 光束L 3。 通过这两种组合，关于作为CD，DVD，蓝光光盘和所述另一光盘的四种类型的记录介质来记录或再现信息。

公开(公告)号：US20050162719A1

公开(公告)日：2005-07-28

申请号：US11041724

申请日：2005-01-25

申请人： Masakazu Ogasawara ,  Akihiro Tachibana ,  Yoshihisa Kubota

发明人： Masakazu Ogasawara ,  Akihiro Tachibana ,  Yoshihisa Kubota

IPC分类号： G03H1/26 ,  G03H1/22 ,  G11B7/0065 ,  G11B7/125 ,  G11B7/13 ,  G03H1/08

CPC分类号： G11B7/00781 ,  G03H1/22 ,  G03H1/2205 ,  G03H1/2249 ,  G03H2210/20 ,  G11B7/0065 ,  G11B7/128 ,  G11B7/13

摘要： A hologram apparatus includes a light beam interfering section for allowing reference and signal light beams to interfere to form a hologram recording region; a reproducing section for allowing the reference light beam to be incident on the recording region and generating a reproduced light; an image sensor for detecting a hologram-reproduced image; a distortion determining section for detecting the distortion-detecting data from the hologram-reproduced image to determine a distortion of the hologram-reproduced image; a distortion corrector for correcting a distortion of the hologram-reproduced image; and a controller for correcting the distortion in accordance with a determined distortion.

摘要翻译： 全息图装置包括光束干涉部分，用于允许参考信号光束和信号光束干涉以形成全息图记录区域; 用于允许参考光束入射到记录区域并产生再现光的再现部分; 用于检测全息图再现图像的图像传感器; 失真确定部分，用于从全息图再现图像中检测失真检测数据，以确定全息图再现图像的失真; 用于校正全息图再现图像的失真的失真校正器; 以及控制器，用于根据确定的失真校正失真。

公开(公告)号：US20050083813A1

公开(公告)日：2005-04-21

申请号：US10968043

申请日：2004-10-20

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G11B7/085 ,  G11B7/00 ,  G11B7/125 ,  G11B7/135 ,  G11B7/1369 ,  G11B7/1374 ,  G11B7/1392

CPC分类号： G11B7/13927 ,  G11B7/1369 ,  G11B7/1374 ,  G11B2007/0006 ,  G11B2007/0013

摘要： An optical pickup apparatus includes a light source that produces and emits light beams on an optical recording medium having a plurality of recording layers; a plurality of switchable objective lenses varied in design value of a cover layer thickness; a wavefront aberration correcting unit that corrects wavefront aberration occurring when the light beams are gathered in a predetermined range from the design value of the cover layer thickness of one of the objective lenses; a detecting unit that detects a light beam reflected from the optical recording medium; and a controlling unit that controls switching of the objective lenses in accordance with the cover layer thickness of a selected one of the recording layers and that controls the wavefront aberration correcting unit.

摘要翻译： 光拾取装置包括：在具有多个记录层的光记录介质上产生并发射光束的光源; 多个可切换物镜在覆盖层厚度的设计值上变化; 波面像差校正单元，用于校正当从一个物镜的覆盖层厚度的设计值将光束聚集在预定范围内时发生的波前像差; 检测单元，其检测从所述光记录介质反射的光束; 以及控制单元，其根据所选择的一个记录层的覆盖层厚度来控制物镜的切换，并且控制波前像差校正单元。

公开(公告)号：US06882482B2

公开(公告)日：2005-04-19

申请号：US10657701

申请日：2003-09-09

申请人： Masakazu Ogasawara

发明人： Masakazu Ogasawara

IPC分类号： G02B5/18 ,  G02B1/06 ,  G02F1/13 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/1347 ,  G02F1/29 ,  G09G3/36 ,  G11B7/135

CPC分类号： G11B7/1378 ,  G02F1/133526 ,  G02F1/13471 ,  G02F1/29 ,  G02F2001/294 ,  G02F2203/50 ,  G11B7/1353 ,  G11B7/13927

摘要： A liquid-crystal lens includes a hologram liquid-crystal element having a liquid crystal which provides a light beam transmitting therethrough with a phase change so as to have a wavefront of a blaze-hologram shape; and a segment liquid-crystal element including a first electrode divided correspondingly to the blaze-hologram shape, a second electrode opposed to the first electrode and a liquid crystal for providing the transmitting light beam with a phase change by voltage application to the first and second electrodes, the segment liquid-crystal element being arranged coaxial to the hologram liquid-crystal element.

摘要翻译： 液晶透镜包括具有液晶的全息图液晶元件，其提供透射相关的光束，以便具有火焰 - 全息图形状的波前; 以及分段液晶元件，其包括对应于所述火焰 - 全息图形状分割的第一电极，与所述第一电极相对的第二电极和用于通过施加电压而将所述透射光束提供给所述第一和第二电极的液晶的液晶 电极，片状液晶元件与全息图液晶元件同轴地布置。