公开(公告)号：US5777975A

公开(公告)日：1998-07-07

申请号：US603766

申请日：1996-02-20

申请人： Syogo Horinouchi ,  Shigeki Takeuchi ,  Hideki Yoshinaka ,  Toshihiro Koga ,  Kazuhiko Higo ,  Hidehiro Kugisaki ,  Fumiaki Beppu ,  Jiro Mimasa

发明人： Syogo Horinouchi ,  Shigeki Takeuchi ,  Hideki Yoshinaka ,  Toshihiro Koga ,  Kazuhiko Higo ,  Hidehiro Kugisaki ,  Fumiaki Beppu ,  Jiro Mimasa

IPC分类号： G02B6/32 ,  G02B6/42 ,  G02B27/28 ,  G11B7/09 ,  G11B7/12 ,  G11B7/13 ,  G11B7/135 ,  G11B7/22 ,  G11B11/105 ,  G11B7/00

CPC分类号： G11B7/1356 ,  G02B27/283 ,  G11B11/10543 ,  G11B7/123 ,  G11B7/131 ,  G11B7/1353 ,  G11B7/1372 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/094 ,  G11B7/0943 ,  G11B7/22

摘要： A light source beam is incident on an optical guide block and converted in its diffusion angle by a diffusion angle conversion film on a second inclined portion of the optical guide block, and reflected by a reflecting film on a first inclined portion. Then, the light is incident on a first beam splitter film on the second inclined portion and split into transmitted light and reflected light. The reflected light is focused an optical disk light reflected from the disc passes through the first beam splitter film, and then is transmitted and reflected by a second beam splitter film on a third inclined portion. This transmitted light is incident on a polarization plane conversion plate between the third inclined portion and a fourth inclined portion, so that P and S polarization components and are transmitted through and reflected by its polarized light splitting portion, respectively. The S polarization component is reflected by its reflecting surface toward light-receiving elements. The reflected light from the second beam splitter film is reflected by a focus error detection element on the second inclined portion, and an incident light-splitting point of the polarized light splitting portion is located between the center of the optical guide block and the light-receiving elements, thereby reducing a light amount loss and also increasing a Kerr rotation angle so that an RF reproduction signal with a high C/N ratio can be obtained.

摘要翻译： 光源光束入射到光导块上，并且通过扩散角转换膜在光导块的第二倾斜部分上被扩散角度转换，并由第一倾斜部分上的反射膜反射。 然后，光入射到第二倾斜部分上的第一分束器膜上并分裂成透射光和反射光。 反射光被聚焦，从盘反射的光盘光通过第一分束器膜，然后在第三倾斜部分上被第二分束器膜透射和反射。 该透射光入射到第三倾斜部分和第四倾斜部分之间的偏振平面转换板上，使得P和S偏振分量分别透射并由其偏振光分离部分反射。 S偏振分量被其反射表面反射到光接收元件。 来自第二分束器膜的反射光由第二倾斜部分上的聚焦误差检测元件反射，并且偏振光分离部分的入射光分离点位于光导块的中心和发光元件之间， 接收元件，从而减少光量损失并且还增加克尔旋转角度，使得可以获得具有高C / N比的RF再现信号。

公开(公告)号：US5870261A

公开(公告)日：1999-02-09

申请号：US950840

申请日：1997-10-15

申请人： Fumiaki Beppu

发明人： Fumiaki Beppu

IPC分类号： G11B5/39

CPC分类号： G11B5/3932 ,  G11B5/3967 ,  G11B5/399

摘要： A magnetoresistive head includes a magnetoresistive element and a for-bias soft magnetic film attached to the magnetoresistive element via a spacer. The for-bias soft magnetic film has an axis of easy magnetization which is set to be non-perpendicular to a direction of a bias magnetic field applied to the for-bias soft magnetic film. The bias magnetic field is generated by a sense current flowing in the magnetoresistive element. With this structure, the for-bias soft magnetic film can be easily magnetically saturated so that a reliable characteristic of the magnetoresistive head is ensured. The axis of easy magnetization of the for-bias soft magnetic film may be inclined to the direction of the bias magnetic field by an angle of equal to or less than 60 degrees. Alternatively, the axis of easy magnetization of the for-bias soft magnetic film may be inclined to the direction of the bias magnetic field by an angle of equal to or less than 15 degrees. Alternatively, the axis of easy magnetization of the for-bias soft magnetic film may be set parallel to the direction of the bias magnetic field.

摘要翻译： 磁阻头包括磁阻元件和通过间隔件附着到磁阻元件的偏置软磁膜。 偏置软磁性膜具有容易磁化的轴，其被设定为与施加到偏置软磁性膜的偏置磁场的方向不垂直。 偏置磁场由在磁阻元件中流动的感测电流产生。 通过这种结构，偏磁软磁膜可以容易地磁饱和，从而确保了磁阻磁头的可靠特性。 偏置软磁性膜的容易磁化轴线可以偏置在60度以上的偏置磁场的方向上。 或者，偏置软磁性膜的容易磁化轴可以倾斜偏置磁场的方向等于或小于15度的角度。 或者，可以将偏置软磁性膜的容易磁化轴设定为与偏置磁场的方向平行。