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    Optical reproducing device, optical reproducing method using the same, and optical record medium used in the same
    3.
    发明授权
    Optical reproducing device, optical reproducing method using the same, and optical record medium used in the same 失效
    光学再现装置，使用该光学再现装置的光学再现方法及其中使用的光学记录介质

    公开(公告)号：US5610879A

    公开(公告)日：1997-03-11

    申请号：US206752

    申请日：1994-03-07

    申请人： Mitsurou Moriya ,  Hiromichi Ishibashi ,  Takeo Ohta ,  Yasuhiro Sugihara

    发明人： Mitsurou Moriya ,  Hiromichi Ishibashi ,  Takeo Ohta ,  Yasuhiro Sugihara

    IPC分类号： G11B7/005 ,  G11B7/125 ,  G11B7/24 ,  G11B7/09

    CPC分类号： G11B7/126 ,  G11B7/005 ,  G11B7/24

    摘要： A record medium according to the present invention includes a substrate having concave or convex information pits and a thermosensitive material film formed on the substrate. The thermosensitive material film is changed from a high reflectance state to a low reflectance state when its temperature becomes a high level and returns to the high reflectance state when its temperature decreases to a low level. In the case where information is reproduced, when a light beam having a predetermined power is irradiated to the record medium, heat generated by the light beam is confined in the pits and the temperature in the pits increases; the thermosensitive material on the pits becomes the low reflectance state. The flat portions between the pits has high heat radiation and thus, the temperature in the flat portions does not increase so much; therefore, the state of the thermosensitive material film on the flat portions is not changed. Thus, an optical power of reflected light from the pits to which a light beam is irradiated is decreased, so that an amplitude of a reproduced signal is increased.

    摘要翻译： 根据本发明的记录介质包括具有凹或凹信息凹坑的衬底和形成在衬底上的热敏材料膜。 当其温度变为高电平时，热敏材料膜从高反射率状态变为低反射率状态，并且当其温度降低到低水平时，返回到高反射率状态。 在再现信息的情况下，当将具有预定功率的光束照射到记录介质上时，由光束产生的热量被限制在凹坑中并且凹坑中的温度增加; 凹坑上的热敏材料变成低反射率状态。 凹坑之间的平坦部分具有高热辐射，因此平坦部分中的温度不会增加太多; 因此，平坦部分上的热敏材料膜的状态不变。 因此，来自照射光束的凹坑的反射光的光功率减小，使得再现信号的幅度增加。

    Method and apparatus for recording and reproducing information on and from an optical disk
    4.
    发明授权
    Method and apparatus for recording and reproducing information on and from an optical disk 失效
    用于在光盘上记录和再现信息的方法和装置

    公开(公告)号：US4322839A

    公开(公告)日：1982-03-30

    申请号：US069570

    申请日：1979-08-24

    申请人： Tadaoki Yamashita ,  Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Mutsuo Takenaga

    发明人： Tadaoki Yamashita ,  Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Mutsuo Takenaga

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/24

    CPC分类号： G11B7/00455 ,  G11B7/24

    摘要： The optical density and/or the reflectivity of a recording layer included in an optical disk is selectively changed to record information by irradiation with a semiconductor laser beam, while the recording layer may be covered with a suitable protective film. The thickness of the recording layer is so determined that it is able to record information by means of a continuous wave type semiconductor laser beam, while the optical absorption rate of the recording layer is adjusted by setting the percentages of particular additives. The recorded information may be reproduced by the application of a laser beam, the incident power of which is lower than that of the recording beam, to detect the reflected light.

    摘要翻译： 选择性地改变包括在光盘中的记录层的光密度和/或反射率以通过用半导体激光束照射来记录信息，同时可以用合适的保护膜覆盖记录层。 记录层的厚度被确定为能够通过连续波型半导体激光束记录信息，同时通过设定特定添加剂的百分比来调节记录层的光吸收率。 记录的信息可以通过施加其入射功率低于记录光束的激光束来再现以检测反射光。

    Optical recording medium and production process for the medium
    6.
    再颁专利
    Optical recording medium and production process for the medium 失效
    光记录介质和介质的生产工艺

    公开(公告)号：USRE36383E

    公开(公告)日：1999-11-09

    申请号：US904983

    申请日：1997-08-01

    申请人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    发明人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    IPC分类号： G11B7/243 ,  G03C1/00 ,  G11B7/24 ,  G11B11/12

    CPC分类号： G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/24322 ,  G11B7/2531 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2585 ,  Y10S430/146

    摘要： An optical information recording medium is provided in which the active layer is a phase change material capable of absorbing energy and being converted between a substantially amorphous state and a substantially crystalline state. The active layer contains nitrogen, which may be in the form of a nitride or nitrides of the constituent elements of the active layer, or may be a nitrided surface thereof. The inclusion of nitrogen inhibits localized shifting of the active material, which leads to degradation of the recording/erase properties of the medium. The optical recording medium includes a substrate, onto which is deposited in sequence a first dielectric layer, a nitrogen-containing active layer, a second dielectric layer, and a metallic reflecting layer. The second dielectric layer is made thin, so that the cooling rate of the active layer is increased to form a more uniform amorphous state.

    摘要翻译： 提供一种光学信息记录介质，其中有源层是能够吸收能量并在基本上非晶态和基本上结晶状态之间转换的相变材料。 有源层含有氮，其可以是活性层的构成元素的氮化物或氮化物的形式，或者可以是其氮化表面。 包含氮抑制活性材料的局部移动，这导致介质的记录/擦除性能的劣化。 光记录介质包括基板，依次沉积有第一介电层，含氮活性层，第二介电层和金属反射层。 使第二电介质层变薄，使活性层的冷却速度增加，形成更均匀的无定形状态。

    Optical recording medium and production process for the medium
    8.
    发明授权
    Optical recording medium and production process for the medium 失效
    光记录介质和介质的生产工艺

    公开(公告)号：US5194363A

    公开(公告)日：1993-03-16

    申请号：US559166

    申请日：1990-07-30

    申请人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    发明人： Kazumi Yoshioka ,  Takeo Ohta ,  Masami Uchida ,  Katsumi Kawahara ,  Shigeaki Furukawa

    IPC分类号： G11B7/243

    CPC分类号： G11B7/243 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/24322 ,  G11B7/2531 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2585 ,  Y10S430/146

    摘要： An optical information recording medium is provided in which the active layer is a phase change material capable of absorbing energy and being converted between a substantially amorphous state and a substantially crystalline state. The active layer contains nitrogen, which may be in the form of a nitride or nitrides of the constituent elements of the active layer, or may be a nitrided surface thereof. The inclusion of nitrogen inhibits localized shifting of the active material, which leads to degradation of the recording/erase properties of the medium. The optical recording medium includes a substrate, onto which is deposited in sequence a first dielectric layer, a nitrogen-containing active layer, a second dielectric layer, and a metallic reflecting layer. The second dielectric layer is made thin, so that the cooling rate of the active layer is increased to form a more uniform amorphous state.

    摘要翻译： 提供一种光学信息记录介质，其中有源层是能够吸收能量并在基本上非晶态和基本上结晶状态之间转换的相变材料。 有源层含有氮，其可以是活性层的构成元素的氮化物或氮化物的形式，或者可以是其氮化表面。 包含氮抑制活性材料的局部移动，这导致介质的记录/擦除性能的劣化。 光记录介质包括基板，依次沉积有第一介电层，含氮活性层，第二介电层和金属反射层。 使第二电介质层变薄，使活性层的冷却速度增加，形成更均匀的无定形状态。

    Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics
    9.
    发明授权
    Optical information recording and reproducing disc employing a film having thermally changeable optical characteristics 失效
    使用具有热变化光学特性的膜的光学信息记录和再现盘

    公开(公告)号：US4852076A

    公开(公告)日：1989-07-25

    申请号：US062425

    申请日：1987-06-16

    申请人： Takeo Ohta ,  Tatsushi Nakamura ,  Shizuhiko Tanigawa

    发明人： Takeo Ohta ,  Tatsushi Nakamura ,  Shizuhiko Tanigawa

    IPC分类号： G11B7/013 ,  G11B7/24 ,  G11B7/24085 ,  G11B27/32

    CPC分类号： G11B7/24085 ,  G11B27/32 ,  G11B7/24

    摘要： An optical information recording and reproducing disc information has a substrate in the surface of which are formed signal recording grooves and cue signal recording pits. A light-absorbing thin film is formed on the surface of the substrate, the optical characteristics of the light-absorbing film being changeable thermally through irradiation by a light beam. The pitches of the grooves and pits, as well as the widths of the grooves and pits, are determined to meet specific conditions in relation to the diameter of the laser beam which is used for recording and reproduction of the signals. In addition, the depths of the grooves and pits are determined suitably in relation to the wavelength of the laser beam. With this arrangement, it is possible to attain a high quality of reproduction of information from the disc.

    摘要翻译： 光信息记录和再现盘信息具有表面上的基板，形成信号记录槽和提示信号记录凹坑。 在基板的表面上形成光吸收薄膜，光吸收膜的光学特性可通过光束的照射热变化。 凹槽和凹坑的间距以及凹槽和凹坑的宽度被确定为满足用于记录和再现信号的激光束的直径的特定条件。 此外，相对于激光束的波长适当地确定凹槽和凹坑的深度。 通过这种布置，可以从盘获得高质量的信息再现。

    System and method of optical information storage in a recording disc
    10.
    发明授权
    System and method of optical information storage in a recording disc 失效
    光信息存储在记录盘中的系统和方法

    公开(公告)号：US4330883A

    公开(公告)日：1982-05-18

    申请号：US76725

    申请日：1979-09-18

    申请人： Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Tadaoki Yamashita

    发明人： Takeo Ohta ,  Nobuo Akahira ,  Tatsushi Nakamura ,  Tadaoki Yamashita

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/24

    CPC分类号： G11B7/24 ,  G11B7/00455

    摘要： A system and a method of recording information by changes of refractive index and light absorption coefficient on a thin film, and reproducing the recorded information byscanning a focussed monochromatic light along a track on a thin film of a selected thickness andletting a light component reflected at a light-incident surface of said thin film and the other light component reflected at an inside face of the opposite surface to said incident surface of the thin film interfere with each other thereby efficiently to vary intensity of reflection light.

    摘要翻译： 一种通过薄膜上的折射率和光吸收系数的变化来记录信息的系统和方法，并且通过沿着所选厚度的薄膜上的轨道扫描聚焦的单色光并且使反射的光成分再现所记录的信息 在所述薄膜的光入射表面处，并且在与薄膜的入射表面相对的表面的内表面处反射的另一个光分量彼此干涉，从而有效地改变反射光的强度。