公开(公告)号：US5648162A

公开(公告)日：1997-07-15

申请号：US177096

申请日：1993-12-30

申请人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10515 ,  G11B11/10521 ,  G11B11/10591 ,  Y10S428/90 ,  Y10T428/12736 ,  Y10T428/12771 ,  Y10T428/12868 ,  Y10T428/12896 ,  Y10T428/12903 ,  Y10T428/1291 ,  Y10T428/12917 ,  Y10T428/12924 ,  Y10T428/12931 ,  Y10T428/12937 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium including a base; a readout layer formed on the base; a recording layer formed on the readout layer; and an auxiliary recording layer formed on the recording layer, each of the readout layer, recording layer and auxiliary recording layer being made of an alloy of rare-earth metal and transition metal showing ferrimagnetism. The alloy composition of each layer is determined so that the recording layer has a Curie temperature lower than Curie temperatures of the readout layer and the auxiliary recording layer and has a coercive force higher than coercive forces of the readout layer and the auxiliary recording layer at room temperature and that, when the temperature of the recording layer is raised to near its Curie temperature while perpendicularly applying a uniform recording magnetic field to each layer, a sublattice magnetic moment of the rare-earth metal of the readout layer and a sublattice magnetic moment of the rare-earth metal of the auxiliary recording layer are antiparallel to each other. And, a method of recording information on the magneto-optical recording medium. This structure enables overwriting by light-intensity modulation without using an initializing magnetic field.

摘要翻译： 一种包括基底的磁光记录介质; 形成在基底上的读出层; 形成在读出层上的记录层; 以及形成在记录层上的辅助记录层，每个读出层，记录层和辅助记录层由稀土金属和过渡金属的合金制成，显示出铁磁性。 确定每层的合金组成，使得记录层的居里温度低于读出层和辅助记录层的居里温度，并且具有高于室内读出层和辅助记录层的矫顽力的矫顽力 并且当在每个层垂直地施加均匀的记录磁场的同时将记录层的温度升高到靠近其居里温度时，读出层的稀土金属的亚晶格磁矩和亚晶格磁矩 辅助记录层的稀土金属彼此反平行。 以及在磁光记录介质上记录信息的方法。 该结构能够通过光强度调制而不使用初始化磁场。

公开(公告)号：US5335220A

公开(公告)日：1994-08-02

申请号：US821361

申请日：1992-01-16

申请人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

发明人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24085 ,  G11B11/105 ,  G11B19/02 ,  G11B3/78

CPC分类号： G11B7/0045 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10595 ,  G11B19/02 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/24 ,  G11B7/24085

摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

摘要翻译： 一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

公开(公告)号：US4917751A

公开(公告)日：1990-04-17

申请号：US328743

申请日：1989-03-20

申请人： Kenji Ohta ,  Hiroyuki Katayama ,  Akira Takahashi ,  Yoshiteru Murakami ,  Junji Hirokane

发明人： Kenji Ohta ,  Hiroyuki Katayama ,  Akira Takahashi ,  Yoshiteru Murakami ,  Junji Hirokane

IPC分类号： B29C35/08 ,  B29C70/08 ,  G11B7/26 ,  G11B11/105

CPC分类号： G11B7/26 ,  B29C35/08 ,  B29C70/086 ,  B29C2035/0827 ,  B29L2017/005 ,  G11B11/10584 ,  Y10T156/1097 ,  Y10T156/1098

摘要： Double sided optical memory disks are produced by dropping a viscous adhesive material hardenable by ultraviolet radiation at predetermined longitudinal intervals onto an elongated cloth material of uniform thickness thereby causing the adhesive material to become absorbed by and contained in the cloth material, thereafter placing this cloth material sandwichedly between two optical disk pieces each containing a recording layer, thereafter applying pressure between these pieces such that the sandwiching pieces remain separated uniformly by a predetermined separation distance, and thereafter applying ultraviolet radiation to and thereby hardening the adhesive material while the disk pieces are maintained at the uniform separation distance.

摘要翻译： 双面光学记忆盘是通过将能够以预定的纵向间隔使紫外线辐射固化的粘性粘合剂材料滴落到均匀厚度的细长布料上制成的，从而使粘合剂材料被布料吸收并包含在布料中，然后将该布料 夹在两个光盘片之间，每个光盘片均包含记录层，然后在这些片之间施加压力，使得夹持片保持均匀分离预定的间隔距离，然后在保持盘片的同时施加紫外线辐射，从而硬化粘合剂材料 在均匀分离距离。

公开(公告)号：US4764441A

公开(公告)日：1988-08-16

申请号：US930157

申请日：1986-11-12

申请人： Kenji Ohta ,  Junji Hirokane ,  Tetsuya Inui ,  Akira Takahashi ,  Hiroyuki Katayama

发明人： Kenji Ohta ,  Junji Hirokane ,  Tetsuya Inui ,  Akira Takahashi ,  Hiroyuki Katayama

IPC分类号： G03F1/00 ,  G03F1/38 ,  G03F1/58 ,  G03F9/00

CPC分类号： G03F1/58 ,  G03F1/38 ,  G03F1/50

摘要： A photo-mask which is used for the production of a substrate for an optical memory element includes a reflective film formed over an ultraviolet non-transmissive film on a substrate. Alternatively, a multi-layer dielectric film which is not transmissive to light of wavelength about 400 nm but transmissive to light of wavelength about 450 nm is formed on a substrate.

摘要翻译： 用于制造光存储元件用基板的光掩模包括在基板上的紫外线不透光膜上形成的反射膜。 或者，在基板上形成不透射波长约400nm但对波长约450nm的光透射的多层电介质膜。

公开(公告)号：US4719137A

公开(公告)日：1988-01-12

申请号：US721707

申请日：1985-04-10

申请人： Kenji Ohta ,  Akira Takahashi ,  Hiroyuki Katayama ,  Junji Hirogane ,  Yoshiteru Murakami

发明人： Kenji Ohta ,  Akira Takahashi ,  Hiroyuki Katayama ,  Junji Hirogane ,  Yoshiteru Murakami

IPC分类号： G11B11/105 ,  G11B7/24

CPC分类号： G11B11/10586 ,  G11B11/10593 ,  Y10S428/90 ,  Y10S430/146 ,  Y10T428/22 ,  Y10T428/31678

摘要： A magneto-optic memory element includes a GdTbFe recording layer sandwiched between a pair of transparent AlN dielectric layers. At least one of the pair of transparent AlN dielectric layers is extended to have a size larger than the GdTbFe recording layer so as to cover the peripheral edge of the GdTbFe recording layer, thereby protecting the GdTbFe recording layer from oxygen and moisture. An Al-Ni alloy reflection film is formed on one of the pair of transparent AlN dielectric layers in order to increase the apparent Kerr rotation angle produced by the magneto-optic memory element.

公开(公告)号：US5600627A

公开(公告)日：1997-02-04

申请号：US340333

申请日：1994-11-14

申请人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junji Hirokane ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B7/007 ,  G11B7/013 ,  G11B7/14 ,  G11B13/04

CPC分类号： G11B7/00745 ,  G11B7/14 ,  G11B7/24079 ,  G11B7/24085

摘要： The method of the present invention is for recording, reproducing, and deleting information on and from an optical disk including a plurality of tracks each having M guide grooves (M is an integer equal to or larger than 2) and M-1 land(s) interposed between the adjacent guide grooves, at least one of the land(s) having a group of pits for producing address information. The method includes the step of: focusing light beams on the respective guide grooves and land(s) for effecting the recording, reproduction, and deletion of information. Such an optical disk is also provided.

摘要翻译： 本发明的方法是用于在包括M个导槽（M为2以上的整数）的多个轨道的光盘上记录，再现和删除信息，M-1个地面 ）插入在相邻引导槽之间，至少一个具有一组凹坑的区域用于产生地址信息。 该方法包括以下步骤：将光束聚焦在各个引导槽和岸台上，以进行信息的记录，再现和删除。 还提供了这种光盘。

公开(公告)号：US5459711A

公开(公告)日：1995-10-17

申请号：US219253

申请日：1994-03-29

申请人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

发明人： Kenji Ohta ,  Tetsuya Inui ,  Hiroyuki Katayama ,  Akira Takahashi ,  Junji Hirokane ,  Yukinori Nishitani ,  Michinobu Mieda ,  Kazuo Van

IPC分类号： G11B7/0045 ,  G11B7/013 ,  G11B7/09 ,  G11B7/125 ,  G11B7/24 ,  G11B7/24085 ,  G11B11/105 ,  G11B19/02 ,  G11B3/78

CPC分类号： G11B7/0045 ,  G11B11/10528 ,  G11B11/10578 ,  G11B11/10595 ,  G11B19/02 ,  G11B7/0938 ,  G11B7/126 ,  G11B7/24 ,  G11B7/24085

摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

摘要翻译： 一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

公开(公告)号：US5414652A

公开(公告)日：1995-05-09

申请号：US293720

申请日：1994-08-22

申请人： Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B7/007 ,  G11B11/105 ,  G11C13/06

CPC分类号： G11B7/24079 ,  G11B11/10584 ,  G11B7/00718

摘要： A magneto-optical memory element including: grooves, formed on at least one surface of a transparent substrate, for guiding a light beam; a magneto-optical recording layer formed on the surface of said transparent substrate on which the grooves are formed, wherein a width of each groove and a width of each land formed between the grooves are substantially equal, information is recorded on and reproduced from tracks on the grooves and the lands, and a groove depth d (track depth) is arranged such that 0.13.times..lambda./n.ltoreq.d.ltoreq. 0.18.times. .lambda./n, where .lambda. is a wavelength of the light beam and n is a refraction index of the transparent substrate. Assuming that a diameter of the light beam at a portion where a light intensity of the light beam becomes 1/e.sup.2 of a light intensity of the center of the light beam is L, a track pitch p is arranged such that 0.6.ltoreq.L/p.ltoreq.1.2. Therefore, even when the track density is increased, i.e., the width of the groove portion and the width of the land portion are reduced, a satisfactory signal quality with low level of crosstalk is obtained. Accordingly, such a magneto-optical disk achieves a high recording density.

摘要翻译： 一种磁光存储元件，包括：形成在透明基板的至少一个表面上的用于引导光束的凹槽; 形成在所述透明基板的形成有凹槽的表面上的磁光记录层，其中每个凹槽的宽度和在凹槽之间形成的每个焊盘的宽度基本上相等，信息被记录在磁道上并从其上再现 凹槽和焊盘以及凹槽深度d（磁道深度）被布置成使得0.13xλ/n≤d≤0.18xλ/ n，其中λ是光束的波长，n是 透明基板的折射率。 假设在光束的光强度变为光束中心的光强度的1 / e2的部分处的光束的直径为L，则轨道间距p被布置成使得0.6≤L /p

公开(公告)号：US5081614A

公开(公告)日：1992-01-14

申请号：US577817

申请日：1990-09-04

申请人： Akira Takahashi ,  Toshihisa DeGuchi ,  Yoshiteru Murakami ,  Michinobu Mieda ,  Kazuo Van ,  Kenji Ohta ,  Hiroyuki Katayama ,  Tomoyuki Miyake

发明人： Akira Takahashi ,  Toshihisa DeGuchi ,  Yoshiteru Murakami ,  Michinobu Mieda ,  Kazuo Van ,  Kenji Ohta ,  Hiroyuki Katayama ,  Tomoyuki Miyake

IPC分类号： G11B7/12 ,  G11B7/135 ,  G11B11/105

CPC分类号： G11B11/10532 ,  G11B7/12 ,  G11B7/1381

摘要： A magneto-optical head wherein a light flux, which is reflected from a recording medium, is separated into its central portion and remaining portion. The central light flux portion is only used as a magneto-optical signal while the remaining light flux portion is only used as an optical servo signal.

摘要翻译： 一种磁光头，其中从记录介质反射的光束被分离成其中心部分和剩余部分。 中央光束部分仅用作磁光信号，而剩余光通量部分仅用作光伺服信号。

公开(公告)号：US4985885A

公开(公告)日：1991-01-15

申请号：US213817

申请日：1988-06-30

申请人： Kenji Ohta ,  Akira Takahashi ,  Hiroyuki Katayama ,  Junji Hirokane ,  Yoshiteru Murakami

发明人： Kenji Ohta ,  Akira Takahashi ,  Hiroyuki Katayama ,  Junji Hirokane ,  Yoshiteru Murakami

IPC分类号： G11B11/105 ,  G11B19/12 ,  G11B19/20

CPC分类号： G11B19/12 ,  G11B11/10584 ,  G11B11/10586 ,  G11B19/20

摘要： An optical memory device comprising a first light-permeable substrate, a second light-permeable substrate and a plurality of strip-shaped optical recording layers that are disposed with a gap between the first substrate and the second substrate, wherein the optical path length from the outer surface of the first substrate to the recording layers is approximately equal to the optical path length from the outer surface of the second surface to the recording layers.