专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明专利

JPS61273750A AUTOMATIC FOCUS CONTROLLER 失效
公开(公告)号：JPS61273750A
公开(公告)日：1986-12-04
申请号：JP11415285
申请日：1985-05-29
申请人： HITACHI LTD
发明人： KOYANAGI HIROAKI , SATO YOSHIO , ITO TETSUO , MIYAMOTO NORIFUMI , SASAKI HIROSHI , SHIMADA SATOSHI , OKADA TEIGO , TSUBOI NOBUYOSHI , NIHEI HIDEKI , NAGAI HAJIME
IPC分类号： G11B15/61 , G11B7/003 , G11B7/09 , G11B15/62
摘要： PURPOSE:To obtain a compact optical head capable of recording and reproducing high-density information and a device which maintains an optimum focus state by providing two heads which irradiate a tape type photorecording medium with light and rotating them at a high speed in a transparent drum around which a tape is wound. CONSTITUTION:Light beams reflected partially by optical tapes 1 and 1' are changed in direction by 90 deg. to incident light through polarization beam splitters 10 and 11 and reflected by total reflecting mirrors 14 and 15 to reach a both- surface total reflecting mirror 16. Then, the luminous flux 2 is passed through a condenser lens 17 and supplied to a detector 19 to detect the position of the optical tape 1 and the luminous flux 3, on the other hand, is supplied to a detector 20 through a condenser lens 18 to detect the position of the optical tape 1'. If the optical tapes 1 and 1' shift in position from focus positions, an electromagnet 10 is put in operation to move up and down a pinch roller 102 to put the optical tapes 1 and 1' at the focus positions. Thus, an optical system is united and the compact optical head is assembled.

72. 发明专利

JPS61194642A INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS61194642A
公开(公告)日：1986-08-29
申请号：JP3475385
申请日：1985-02-22
申请人： HITACHI LTD
发明人： SATO YOSHIO , SHIMADA SATOSHI , SASAKI HIROSHI , TSUBOI NOBUYOSHI , ITO TETSUO , NIHEI HIDEKI , MIYAMOTO NORIFUMI , KOYANAGI HIROAKI , HIRAGA MAKOTO
IPC分类号： B41M5/26 , G11B7/00 , G11B7/0055 , G11B7/24 , G11B7/243 , G11B7/30
摘要： PURPOSE:To obtain a re-writable information recording and reproducing device by giving to a recording medium at least two types of crystal structures in the solid state, holding the crystal structure inherent to one temperature area in the other one, and/or forming the recording medium with metal or alloy causing different volume changes in the crystal state. CONSTITUTION:The recording medium has at least two types of crystal structures in the solid state, holds the crystal structure inherent to one temperature area in the other one, and/or composed of the metal or alloy causing different volume changes. Among electromagnetic beams with different frequencies, the high frequency beam is used for recording and erasing, and the low frequency beam is for reproduction. A beam control means changes the intensity and irradiation time of the beam to record, erase and reproduce information. Thus the re-writable information recording and reproducing can be attained.

73. 发明专利

JPS61194641A INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS61194641A
公开(公告)日：1986-08-29
申请号：JP3475285
申请日：1985-02-22
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 MAKOTO
IPC分类号： G11B7/00 , G11B7/004 , G11B7/0055 , G11B7/30
摘要： PURPOSE:To erase stably a record by giving to a recording medium at least two types of crystal structures in the solid state, holding the crystal structure inherent to one temperature area in the other one, and/or forming the recording medium with metal or alloy causing different volume changes in the crystal structure. CONSTITUTION:The recording medium 1 has at least two types of crystal structures in the solid state, holds the crystal structure inherent to one temperature area in the other one, and composed of the metal or alloy causing different volume changes in the crystal structure. A laser drive circuit 100 is set to each drive level by a signal 112 available from switching a mode by a write, erasure and reproduction mode setting circuit 110, and a laser beam 141 is set to the intensity corresponding to each level and shaped in a beam-like shape by an optical system 200, thereby forming a fine spot on the recording medium 1. A reflected light beam 204 from the recording medium 1 is detected by the photodetector 7 of the optical system 200, and attains a reflection 206. A reflected light intensity correcting circuit 120 corrects the intensities in write, erasure, reproduction modes, whereby a corrected and reflected light intensity 122 is outputted.

74. 发明专利

JPS61133053A Optical information recording device 失效
标题翻译：光信息记录装置
公开(公告)号：JPS61133053A
公开(公告)日：1986-06-20
申请号：JP25488384
申请日：1984-11-30
申请人： Hitachi Ltd
发明人： TSUBOI NOBUYOSHI , ITO TETSUO , SASAKI HIROSHI , SATO YOSHIO , SHIMADA SATOSHI , MIYAMOTO NORIFUMI , NIHEI HIDEKI , KOYANAGI HIROAKI
IPC分类号： G11B7/00 , G11B7/0055 , G11B7/14 , G11B7/30
摘要： PURPOSE: To improve the function of an optical recording and reproducing device by recording and reproducing a signal by means of an approximately circular micro light spot and erasing freely the recorded signal by a rectangular light spot.
CONSTITUTION: A divergent beam emitted from semiconductor lasers 12 and 14 goes to parallel beams (i) and (k) by collimate lenses 22 and 24. Assuming that the semiconductor laser used for recording and reproducing and that used for erasing are 12 and 14, respectively, the parallel beam (i) is shaped so that the aspect ratio of the beam can be minimized by the 1st prism 23, and the aspect ratio goes to approximately '1'. The beam is changed to a right angle by a light synthesizer 32, passes through about the center of a polarization beam spliter 31, a λ/4 plate 4, a mirror 39 and an objective lens 5, and forms an approximately circular light spot in the center of the recording line of a disk. On the other hand, the parallel beam (k) is refracted by the 2nd prism 8 so that its aspect ratio can be maximized, and said ratio goes to approximately 10. This beam passes through the light synthesizer 32, and afterwards it progresses in the same manner as the beam (i) and forms an elliptical light spot having a long diameter in the tangent direction of the recording line of the disk.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过大致圆形的微光点记录和再现信号，通过矩形光点自由擦除记录的信号，提高光学记录和再现装置的功能。构成：从半导体激光器12和14发射的发散光束通过准直透镜22和24进入平行光束（i）和（k）。假设用于记录和再现的和用于擦除的半导体激光器是12和14，分别使平行光束（i）成形为能够通过第一棱镜23使光束的纵横比最小化，并且纵横比变为约'1'。通过光合成器32将光束改变成直角，穿过偏振光束分离器31，λ/ 4板4，反射镜39和物镜5的中心，并形成近似圆形的光点磁盘记录线的中心。另一方面，平行光束（k）被第二棱镜8折射，使得其纵横比可以最大化，并且所述比例变为大约10.该光束通过光合成器32，然后在与光束（i）相同的方式形成在盘的记录线的切线方向上具有长直径的椭圆形光点。

75. 发明专利

JPS61133047A Optical disk device 失效
标题翻译：光盘设备
公开(公告)号：JPS61133047A
公开(公告)日：1986-06-20
申请号：JP25488784
申请日：1984-11-30
申请人： Hitachi Ltd
发明人： SASAKI HIROSHI , SATO YOSHIO , SHIMADA SATOSHI , MIYAMOTO NORIFUMI , TSUBOI NOBUYOSHI , NIHEI HIDEKI , ITO TETSUO , KOYANAGI HIROAKI
IPC分类号： G11B21/10 , G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/09 , G11B7/30 , G11B21/08
摘要： PURPOSE: To obtain the constitution of a recording track applicable to a rewritable optical disk by recording newly data at a position without recording track with a recording track as a reference, recording the recording tacks and erasing sequentially the recorded tracks in the reverse sequence of recording.
CONSTITUTION: A recording medium 1 is rotated by a motor 2 and a rotary spindle 3, and a light beam from a light source 4 is made incident on the recording medium, whereby a necessary tracking is executed with the use of a photodetector 10 and a differential amplifier 11. The inclination of a total reflecting mirror 7 is controlled within a track interval so that the output of the differential amplifier 11 can be minimized. When the track records a signal having a specific frequency, the following detection is made by use of an adder amplifier 52, a band-pass filter 52 for transmitting a track signal and a level detector 53: whether or not a light spot from a convergent lens 8 is projected on the track. Namely, if the light spot is on the track, the output of the adder amplifier passes through the band-pass filter 52, the level detector 53 generates an action signal, and controls the light spot to shift it to the next track.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了获得适用于可重写光盘的记录轨道的结构，通过以无记录轨迹的位置记录新数据作为参考，记录记录并以相反的记录顺序顺序地擦除记录的轨道。构成：记录介质1由马达2和旋转主轴3旋转，来自光源4的光束入射到记录介质上，由此使用光电检测器10和差分放大器11.总反射镜7的倾斜度被控制在磁道间隔内，使得差分放大器11的输出可以最小化。当轨道记录具有特定频率的信号时，使用加法器放大器52，用于发送轨道信号的带通滤波器52和电平检测器53进行以下检测：来自收敛的光点透镜8投影在轨道上。也就是说，如果光点在轨迹上，则加法器放大器的输出通过带通滤波器52，电平检测器53产生动作信号，并且控制光点将其移动到下一个轨道。

76. 发明专利

JPS61133043A Information recording and reproducing system 失效
标题翻译：信息记录和再现系统
公开(公告)号：JPS61133043A
公开(公告)日：1986-06-20
申请号：JP25532784
申请日：1984-12-03
申请人： Hitachi Ltd
发明人： SATO YOSHIO , SHIMADA SATOSHI , SASAKI HIROSHI , TSUBOI NOBUYOSHI , ITO TETSUO , NIHEI HIDEKI , MIYAMOTO NORIFUMI , KOYANAGI HIROAKI
IPC分类号： G11B7/243 , B41M5/26 , G11B7/00 , G11B7/24 , G11B7/30
摘要： PURPOSE: To attain the rewritable information recording and reproducing by employing a new metallic materials, which have no toxicity and are excellent in long-term preservability, as an information recording medium.
CONSTITUTION: Intercrystal dislocation alloy has different crystal structures at a low temperature and a high temperature, and the quenched crystal structure is formed by quenching from high to low temperature. An output beam 20 from the laser source 3 of the 1st frequency is intensity-modulated by a modulator 2, and shaped approximately circular by a coupling lens 4. The beam 20 is condensed on the recording film 2 of an optical disk 30 through a deflection beam spliter 5, a 1/4 wavelength plate 6, an acoustic light modulator 8, deflection beam spliter 13, reflecting mirror 14 and an objective lens 15. Here, the optical disk 30 is composed of a glass or transparent substrate 31 and the intercrystal dislocation alloy film 32, which has at least two stable crystal states at a room temperature, and can be switched reversely.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过使用无毒性，长期保存性优异的新型金属材料作为信息记录介质，来实现可重写信息的记录再现。构成：晶间位错合金在低温和高温下具有不同的晶体结构，淬火的晶体结构由高温淬火形成。来自第一频率的激光源3的输出光束20由调制器2进行强度调制，并由耦合透镜4形成大致圆形。光束20通过偏转被聚集在光盘30的记录膜2上光束分离器5，1/4波长板6，声光调制器8，偏转光束分离器13，反射镜14和物镜15.这里，光盘30由玻璃或透明基板31和晶体位错合金膜32在室温下具有至少两种稳定的晶体状态，并且可以相反地切换。

77. 发明专利

JPS61133037A Optical disk device 失效
标题翻译：光盘设备
公开(公告)号：JPS61133037A
公开(公告)日：1986-06-20
申请号：JP25531984
申请日：1984-12-03
申请人： Hitachi Ltd
发明人： SASAKI HIROSHI , SATO YOSHIO , SHIMADA SATOSHI , MIYAMOTO NORIFUMI , TSUBOI NOBUYOSHI , NIHEI HIDEKI , ITO TETSUO , KOYANAGI HIROAKI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/09
摘要： PURPOSE: To improve a recording density and the reliability of recorded information by recording a tracking track line on a recording medium, and recording an information signal on the tracking line.
CONSTITUTION: Since tracking beams 22 and 24 irradiate a signal-detecting and recording beam 23 on a track outside the inner periphery away from an interval (d), a tracking control is executed on the basis of sequentially recorded track lines 20 and 21 when the signal is recorded on a non-recorded disk. Accordingly a track pitch is regulated by the beam interval 9d), and recorded stably with high density. Tracking detection outputs TA1 and TA2 are applied to a comparator 28, and their output tracking control signal TA3 is applied to a drive circuit 30 through a switching circuit 29 to flow an electric current (i) to the coil 31 of an objective lens driving actuator in accordance with the tracking control signal TA3, thereby executing the tracking control.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过在记录介质上记录跟踪轨迹线，并在跟踪线上记录信息信号，提高记录密度和记录信息的可靠性。构成：由于跟踪光束22和24在远离间隔（d）的内周上的轨道上照射信号检测和记录光束23，所以当基于顺序记录的轨迹线20和21执行跟踪控制时信号记录在未记录的磁盘上。因此，轨道间距由光束间隔9d）调节，并以高密度稳定地记录。跟踪检测输出TA1和TA2被施加到比较器28，并且它们的输出跟踪控制信号TA3通过开关电路29被施加到驱动电路30，以使电流（i）流到物镜驱动致动器的线圈31 根据跟踪控制信号TA3，从而执行跟踪控制。

78. 发明专利

JP2002056506A MAGNETIC DISK DEVICE AND THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JP2002056506A
公开(公告)日：2002-02-22
申请号：JP2000242121
申请日：2000-08-10
申请人： HITACHI LTD
发明人： NAKA YASUHIRO , MIURA HIDEO , KOYANAGI HIROAKI
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To facilitate the narrowing of an end surface opposite a magnetic disk, and to increase reliability by reducing stress and preventing peeling-off in a thin film magnetic head and a magnetic disk device having the thin film magnetic head mounted. SOLUTION: This magnetic disk device is provided with a lower and upper magnetic poles 15 and 3 having an insulating film 13 formed therebetween. The upper magnetic pole 3 is separated into first and second upper magnetic poles 1 and 2, an end surface 1a1 is formed on the first upper magnetic pole 1 oppositely to a disk, and the second upper magnetic pole 2 has a narrow tip part 2a, a wide upper surface part 2c, and an inclined part 2b connecting these two parts, and a peculiar point 2a3 is formed roughly in a square shape.

79. 发明专利

JPH10308003A THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPH10308003A
公开(公告)日：1998-11-17
申请号：JP11394097
申请日：1997-05-01
申请人： HITACHI LTD
发明人： MIYATA SHINGO , KOYANAGI HIROAKI
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of peeling and cracks in an insulating film in contact with an upper magnetic film and between magnetic gap films by specifying the distance of a gap depth region and a relationship between a track width and a throat region for the upper magnetic film, the insulating film and the shape of the throat region. SOLUTION: If the length of a gap depth region is Gd, a track width is Tw and the length of a throat region is Ly-Gd, a relationship of 0.25

80. 发明专利

JPH10275311A MAGNETIC RELUCTANCE EFFECT TYPE MAGNETIC HEAD AND MAGNETIC DISK DEVICE USING THE HEAD 失效
公开(公告)号：JPH10275311A
公开(公告)日：1998-10-13
申请号：JP7958897
申请日：1997-03-31
申请人： HITACHI LTD
发明人： SASADA YUKIO , TANIYAMA AKIRA , KATO ATSUSHI , SHIRAKI KIYONORI , KOYANAGI HIROAKI , IMANAKA RITSU
IPC分类号： G11B5/39
摘要： PROBLEM TO BE SOLVED: To protect the structural film of read elements and to obtain a desired shape and a desired thickness by forming the protective pattern having the film, which has a high chemical resistivity and covers the difference-in-level section of the upper.lower shield film of the read elements located under a write element gap film in the process after the completion of a write element gap film forming. SOLUTION: After an upper section shield film 9 is formed and the processing of a read element section is completed, a write element gap film 10 is formed by an insulating film using the material such as alumina and a first insulating film 11, which is made of an organic insulating resin material, is then formed. During the process above, a protective pattern 17 is formed on the tilted surface and difference-in- level sections of the upper.lower shield film of the read element section to partially cover them. Then, a spiral conductive coil 12 is formed and a second insulating film 13, which is made of an organic insulating resin material, is formed. Then, an upper section magnetic film 14 is formed. Thus, the upper.lower section shield film is protected and the element process is finally completed by forming a protective film 15 made of alumina and a terminal 16.

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