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    • 3. 再颁专利
    • Multilayer optical disk
    • 多层光盘
    • USRE40136E1
    • 2008-03-04
    • US11091006
    • 2005-03-25
    • Masahiko KanekoNobuhiko UmezuKatsuhisa ArataniAriyoshi Nakaoki
    • Masahiko KanekoNobuhiko UmezuKatsuhisa ArataniAriyoshi Nakaoki
    • B32B3/02
    • G11B7/244G11B7/24G11B7/2531G11B7/2534G11B7/257G11B7/258G11B7/2585G11B2007/2571G11B2007/25713Y10T428/21
    • A multilayer optical disk having an information storage layer which can as well as be reproduced by a general purpose reproducing apparatus, for example, a compact disk player, and from which information can be read from other information storage layers by using an exclusive reproducing apparatus. The method of manufacturing a multilayer disk comprises the steps of forming a first substrate having a first information storage area enabling reproduction of information therein with a first light beam having a wavelength of 770 nm to 830 nm; forming a second substrate having a second information storage area enabling reproduction of information therein with a second light beam having a wavelength of 615-655 nm but which is relatively transparent with respect to said first light beam; and bonding said first substrate to said second substrate together without said first and second said information areas facing each other.
    • 具有信息存储层的多层光盘,其可以由通用再现装置(例如,光盘播放器)再现,并且可以通过使用专用再现装置从其它信息存储层读取信息。 制造多层盘的方法包括以下步骤:形成具有第一信息存储区域的第一基板,该第一信息存储区域能够利用波长为770nm至830nm的第一光束再现其中的信息; 形成具有第二信息存储区域的第二基板,所述第二信息存储区域能够利用波长为615-655nm但相对于所述第一光束相对透明的第二光束再现信息; 以及将所述第一基板与所述第二基板结合在一起,而所述第一和第二信息区域彼此面对。
    • 10. 发明授权
    • Recording/reproducing apparatus and a magneto-optical recording medium
for use therewith
    • 记录/再现装置和与其一起使用的磁光记录介质
    • US6064632A
    • 2000-05-16
    • US203629
    • 1998-12-01
    • Ariyoshi NakaokiKatsuhisa ArataniAkira Kouchiyama
    • Ariyoshi NakaokiKatsuhisa ArataniAkira Kouchiyama
    • G11B11/105G11B11/00
    • B82Y10/00G11B11/10534G11B11/10554G11B11/10543
    • A recording/reproducing apparatus for use with a photomagnetic recording medium. The apparatus comprises a magnetic coil and an optical system having a numerical aperture (NA) greater than 0.8 and arranged such that an optical axis thereof traverses the center of the magnetic coil. The photomagnetic recording medium has a magneto-optic recording film and a transparent protective layer having a thickness HCO formed sequentially on a substrate. The magnetic coil and the optical system are arranged on the transparent protective layer side of the photomagnetic recording medium when the photomagnetic recording medium is used with the apparatus and such that a combined distance equal to the thickness HCO and a distance d between a surface of the magnetic coil and an adjacent surface of the photomagnetic recording medium has a value of 0 .mu.m.ltoreq.d.ltoreq.145 .mu.m. The thickness HCO of the transparent protective layer may have a value of 0 .mu.m.ltoreq.HCO.ltoreq.100 .mu.m, and the distance d may have a value not larger than 45 .mu.m. Additionally, an innermost radius Ri of the magnetic coil may have a value of 290 .mu.m or less.
    • 一种与光磁记录介质一起使用的记录/再现装置。 该装置包括磁性线圈和具有大于0.8的数值孔径(NA)的光学系统,并被布置为使得其光轴穿过磁性线圈的中心。 光磁记录介质具有磁光记录膜和在基板上依次形成厚度HCO的透明保护层。 当光磁记录介质与设备一起使用时,磁性线圈和光学系统被布置在光磁记录介质的透明保护层侧上,并且使得等于厚度HCO的组合距离和 磁性线圈和光磁记录介质的相邻表面具有0μm的值=145μm。 透明保护层的厚度HCO可以具有0μmHCO =100μm的值,并且距离d可以具有不大于45μm的值。 此外,磁线圈的最内半径Ri可以具有290μm或更小的值。