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1. 发明公开

EP0259832A3 Optical head 失效
标题翻译：光学头
公开(公告)号：EP0259832A3
公开(公告)日：1989-03-15
申请号：EP87113110.8
申请日：1987-09-08
申请人： HITACHI, LTD.
发明人： Miyamoto, Norifumi , Sato, Yoshio , Tsuboi, Nobuyoshi , Shimada, Satoshi , Sasaki, Hiroshi , Koyanagi, Hiroaki , Minemura, Hiroyuki
IPC分类号： G11B7/08 , G11B7/085
CPC分类号： G11B7/08547 , G11B7/0912 , G11B7/1245 , G11B7/1369
摘要： An optical head is disclosed, in which a plate-shaped optical wave guide (12) comprises an optical system including a collimator lens (14), a beam splitter (3) and an objective lens (15); a laser light source (13) for emitted a laser light in the form of a light beam which is to be impinged on an optical recording medium (6); and electro-acoustic transducers (18a, 18b, 18c, 18d, 18e, 18f) are disposed between the beam splitter (3) and the objective lens (15), the transducers being adapted to be driven by the outer electrical signal for producing surface acoustic waves in the optical wave guide (12), thereby establishing a condensation and rarefaction distribution in refractive index in the optical wave guide (12) which distribution influences the direction of transmission and the degree of focusing on the light beam passing therethrough so that regulation of the tracking and the focal length can be effected without any mechanical movements.
摘要翻译：本发明公开了一种光学头，其中板状光学波导（12）包括包括准直透镜（14），分束器（3）和物镜（15）的光学系统; 激光光源（13），用于发射以光束形式射入光学记录介质（6）的激光; 和电声换能器（18a，18b，18c，18d，18e，18f）设置在分束器（3）和物镜（15）之间，换能器适于由外部电信号驱动以产生表面（12）中的声波，由此在光波导（12）中建立折射率的冷凝和稀疏分布，该分布影响透射方向和通过其的光束的聚焦度，从而调节的跟踪和焦距可以在没有任何机械运动的情况下实现。

2. 发明授权

EP0343688B1 Optical element, optical system and rotary encoder with the optical element 失效
标题翻译：光学元件，光学系统和旋转编码器与光学元件
公开(公告)号：EP0343688B1
公开(公告)日：1993-08-18
申请号：EP89109636.4
申请日：1989-05-29
申请人： HITACHI, LTD.
发明人： Minemura, Hiroyuki , Sato, Yoshio , Tsuboi, Nobuyoshi , Koyanagi, Hiroaki , Ohyama, Shinji
IPC分类号： G11B7/135 , G11B7/00
CPC分类号： G01P3/486 , G11B7/124 , G11B7/135

3. 发明授权

EP0184750B1 Optical recording and reproducing device 失效
标题翻译：光学记录和再现设备
公开(公告)号：EP0184750B1
公开(公告)日：1991-11-06
申请号：EP85115270.2
申请日：1985-12-02
申请人： HITACHI, LTD.
发明人： Ito, Tetsuo , Sasaki, Hiroshi , Sato, Yoshio , Shimada, Satoshi , Miyamoto, Norifumi , Tsuboi, Nobuyoshi , Nihei, Hideki , Koyanagi, Hiroaki
IPC分类号： G11B7/135 , G11B7/125
CPC分类号： G11B7/1395

4. 发明公开

EP0184189A1 Optical information recording device and method 失效
标题翻译： OptischesInformationsaufzeichnungsgerätund -verfahren。
公开(公告)号：EP0184189A1
公开(公告)日：1986-06-11
申请号：EP85115325.4
申请日：1985-12-03
申请人： HITACHI, LTD.
发明人： Shimada, Satoshi , Sato, Yoshio , Sasaki, Hiroshi , Tsuboi, Nobuyoshi , Ito, Tetsuo , Nihei, Hideki , Miyamoto, Norifumi , Koyanagi, Hiroaki , Kawakami, Kanji
IPC分类号： G11B11/00
CPC分类号： G11B7/00454 , G11B7/003 , G11B7/243 , G11B2007/24306 , G11B2007/24308 , G11B2007/2431 , G11B2007/24312
摘要： A film (1) of a crystal - crystal pronase transformation type optical recording alloy is formed com an insulating substrate (11). Information is written into or ased from the alloy film by heating it with an expedient other than a laser beam. Information is read by sensing -reflected light of light projected on the alloy film.
摘要翻译：在绝缘基板（11）上形成晶体相变型光学记录合金薄膜（1）。通过加热除了激光束之外的其它方式，将信息写入或擦除合金膜。通过感测投射在合金膜上的光的反射光来读取信息。

5. 发明公开

EP0181005A3 Optical information apparatus and method of recording and erasing information 失效
标题翻译：光信息设备和记录和擦除信息的方法
公开(公告)号：EP0181005A3
公开(公告)日：1988-10-19
申请号：EP85114246
申请日：1985-11-08
申请人： HITACHI, LTD.
发明人： Sato, Yoshio , Shimada, Satoshi , Sasaki, Hiroshi , Miyamoto, Norifumi , Tsuboi, Nobuyoshi , Nihei, Hideki , Watanabe, Ryuji , Watanabe, Atsumi , Ito, Tetsuo , Koyanagi, Hiroaki
IPC分类号： G11B07/00 , G11B07/24 , G11B07/007 , G11B07/09
CPC分类号： G11B7/257 , G11B7/00557 , G11B7/0909 , G11B7/135 , G11B7/24085 , G11B7/243 , G11B2007/13727 , G11B2007/24304 , G11B2007/24308
摘要： The present invention employs as a recording medium (9) a metal or alloy which exhibits an intercrystalline transition before and after writing. In the present invention, two light beams of unequal wavelengths are used so as to write information with the light beam of the longer wavelength and to erase information with the light beam of the shorter wavelength. In changing a written content, a wavelength with which the reflection rate of the recording medium (9) increases is used.
摘要翻译：本发明作为记录介质使用在写入之前和之后呈现晶间转变的金属或合金。在本发明中，使用两个不等波长的光束，以便用较长波长的光束写入信息，并用较短波长的光束擦除信息。在改变书面内容时，使用记录介质的反射率增加的波长。

6. 发明公开

EP0280208A2 Optical head 失效
标题翻译：光学头
公开(公告)号：EP0280208A2
公开(公告)日：1988-08-31
申请号：EP88102445.9
申请日：1988-02-19
申请人： HITACHI, LTD.
发明人： Shimada, Satoshi , Ohyama, Shinji , Sato, Manabu , Ibamoto, Masahiko , Sato, Yoshio , Tsuboi, Nobuyoshi , Miyamoto, Norifumi , Minemura, Hiroyuki , Koyanagi, Hiroaki
IPC分类号： G11B7/12 , G11B7/09 , G02B6/12
CPC分类号： G02B6/124 , G02B6/12004 , G02B6/1245 , G11B7/0912 , G11B7/1245
摘要： An optical head including a substrate (1), an optical waveguide (3) formed on the substrate, a light source (4) formed on a portion of the substrate, a collimator lens (5) for converting light from the light source into parallel light rays, an objective lens (8) for focusing light from the collimator lens on a recording medium (16) and for converting reflected light from the recording medium into parallel light rays, a beam splitter (9) for dividing light from the objective lens into two parts to send out one of the parts in a predetermined direction, a coupling lens (11) for focusing light from the beam splitter on a position, and a photodetector (10) for detecting light from the coupling lens, is disclosed, in which the collimator lens (5), the objective lens (8), the beam splitter (9), the coupling lens (11) and the photodetector (10) are integrated on the substrate (1), and the collimator lens (5) or an objective lens supporting part is made flexible to vary the position of the focus of the collimator lens (5) or objective lens (8) by piezo-electric elements (29, 30; 55a to 55d).
摘要翻译：一种光学头，包括基板（1），形成在基板上的光波导（3），形成在基板的一部分上的光源（4），用于将来自光源的光转换成平行光的准直透镜（5）光束;物镜（8），用于将来自准直透镜的光聚焦在记录介质（16）上，并用于将来自记录介质的反射光转换成平行光;分束器（9），用于分离来自物镜分成两部分，沿预定方向发出部分中的一个，用于将来自分束器的光聚焦在一个位置上的耦合透镜（11）和用于检测来自耦合透镜的光的光电探测器（10）准直透镜（5），物镜（8），分束器（9），耦合透镜（11）和光电探测器（10）集成在衬底（1）上，准直透镜（5）或使物镜支撑部分变得柔软以改变t的位置他通过压电元件（29,30; 30）将准直透镜（5）或物镜（8）聚焦。 55a至55d）。

7. 发明公开

EP0184750A3 Optical recording and reproducing device 失效
标题翻译：光学记录和再现设备
公开(公告)号：EP0184750A3
公开(公告)日：1988-07-13
申请号：EP85115270
申请日：1985-12-02
申请人： HITACHI, LTD.
发明人： Ito, Tetsuo , Sasaki, Hiroshi , Sato, Yoshio , Shimada, Satoshi , Miyamoto, Norifumi , Tsuboi, Nobuyoshi , Nihei, Hideki , Koyanagi, Hiroaki
IPC分类号： G11B07/135 , G11B07/125 , G11B07/007
CPC分类号： G11B7/1395
摘要： A laser light flux is divided and synthesized so that its light intensity distribution is changed from a Gaussian distribution to a non-Gaussian distribution. When a laser light flux (L 0 ) having a Gaussian distribution is irradiated onto a dividing prism (1), it is divided into a left part (11) and a right part (1 2 ) which are refracted right and left invensely from each other. When the right and left parts (I 1 , 1 2 ) are incident on a synthesizing prism, they are refracted again and travel to be overlapped with each other on a recording medium. The light intensity distribution on a segment (dd') at the apex of the synthesizing prism is weaker at the central part and stronger at the peripheral part. This is because the light fluxes resulting from the division are inverted in their position so that the central part of the Gaussian distribution is separated left and right while the peripheral part with a weaker light intensity is centered.

8. 发明公开

EP0184188A2 Information-recording and reproducing device 失效
标题翻译： Informationenaufnahme-和wiedergabevorrichtung。
公开(公告)号：EP0184188A2
公开(公告)日：1986-06-11
申请号：EP85115324.7
申请日：1985-12-03
申请人： HITACHI, LTD.
发明人： Tsuboi, Nobuyoshi , Nihei, Hideki , Shimada, Satoshi , Sasaki, Hiroshi , Miyamoto, Norifumi , Sato, Yoshio , Koyanagi, Hiroaki , Ito, Tetsuo , Hiraga, Ryo , Watanabe, Atsumi
IPC分类号： G11B7/007 , G11B7/09 , G11B11/10
CPC分类号： G11B7/24085 , G11B7/00557 , G11B7/126 , G11B7/24088 , G11B7/243 , G11B7/2533 , G11B7/2534 , G11B7/257 , G11B7/2578 , G11B19/02 , G11B2007/24304 , G11B2007/24308 , G11B2007/25706 , G11B2007/2571 , G11B2007/25711
摘要： In an information-recording and reproducing device using a recording medium composed of metal or an alloy including at least two kinds of crystalline structures in a solid state, the crystalline structure in one temperature area being maintained in the other temperature area, or that device using a recording medium using a reversible change between crystalloid and non-crystalloid or said device using a recording medium of optical magnetism, it is designed to accomplish stable recording without being influenced by a sensitivity of a recording medium or an output change of a laser beam by means of providing a circuit for flowing a certain amount of driving current through a laser diode, accomplishing record and detecting the recording state.
摘要翻译：在使用由包含至少两种固体状态的晶体结构的金属或合金构成的记录介质的信息记录和再现装置中，一个温度区域中的晶体结构保持在另一个温度区域，或者使用使用晶体和非晶体之间的可逆变化的记录介质或使用光磁记录介质的所述器件，其被设计为在不受记录介质的灵敏度或激光束的输出变化的影响的情况下实现稳定的记录，或者通过提供用于使一定量的驱动电流流过激光二极管的电路的装置，完成记录和检测记录状态。

9. 发明授权

EP0241017B1 Optical memory medium and its information recording and erasing method and apparatus 失效
标题翻译：光学记忆介质及其信息记录和擦除方法和装置
公开(公告)号：EP0241017B1
公开(公告)日：1993-01-20
申请号：EP87105213.0
申请日：1987-04-08
申请人： HITACHI, LTD.
发明人： Sato, Yoshio , Watanabe, Atsumi Hitachi Motomachi House 22 , Shimada, Satoshi , Sasaki, Hiroshi , Tsuboi, Nobuyoshi , Nihei, Hideki , Miyamoto, Norifumi , Koyanagi, Hiroaki , Minemura, Hiroyuki
IPC分类号： G11B7/00 , G11B7/007 , G11B7/24
CPC分类号： G11B7/24 , G11B7/00557 , G11B7/00745

10. 发明公开

EP0241017A3 Optical memory medium and its information recording and erasing method and apparatus 失效
标题翻译：光学记忆介质及其信息记录和擦除方法和装置
公开(公告)号：EP0241017A3
公开(公告)日：1990-01-17
申请号：EP87105213.0
申请日：1987-04-08
申请人： HITACHI, LTD.
发明人： Sato, Yoshio , Watanabe, Atsumi Hitachi Motomachi House 22 , Shimada, Satoshi , Sasaki, Hiroshi , Tsuboi, Nobuyoshi , Nihei, Hideki , Miyamoto, Norifumi , Koyanagi, Hiroaki , Minemura, Hiroyuki
IPC分类号： G11B7/00 , G11B7/007 , G11B7/24
CPC分类号： G11B7/24 , G11B7/00557 , G11B7/00745
摘要： An information recording and erasing method and apparatus of an optical memory medium (10) including a substrate, a guard film, and an intermediate layer portion so disposed between said substrate and said guard film as to include at least a recording material layer having a phase changing with temperature and include at least one good conductor layer, comprising the steps of supplying magnetic flux varying relatively to said good conductor layer to generate eddy currents within said good conductor layer, and heating said recording material layer with heat generated in said good conductor due to the eddy current loss to effect information recording and erasing with respect to said recording material layer.

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