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    Reading optical disks having substrates with diverse axial thicknesses
    3.
    发明授权
    Reading optical disks having substrates with diverse axial thicknesses 失效
    读取具有不同轴向厚度的衬底的光盘

    公开(公告)号：US5621717A

    公开(公告)日：1997-04-15

    申请号：US476739

    申请日：1995-06-07

    Applicant: Blair I. Finkelstein ,  Timothy C. Strand

    Inventor： Blair I. Finkelstein ,  Timothy C. Strand

    IPC: G11B19/12 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/09 ,  G11B7/135

    CPC classification number: G11B7/1381 ,  G11B7/0037 ,  G11B2007/0006

    Abstract: An optical disk player reads either thin-substrate disks or thick-substrate disks. The disk players optical system is designed for reading the thin-substrate optical disks and has an effective numerical aperture. Thick-substrate optical disks having a thicker substrate than the thin-substrate optical disk result in the laser beam reading such thick-substrate optical disks having spherical aberration sufficient to prevent reliable data detection. When thick-substrate optical disks are being read, the read portion of the optical system is automatically changed to accommodate the undesired spherical aberration. The thick-substrate disk reflected laser beam is subjected to annular filtering that reduces spherical aberration sufficiently for enabling data and servo signal detection. Annular filtering is provided in an optical read path by an effective opaque or translucent disk centrally located in a pupil of the laser beam optical filter disposed in the read portion. An apertured plate having an aperture comparable to a known diffraction limited spot size is disposed between the laser beam filter and photo detectors. The apertured plate is disposed in the focal region of a lens in the optical read path.

    Abstract translation: 光盘播放器读取薄基板盘或厚基板盘。 磁盘播放器光学系统设计用于读取薄基板光盘并具有有效的数值孔径。 具有比薄基板光盘更厚的基板的厚基板光盘导致激光束读取具有足以防止可靠数据检测的球面像差的厚基板光盘。 当读取厚基板光盘时，自动改变光学系​​统的读取部分以适应不期望的球面像差。 厚基板盘反射激光束经受环形滤波，足以减少球差，从而实现数据和伺服信号的检测。 通过位于读取部分中的位于激光束光学滤光器的光瞳中心的有效的不透明或半透明光盘在光学读取路径中提供环形滤波。 具有与已知衍射限制光斑尺寸相当的孔径的多孔板设置在激光束过滤器和光电检测器之间。 多孔板设置在光学读取路径中的透镜的聚焦区域中。

    Thermally assisted recording of magnetic media using an optical resonant cavity and nano-pin power delivery device
    4.
    发明授权
    Thermally assisted recording of magnetic media using an optical resonant cavity and nano-pin power delivery device 有权
    使用光学谐振腔和纳米引脚电力输送装置对磁性介质进行热辅助记录

    公开(公告)号：US07724470B2

    公开(公告)日：2010-05-25

    申请号：US11644290

    申请日：2006-12-22

    Applicant: Chie C. Poon ,  Timothy C. Strand

    Inventor： Chie C. Poon ,  Timothy C. Strand

    IPC: G11B5/147

    CPC classification number: G11B5/314 ,  G11B2005/0021

    Abstract: The media heating device of the magnetic head includes an optical resonant cavity and a nano-pin that produces a high intensity near-field optical beam of sub-wavelength dimension adjacent to the write pole. The cavity is fabricated as a planar thin film structure in layers that are generally parallel to the magnetic pole thin film layers of the magnetic head, such that a principal axis of the resonant cavity is parallel to the air bearing surface (ABS). Optical energy is coupled into the resonant cavity through a waveguide that is placed proximate the cavity, and optical energy is coupled out of the cavity through a nano-pin that is disposed between the resonant cavity and the ABS.

    Abstract translation: 磁头的介质加热装置包括光学谐振腔和纳米针，其产生与写入极相邻的亚波长尺寸的高强度近场光束。 该空腔被制造为平面薄膜结构，其平行于磁头的磁极薄膜层，使得谐振腔的主轴平行于空气轴承表面（ABS）。 光能通过放置在腔附近的波导耦合到谐振腔中，并且光能通过设置在谐振腔和ABS之间的纳米针耦合到空腔外。

    LASER POWER SENSOR FOR THERMALLY ASSISTED MAGNETIC RECORDING
    5.
    发明申请
    LASER POWER SENSOR FOR THERMALLY ASSISTED MAGNETIC RECORDING 有权
    用于热辅助磁记录的激光电源传感器

    公开(公告)号：US20090225464A1

    公开(公告)日：2009-09-10

    申请号：US12042230

    申请日：2008-03-04

    Applicant: Jia-Yang Juang ,  Timothy C. Reiley ,  Timothy C. Strand

    Inventor： Jia-Yang Juang ,  Timothy C. Reiley ,  Timothy C. Strand

    IPC: G11B13/04 ,  G11B5/00 ,  G11B13/00

    CPC classification number: G11B5/40 ,  G11B5/314 ,  G11B5/455 ,  G11B5/6064 ,  G11B5/607 ,  G11B2005/0005 ,  G11B2005/0021

    Abstract: An apparatus, system, and method for measuring thermally induced electric resistance changes in thermally assisted magnetic recording are disclosed for monitoring laser light output in thermally assisted magnetic recording disk drives. An electrical lead is coupled to a read/write head element. A first electrical resistance in the read/write head element is measured. The read/write head is heated by a laser and a second electrical resistance in the read/write head element is measured. The electrical resistance may be monitored at regular intervals when the read/write head element is on the ramp or the electrical resistance measurements may be continuously monitored as the read/write head flies over the magnetic media.

    Abstract translation: 公开了一种用于测量热辅助磁记录中的热感应电阻变化的装置，系统和方法，用于监测热辅助磁记录盘驱动器中的激光输出。 电引线耦合到读/写头元件。 测量读/写头元件中的第一电阻。 读/写头被激光加热，并且测量读/写头元件中的第二电阻。 当读/写头元件在斜坡上时，可以以规则的间隔监视电阻，或者当读/写头飞越磁介质时可以连续监视电阻测量。

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