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11. 发明专利

JPS58188310A Magnetic recording medium and magnetic recording writing and reproducing method 失效
标题翻译：磁记录介质和磁记录写和复制方法
公开(公告)号：JPS58188310A
公开(公告)日：1983-11-02
申请号：JP7221382
申请日：1982-04-28
申请人： Tdk Corp
发明人： EZAKI KIICHIROU , KANAI HIROSHI , KITAHARA YOSHIMI
IPC分类号： G11B5/02 , G11B5/00 , G11B5/09 , G11B5/127 , G11B11/10 , G11B11/105
CPC分类号： G11B5/127 , G11B5/00 , G11B5/09 , G11B11/10508 , G11B11/10515 , G11B11/10547
摘要： PURPOSE:To improve the S/N ratio at readout, by recording a couple of inverted magnetizing information adjacently on a magnetic recording medium and extracting the differential output of the inverted magnetizing information at reproduction. CONSTITUTION:A pulse is given to a winding 3 of a magnetic recording head 2 having a pair of rectangular magnetic poles 2a, 2b opposing with each other at a gap G on the contact plane to the recording medium to form a pair of rectangular patterns A, B opposing with each other at a distance in response to the gap G on a magnetic layer 1a. At the readout, a light from a light source 5 is irradiated on a recording medium 4(1) via a polarizer 6, a lens 10, and a beam splitter 7. The reflected light receiving the right or left Farady rotatory polarization in response to the magnetization of the domain of the layer 1a is received at a photodetection system 9 through the beam splitter 7, and the differential output is extracted. Thus, S/N ratio is improved in this way.
摘要翻译：目的：为了提高读出时的S / N比，通过在磁记录介质上相邻地记录一组反向磁化信息，并在再现时提取反向磁化信息的差分输出。构成：将具有一对矩形磁极2a，2b的磁记录头2的绕组3的脉冲施加到与记录介质的接触面上的间隙G处彼此相对以形成一对矩形图案A B相对于磁性层1a上的间隙G在一定距离处彼此相对。在读出时，来自光源5的光通过偏振器6，透镜10和分束器7照射在记录介质4（1）上。响应于接收到右或左法拉第旋转极化的反射光通过分束器7在光检测系统9处接收层1a的畴的磁化，并且提取差分输出。因此，以这种方式改善了S / N比。

12. 发明专利

JPS58188309A Magnetic recording and writing method 失效
标题翻译：磁记录和书写方法
公开(公告)号：JPS58188309A
公开(公告)日：1983-11-02
申请号：JP7221282
申请日：1982-04-28
申请人： Tdk Corp
发明人： EZAKI KIICHIROU , KANAI HIROSHI , KITAHARA YOSHIMI
IPC分类号： G11B5/02 , G11B5/00 , G11B5/09 , G11B5/127 , G11B11/10 , G11B11/105
CPC分类号： G11B5/09 , G11B5/00 , G11B5/127 , G11B11/10508 , G11B11/10515 , G11B11/10547
摘要： PURPOSE:To optimize the information processing of the optical readout and photodetection system, by exciting a magnetic recording head with a pulse sufficiently faster than the moving speed of a magnetic recording medium, generating a recording magnetic field according to the shape of the magnetic recording head and recording two-dimensional information. CONSTITUTION:The pulse having a speed sufficiently faster than the moving speed of the recording medium 1 is given to the magnetic recording head 2 provided with a pair of rectangular magnetic poles 2a, 2b opposed with each other at a gap G on the contact plane to the magnetic recording medium 1, and a pair of magnetic recordings A, B of rectangular pattern opposing with the magnetization with a distance in response to the gap G are formed on a magnetic layer 1a. In handling the magnetic recording itself as bit information, the digital recording and reproducing system is constituted simply and the shape of the head 2 is taken optimum in the readout of the optical system, allowing to simplify the information processing of the readout and photodetection system.
摘要翻译：目的：为了优化光学读出和光电检测系统的信息处理，通过以比磁记录介质的移动速度更快的脉冲激发磁记录头，根据磁记录头的形状产生记录磁场并记录二维信息。构成：具有比记录介质1的移动速度足够快的速度的脉冲被提供给设置有在接触平面上的间隙G处彼此相对的一对矩形磁极2a，2b的磁记录头2到在磁性层1a上形成磁记录介质1，以及与间隙G相对应的距离相对的矩形图案的一对磁记录A，B。在将磁记录本身作为比特信息处理时，数字记录和再现系统简单地构成，并且头2的形状在光学系统的读出中被最佳化，从而简化了读出和光电检测系统的信息处理。

15. 发明专利

JP4185968B2 Magnetic sensor 有权
公开(公告)号：JP4185968B2
公开(公告)日：2008-11-26
申请号：JP2004530516
申请日：2003-02-14
申请人：独立行政法人産業技術総合研究所 , 独立行政法人科学技術振興機構
发明人：好紀十倉 , 佳宏小川 , 浩之山田 , 雅司川崎 , 良夫金子
IPC分类号： G01R33/02 , G01N27/72 , G01R33/032 , G11B5/127 , G11B11/105
CPC分类号： G11C13/06 , G01R33/0325 , G01R33/095 , G11B5/1278 , G11B11/10547

17. 发明专利

JPS61139959A Reproducing method of magnetic recording 失效
标题翻译：磁记录再现方法
公开(公告)号：JPS61139959A
公开(公告)日：1986-06-27
申请号：JP26225384
申请日：1984-12-12
申请人： Canon Inc
发明人： ODA HITOSHI , ONO TAKEO , SASAKI TOYONARI , YONEDA HIROSHI , MIYAWAKI MAMORU
IPC分类号： G11B5/127 , G11B5/49 , G11B11/10 , G11B11/105 , G11B11/115
CPC分类号： G11B11/10 , G11B5/1278 , G11B5/4946 , G11B11/10547 , G11B11/115
摘要： PURPOSE: To reproduce information recorded in plural tracks, by one head, by making a magnetic film for propagating a static magnetic wave adhere closely to a magnetic recording medium, propagating the static magnetic wave to the magnetic film, and reading out the information of the magnetic recording medium.
CONSTITUTION: In a magnetic recording medium 1, digital signals of '0' and '1' are recorded by a difference of a vertical magnetizing direction. In this way, to a magnetic garnet film 3 which has adhered closely to the medium 1, two kinds of bias magnetic fields by a bit '0' and '1' are applied locally. Accordingly, when one group of static magnetic wave 14 is propagated along a train of the medium 1, a wave number spectrum of the static magnetic wave 14 takes two values. Therefore, one group of static magnetic wave 14 passes through under a recording bit of plural tracks in which information has been recorded by magnetization, by which when the static magnetic wave 14 passes through under the bit '1', a laser beam 5 which has been emitted from a semiconductor laser 6 is diffracted, and photodetected by a photodetector 11. On the other hand, when said wave passes through under the bit '0', said beam is not diffracted. In this way, by moving the medium 1, the information on plural tracks can be reproduced.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了通过一个头再现记录在多个轨道中的信息，通过使用于传播静磁波的磁膜紧密地粘附到磁记录介质上，将静磁波传播到磁膜，并读出信息磁记录介质。构成：在磁记录介质1中，通过垂直磁化方向的差记录“0”和“1”的数字信号。以这种方式，对于粘附在介质1附近的磁性石榴石薄膜3，局部地施加了由位0和1构成的两种偏置磁场。因此，当一组静磁波14沿着介质1的列传播时，静磁波14的波数谱具有两个值。因此，一组静磁波14在通过磁化记录了信息的多个磁迹的记录位下穿过，当静磁磁14在位“1”之下通过时，具有从半导体激光器6发射的光被衍射，并由光电检测器11进行光检测。另一方面，当所述波在比特'0'之前通过时，所述光束不被衍射。以这种方式，通过移动介质1，可以再现关于多个轨道的信息。

18. 发明专利

JPS61129754A Magnetic head for reproduction 失效
标题翻译：用于生殖的磁头
公开(公告)号：JPS61129754A
公开(公告)日：1986-06-17
申请号：JP25026684
申请日：1984-11-27
申请人： Fuji Xerox Co Ltd
发明人： SUGINO SO
IPC分类号： G11B11/10 , G11B11/105
CPC分类号： G11B11/10547
摘要： PURPOSE:To suppress the influence of an external magnetic field and to obtain large reproduced output by disposing a fluid liquid contg. pulverous magnetic particles on a magnetic recording medium, reading optically the movement of the pulverous magnetic particles according to a magnetization pattern and reproducing the same. CONSTITUTION:The light emitted from a light source 6 is condensed to a beam by a condenser lens 7. The beam passes through the top surface of a vessel 2 and the liquid 4 and forms a spot 10 of light on the surface of a film 3. A leak magnetic field is generated perpendicularly to a magnetic recording medium 5 if there is the magnetization inversion generated by recording in the medium 5. The leak magnetic field passes through the film 3 and aggregates the magnetic particles suspended in the liquid 4 onto the surface of the film 3 by the gradient of the magnetic field generated by the leak magnetic field. Therefore is there is the magnetization inversion on the surface of the medium 5 right under the spot 10, the aggregation of the pulverous magnetic powder arises in the position of the spot 10 according to the intensity thereof and the light projected from the light source 6 and the light reflected from the film 3 surface arrive at a photodetector 8 while the light are subjected t scattering and absorption according o the degree thereof. The detection of the intensity of the magnetization invertion and magnetization of the medium 5 is thus made possible from the change in the output of the photodetector and the reproduction of the magnetic recording signal is made possible.
摘要翻译：目的：抑制外部磁场的影响，并通过设置流体液体阻力来获得大的再生输出。在磁记录介质上的粉状磁性颗粒，根据磁化模式光学读取粉状磁性颗粒的移动并再现它们。构成：从光源6发射的光通过聚光透镜7被聚光成束。光束穿过容器2的顶表面和液体4，并在膜3的表面上形成光斑10 如果存在通过在介质5中记录产生的磁化反转而产生垂直于磁记录介质5的泄漏磁场。泄漏磁场通过膜3并将悬浮在液体4中的磁性颗粒聚集到表面上通过由漏磁场产生的磁场的梯度来测量膜3。因此，在光点10正下方的介质5的表面上存在磁化反转，粉末磁粉的聚集根据其强度和从光源6投射的光而在光点10的位置出现，从膜3表面反射的光到达光电检测器8，同时光根据其程度进行散射和吸收。因此，可以根据光电检测器的输出的变化来检测磁化反转的强度和介质5的磁化，并且使磁记录信号的再现成为可能。

19. 发明专利

JPS6126953A Magnetic recording signal reproducer 失效
标题翻译：磁记录信号再现器
公开(公告)号：JPS6126953A
公开(公告)日：1986-02-06
申请号：JP14917784
申请日：1984-07-18
申请人： Toshiba Corp
发明人： SAWAZAKI KENICHI
IPC分类号： G11B11/10 , G11B11/105
CPC分类号： G11B11/10547
摘要： PURPOSE:To reproduce with high sensitivity the signals which are recorded magnetically with high density by irradiating the light beams on a magnetic material piece which is provided at a place near a magnetic gap of a magnetic matter with gap or at the inside of said gap and produces easily a magnetooptical effect and detecting the polarization of the reflected or transmitted light. CONSTITUTION:A magnetic recording medium 1 contains a recording layer of an ordinary magnetic material and is driven toward an arrow head against a reproduction head. A magnetic substance 2 is set in contact with the medium 1 for the reproduction head. The substance 2 is made of a magnetic material like ferrite, etc. and has a magnetic gap 2a. A magnetic material piece 3 which produces easily a magnetooptical effect is put on the gap 2a, and the polarizing surface of the piece 3 is rotated when the light made incident in response to the state of magnetization is reflected or transmitted. The light beams of a laser light source 4 are irradiated on the piece 3 through a condenser lens 7. Then the reflected light is made incident on a photodetector 9 with its revolving polarizing surface. A reproduction output 10 corresponding to the signal recorded on the medium 1 is obtained from the output of the detector 9. Thus the signals recorded magnetically with high density can be reproduced with high sensitivity.
摘要翻译：目的：以高灵敏度再现通过将光束照射在设置在具有间隙的磁性物质的磁隙附近的位置处的磁性材料片上或者在所述间隙的内部，以高密度磁性地记录的信号，以及容易产生磁光效应并检测反射或透射光的偏振。构成：磁记录介质1包含普通磁性材料的记录层，并朝向再现磁头朝向箭头头驱动。磁性物质2设置成与用于再现头的介质1接触。物质2由诸如铁氧体等的磁性材料制成，并且具有磁隙2a。将容易产生磁光效应的磁性材料片3放置在间隙2a上，并且当响应于磁化状态入射的光被反射或透射时，片3的偏振面被旋转。激光光源4的光束通过聚光透镜7照射在片3上。然后，反射光以其旋转偏振面入射到光电检测器9上。从检测器9的输出获得对应于记录在介质1上的信号的再现输出10.因此，可以高灵敏度再现高密度磁记录的信号。

20. 发明专利

JPWO2004019051A1 磁気センサー有权
公开(公告)号：JPWO2004019051A1
公开(公告)日：2005-12-15
申请号：JP2004530516
申请日：2003-02-14
申请人：独立行政法人産業技術総合研究所 , 独立行政法人科学技術振興機構
发明人：十倉　好紀 , 好紀十倉 , 川崎　雅司 , 雅司川崎 , 山田　浩之 , 浩之山田 , 佳宏小川 , 佳宏小川 , 金子　良夫 , 良夫金子
IPC分类号： G01R33/02 , G01N27/72 , G01R33/032 , G11B5/127 , G11B11/105
CPC分类号： G11C13/06 , G01R33/0325 , G01R33/095 , G11B5/1278 , G11B11/10547
摘要：記録された磁化のサイズが微小サイズであっても磁気記録が再生可能であり、入射光そのものを光磁気ディスクに照射せずに光磁気ディスクに記録された磁化を直接読み取ることができ、かつS/N比の高い信号を得ることができる磁気センサーを提供する。垂直記録媒体(101)に配置される電気分極を有する磁気センサー素子(102)と、この磁気センサー素子(102)に作用するレーザー光発生手段とを備え、前記磁気センサー素子(102)への前記レーザー光発生手段からの振動数ωのレーザー光(104)の入射により、前記磁気センサー素子(102)から出射する振動数2ωの第2高調波(105)の偏光面の回転角度φの変化により垂直記録媒体(101)の情報を読み出す。

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