公开(公告)号：US07184387B2

公开(公告)日：2007-02-27

申请号：US10528677

申请日：2003-09-18

申请人： Bernardus Hendrikus wilhelmus Hendriks ,  Mathijs De Jongh ,  Willem Marie Julia Marcel Coene ,  Coen Theodorus Hubertus Fransiscus Liedenbaum

发明人： Bernardus Hendrikus wilhelmus Hendriks ,  Mathijs De Jongh ,  Willem Marie Julia Marcel Coene ,  Coen Theodorus Hubertus Fransiscus Liedenbaum

IPC分类号： G11B7/135 ,  G02B5/30

CPC分类号： G11B7/1367

摘要： An optical scanning device for scanning an optical record carrier comprising an information layer. Crosstalk cancellation is provided using a phase modulating element (40, 140) for generating a non-rotationally-symmetric phase profile in a subsidiary radiation beam. The phase profile varies with an azimuthal angle measured about the optical axis of the beam portion, the phase profile varying such that successively different phases are introduced in at least five locations which are each at successive azimuthal angles (φ1, φ2, φN) and each at a given radial distance from the optical axis, wherein the phase profile is such that the phases introduced, when taken in modulo 2π form, successively cycle through 0 to 2π at least twice, whereby the subsidiary beam spot is provided with an intensity distribution on the information layer which overlaps that of the side-lobe of the main beam spot.

摘要翻译： 一种用于扫描包括信息层的光学记录载体的光学扫描装置。 使用用于在辅助辐射束中产生非旋转对称相位轮廓的相位调制元件（40,140）来提供串扰消除。 相位轮廓随着围绕光束部分的光轴测量的方位角而变化，相位轮廓变化使得连续不同的相位被引入至少五个位置，每个位置处于连续的方位角（phi <1 / 并且各自在距离光轴的给定的径向距离处，其中相位轮廓使得当以2×2pi为单位时引入的相位 形成，连续地循环0至2pi至少两次，由此辅助光束点在信息层上提供与主光束点的旁瓣重叠的强度分布。

公开(公告)号：US5513057A

公开(公告)日：1996-04-30

申请号：US441712

申请日：1995-05-15

申请人： Victor Zieren ,  Jacobus J. M. Ruigrok ,  Mathijs De Jongh ,  Arnold Broese Van Groenou

发明人： Victor Zieren ,  Jacobus J. M. Ruigrok ,  Mathijs De Jongh ,  Arnold Broese Van Groenou

IPC分类号： G11B5/10 ,  G11B5/255 ,  G11B5/31 ,  G11B5/39 ,  G11B5/48 ,  G11B5/187

CPC分类号： G11B5/3903 ,  G11B5/10 ,  G11B5/255 ,  G11B5/3106 ,  G11B5/48

摘要： Magnetic head unit comprising a magnetic head secured in a housing and having a magnetic head structure provided with a head face and at least one transducing gap terminating in the head face. A wear- resistant layer (31 ) having at least one alignment mark (35, 36, 37) occupying a defined position with respect to the transducing gap is provided on the head face.

摘要翻译： 磁头单元包括固定在壳体中并具有设置有头部面的磁头结构的磁头和至少一个终止于头部表面的换能间隙的磁头。 具有至少一个对准标记（35,36,37）的耐磨层（31）在头面上设置有相对于换能间隙的限定位置。

公开(公告)号：US20060050349A1

公开(公告)日：2006-03-09

申请号：US10528677

申请日：2003-09-18

申请人： Bernardus Hendrikus Hendriks ,  Mathijs De Jongh ,  Willem Coene ,  Coen Liedenbaum

发明人： Bernardus Hendrikus Hendriks ,  Mathijs De Jongh ,  Willem Coene ,  Coen Liedenbaum

IPC分类号： G02B26/08

CPC分类号： G11B7/1367

摘要： An optical scanning device for scanning an optical record carrier comprising an information layer. Crosstalk cancellation is provided using a phase modulating element (40, 140) for generating a non-rotationally-symmetric phase profile in a subsidiary radiation beam. The phase profile varies with an azimuthal angle measured about the optical axis of the beam portion, the phase profile varying such that successively different phases are introduced in at least five locations which are each at successive azimuthal angles (φ1, φ2, φN) and each at a given radial distance from the optical axis, wherein the phase profile is such that the phases introduced, when taken in modulo 2π form, successively cycle through 0 to 2π at least twice, whereby the subsidiary beam spot is provided with an intensity distribution on the information layer which overlaps that of the side-lobe of the main beam spot.

摘要翻译： 一种用于扫描包括信息层的光学记录载体的光学扫描装置。 使用用于在辅助辐射束中产生非旋转对称相位轮廓的相位调制元件（40,140）来提供串扰消除。 相位轮廓随着围绕光束部分的光轴测量的方位角而变化，相位轮廓变化使得连续不同的相位被引入至少五个位置，每个位置处于连续的方位角（phi <1 / 并且各自在距离光轴的给定的径向距离处，其中相位轮廓使得当以2×2pi为单位时引入的相位 形成，连续地循环0至2pi至少两次，由此辅助光束点在信息层上提供与主光束点的旁瓣重叠的强度分布。

公开(公告)号：US06424489B1

公开(公告)日：2002-07-23

申请号：US08690525

申请日：1996-07-31

申请人： Franciscus W. A. Dirne ,  Victor Zieren ,  Arnold Broese Van Groenou ,  Leo-Franciscus M. Van Oorschot ,  Peter Lasinski ,  Mathijs De Jongh ,  Freddy Roozeboom

发明人： Franciscus W. A. Dirne ,  Victor Zieren ,  Arnold Broese Van Groenou ,  Leo-Franciscus M. Van Oorschot ,  Peter Lasinski ,  Mathijs De Jongh ,  Freddy Roozeboom

IPC分类号： G11B5187

CPC分类号： G11B5/3106 ,  G11B5/102 ,  G11B5/255 ,  G11B5/40

摘要： Magnetic head having a head face (5) and comprising a head structure composed of thin layers and provided with a transducing element (E11), in which different materials occurring in different areas are present in the head face. The head face is provided with a first layer (31) of a material which is more sensitive to corrosion than other materials in the head face, and the first layer is provided with a second layer (33) of a wear-resistant material which is more insensitive to corrosion than the material of the first layer. The second layer constitutes a contact face (35) for cooperation with a magnetic tape (7).

摘要翻译： 具有头面（5）的磁头，包括由薄层构成的头部结构，并设置有转印元件（E11），其中在头面中存在不同的区域中出现的不同材料。 头表面设有第一层（31），该第一层（31）具有比头部表面中的其它材料更易于腐蚀的材料，并且第一层设置有耐磨材料的第二层（33） 比第一层的材料更不敏感。 第二层构成与磁带（7）配合的接触面（35）。