专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

EP0156141B1 Prism optics and optical information processing apparatus 失效
标题翻译： PRISM OPTICS和光信息处理设备
公开(公告)号：EP0156141B1
公开(公告)日：1992-05-13
申请号：EP85101445.6
申请日：1985-02-11
申请人： HITACHI, LTD. , HITACHI KOKI CO., LTD.
发明人： Arimoto, Akira , Nakamura, Shigeru
IPC分类号： G02B17/04 , G02B5/04 , G02B13/10
CPC分类号： G02B27/0972 , G02B17/04 , G02B27/09 , G02B27/0911 , G11B7/1356 , G11B7/1359 , G11B7/1398

2. 发明公开

EP0156141A2 Prism optics and optical information processing apparatus 失效
标题翻译：棱镜系统和设备，用于处理光信息。
公开(公告)号：EP0156141A2
公开(公告)日：1985-10-02
申请号：EP85101445.6
申请日：1985-02-11
申请人： HITACHI, LTD. , HITACHI KOKI CO., LTD.
发明人： Arimoto, Akira , Nakamura, Shigeru
IPC分类号： G02B17/04 , G02B5/04 , G02B13/10
CPC分类号： G02B27/0972 , G02B17/04 , G02B27/09 , G02B27/0911 , G11B7/1356 , G11B7/1359 , G11B7/1398
摘要： An optical system for converting shape of a light beam by making use of refraction of prisms comprises a prism optic which includes a complex prism (10; 11) constituted by combination of at least two types of orisms (10A, 10B; 11A, 11B) made of materials differing from each other in respect to dispersion of refractivity. An optical information processing apparatus includes the optical system employing the prisms. Geometric optical properties of the optical system is insusceptible to being changed irrespective of changes in wavelength of the light beam brought about by dispersion in oscillation wavelength of a light source, change in the course of time lapse, change in ambient temperature and/or change in emitted light energy. With the optical system, information processing is realized which is insusceptible to the influence of the change in wavelength of the light beam.

3. 发明授权

EP0393652B1 Magneto-optical recording and reproducing method, magnetooptical memory apparatus 失效
标题翻译：磁 - 光记录和再现方法，磁光存储设备
公开(公告)号：EP0393652B1
公开(公告)日：1996-11-06
申请号：EP90107406.2
申请日：1990-04-19
申请人： HITACHI, LTD.
发明人： Kaku, Toshimitsu , Nakamura, Shigeru , Takahashi, Masahiko , Niihara, Toshio , Miyamoto, Harukazu , Ohta, Norio , Nakao, Takeshi , Sukeda, Hirofumi , Ojima, Masahiro , Toyooka, Takashi , Suganuma, Tsuneo , Kirino, Fumiyoshi , Miyamura, Yoshinori
IPC分类号： G11B11/10 , G11B7/24 , G11B13/04
CPC分类号： G11B11/10584 , G11B11/10536 , G11B11/10545 , G11B11/10593

4. 发明授权

EP0073066B1 Optical recording apparatus 失效
标题翻译：光学记录仪
公开(公告)号：EP0073066B1
公开(公告)日：1988-08-17
申请号：EP82107867.2
申请日：1982-08-26
申请人： Hitachi, Ltd.
发明人： Tsunoda, Yoshito , Maeda, Takeshi , Nakamura, Shigeru , Kaku, Toshimitsu
IPC分类号： G11B7/095 , G11B7/125 , G02B27/44
CPC分类号： G11B7/09 , G11B7/0903 , G11B7/125

5. 发明公开

EP0156141A3 Prism optics and optical information processing apparatus 失效
标题翻译： PRISM OPTICS和光信息处理设备
公开(公告)号：EP0156141A3
公开(公告)日：1988-03-02
申请号：EP85101445
申请日：1985-02-11
申请人： HITACHI, LTD. , HITACHI KOKI CO., LTD.
发明人： Arimoto, Akira , Nakamura, Shigeru
IPC分类号： G02B17/04 , G02B05/04 , G02B13/10
CPC分类号： G02B27/0972 , G02B17/04 , G02B27/09 , G02B27/0911 , G11B7/1356 , G11B7/1359 , G11B7/1398
摘要： An optical system for converting shape of a light beam by making use of refraction of prisms comprises a prism optic which includes a complex prism (10; 11) constituted by combination of at least two types of orisms (10A, 10B; 11A, 11B) made of materials differing from each other in respect to dispersion of refractivity. An optical information processing apparatus includes the optical system employing the prisms. Geometric optical properties of the optical system is insusceptible to being changed irrespective of changes in wavelength of the light beam brought about by dispersion in oscillation wavelength of a light source, change in the course of time lapse, change in ambient temperature and/or change in emitted light energy. With the optical system, information processing is realized which is insusceptible to the influence of the change in wavelength of the light beam.

6. 发明公开

EP0171816A1 Autofocusing control system 失效
标题翻译：自动控制系统。
公开(公告)号：EP0171816A1
公开(公告)日：1986-02-19
申请号：EP85110270.7
申请日：1985-08-16
申请人： HITACHI, LTD.
发明人： Nakamura, Shigeru , Tsunoda, Yoshito , Maeda, Takeshi
IPC分类号： G11B7/09
CPC分类号： G11B7/1381 , G11B7/08547 , G11B7/0908 , G11B7/0916 , G11B7/1374
摘要： An autofocusing control system makes a position of focusing spot (Si) follow for itself a displacement of an information medium (5). In the autofocusing control system, a single mode semiconductor laser (1) is excited in a multi oscillation mode by returning part of a reflected light beam from the information medium, and a focusing lens (20) having chromatic aberration is used which focuses a laser beam from the semiconductor laser onto a different position along the optical axis of the lens in association with a different laser wavelength.

7. 发明公开

EP0099576A2 Optical information processor 失效
标题翻译： OptischesGerätzur Informationsverarbeitung。
公开(公告)号：EP0099576A2
公开(公告)日：1984-02-01
申请号：EP83107110.5
申请日：1983-07-20
申请人： HITACHI, LTD.
发明人： Kaku, Toshimitsu , Tsunoda, Yoshito , Maeda, Takeshi , Nakamura, Shigeru
IPC分类号： G11B7/095 , G11B7/013 , G11B7/08
CPC分类号： G11B27/30 , G11B7/00745 , G11B7/09 , G11B7/094 , G11B7/0956 , G11B20/10203 , G11B2220/2537
摘要： This invention discloses an optical information processor which comprises:

a recording medium (76) equipped with mirror areas disposed equidistantly inside an information track (77) recorded by a light beam;
a light detector (78, 79) receiving the diffraction light from the information track by the light beam;
first signal detecting means (81, 82, 82', 83, 84, 85) differentially operating the signals from the light detector and generating a tracking signal tracking the information track; and
second signal detecting means (80, 85) detecting the signal from the mirror areas of the tracking signal;
wherein offset in the tracking signal is removed by use of the signal from the second signal detecting means.
摘要翻译：本发明公开了一种光信息处理器，它包括：一个记录介质，配有一个等距离设置在由光束记录的信息轨道内的反射镜区域;一个光检测器，通过光束的信息轨道; ...第一信号检测装置（81,82,82分钟，83,84,85），差分地操作来自光检测器的信号，并产生跟踪信息轨迹的跟踪信号; 和第二信号检测装置（80,85），其检测来自跟踪信号的反射镜区域的信号;其中通过使用来自第二信号检测装置的信号来消除跟踪信号中的偏移。

8. 发明公开

EP1220213A1 Optical head 审中-公开
标题翻译：光学头
公开(公告)号：EP1220213A1
公开(公告)日：2002-07-03
申请号：EP02005573.7
申请日：1999-02-12
申请人： Hitachi Ltd.
发明人： Shimano, Takeshi , Nakamura, Shigeru , Ohnishi, Kunikazu , Inoue, Masayuki , Fukui, Yukio
IPC分类号： G11B7/12 , G11B7/135 , G11B7/09 , G11B7/095 , G11B7/13
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An information reproducing method for reproducing information recorded on an optical disk (107), wherein light from a semiconductor laser (101) is converged as at least one focused spot on the optical disk. The light is reflected as a plurality of reflected light beams the polarities of the intensity distributions of which are mutually in a substantially inverted relationship with each other when the focused spot crosses a track of the optical disk. The reflected beams are detected and their respective focus error signals are added to obtain a focus error signal, and their respective tracking error signals are subtracted to obtain a tracking error signal. The optical disk has a groove width equal to substantially one half of its track pitch. The tracking error signals may be amplified by a gain proportional to a ratio between reciprocals of respective total amounts of light reflected by the plurality of reflected beams.
摘要翻译：一种信息再现方法，用于再现记录在光盘（107）上的信息，其中来自半导体激光器（101）的光被会聚为光盘上的至少一个聚焦点。光被反射为多个反射光束，当聚焦点与光盘的轨道相交时，其强度分布的极性彼此基本上呈相反的关系。反射光束被检测并且它们各自的聚焦误差信号被相加以获得聚焦误差信号，并且它们各自的跟踪误差信号被减去以获得跟踪误差信号。光盘的槽宽基本上等于其轨道间距的一半。跟踪误差信号可以通过与由多个反射光束反射的各个总光量的倒数之间的比例成比例的增益来放大。

9. 发明公开

EP0899724A3 Phase change optical disk medium 审中-公开
标题翻译： Optische Datenplatte mit Phasenwechselaufzeichnung
公开(公告)号：EP0899724A3
公开(公告)日：2000-02-02
申请号：EP98114839.8
申请日：1998-08-06
申请人： Hitachi, Ltd.
发明人： Nakamura, Shigeru , Nishida, Tetsuya , Miyamoto, Makoto
IPC分类号： G11B7/00 , G11B7/007 , G11B7/24
CPC分类号： G11B27/24 , G11B7/0052 , G11B7/00718 , G11B7/24 , G11B7/24079 , G11B7/24085 , G11B27/3027 , G11B2220/216 , G11B2220/2575
摘要： A phase change optical disk medium includes a disklike substrate (2), and a recording layer (3) formed by a laminate of a plurality of thin layers including a phase change layer (5). Information marks are recorded on the phase change layer by phase changes from a crystal phase to an amorphous phase and vice versa. The recording layer has tracks for recording information marks formed by groove portions (9) and land portions (8) respectively taking alternate concave and convex shapes. The track has an interval in range of 0.54 to 0.64 µm and the recording layer has a ratio of the optical reflectance of 0.35 or less when the phase change layer has changed to the amorphous phase in case where the optical reflectance of the recording layer is 1 when the phase change layer is in the crystal phase.
摘要翻译：相变光盘介质包括盘状基板（2）和由包括相变层（5）的多个薄层的叠层形成的记录层（3）。信息标记通过从结晶相到非晶相的相变记录在相变层上，反之亦然。记录层具有用于记录由分别采用交替的凹凸形状的槽部（9）和岸台部（8）形成的信息标记的轨道。轨道的间隔范围为0.54〜0.64μm，记录层的光反射率为 1，当相变层处于晶相时。

10. 发明公开

EP0936603A2 Optical head 有权
标题翻译：光学头
公开(公告)号：EP0936603A2
公开(公告)日：1999-08-18
申请号：EP99301040.4
申请日：1999-02-12
申请人： Hitachi, Ltd.
发明人： Shimano, Takeshi , Nakamura, Shigeru , Ohnishi, Kunikazu , Inoue, Masayuki , Fukui, Yukio
IPC分类号： G11B7/12
CPC分类号： G11B7/1353 , G11B7/00718 , G11B7/0903 , G11B7/0909 , G11B7/094 , G11B7/0941 , G11B7/0943 , G11B7/131 , G11B7/1367 , G11B7/1381 , G11B2007/0006
摘要： An optical head eliminates an disturbance which occurs in a focus error signal in association with the decentering of an optical disk (107) when an optical spot crosses a track on a storage film surface, and in addition the optical head cancels an off-set which occurs in a tracking error signal in association with the movement of an objective lens (106). In the constitution of the optical head, phases of wave surfaces of ±1st order diffracted lights are shifted by an amount of λ/2 with a common period by using a phase-inverted diffraction grating (701) the phase of which is inverted with a period of Dλ/(2P · NA) in a radial direction of the optical disk (107), thus causing, on the optical disk (107), sub-spots (109, 110) to be located on the same track as a main-spot (108). Taking advantage of this location, focal point shift error signals of the main-spot 108 and the sub-spots (109, 110) are added to each other with an appropriate gain ratio, thereby making it possible to cancel the disturbance which occurs in the focus error signal. Meanwhile, tracking error signals of the main-spot (108) and the sub-spots (109, 110) according to a push-pull method are subtracted from each other with an appropriate gain ratio, thereby making it possible to cancel the off-set.
摘要翻译：当光点与存储膜表面上的轨道相交时，光学头消除了与光盘（107）的偏心相关的聚焦误差信号中出现的干扰，此外光学头消除了偏移伴随着物镜（106）的移动而产生跟踪误差信号。在光学头的构造中，通过使用相位反转衍射光栅（701），±1次衍射光的波面的相位以公共周期偏移量λ/ 2 （107）的半径方向上的Dλ/（2P·NA）的周期，由此在光盘（107）上使子点（109,110）位于相同的轨道上作为主（108）。利用该位置，主点108和子点（109,110）的焦点偏移误差信号以适当的增益比彼此相加，由此可以消除在主点108和子点（109,110）中出现的干扰聚焦误差信号。同时，根据推挽方法的主光点（108）和副光点（109,110）的跟踪误差信号以适当的增益比彼此相减，由此可以消除偏离光点组。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式