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    • 5. 发明授权
    • Pickup apparatus for multi-layer optical disc
    • 多层光盘拾取装置
    • US07619958B2
    • 2009-11-17
    • US11672815
    • 2007-02-08
    • Masahiko UjiieTakayuki HayashiTakuo TanakaSatoshi Kawata
    • Masahiko UjiieTakayuki HayashiTakuo TanakaSatoshi Kawata
    • G11B7/00
    • G11B7/139G11B2007/0013
    • An optical pickup apparatus comprises an orbicular zone forming lens group 14 for forming the section of the laser beam, which is irradiated to an optical disc DK having plural recording layers, into an annular shape, a condenser lens 35 that converges the reflected beam from the optical disc DK, and a pinhole plate 36 having formed thereto a pinhole 36a with a size corresponding to a flux diameter of the reflected beam converged by the condenser lens 35. The orbicular zone forming lens group 14 refracts the laser beam irradiated to the optical disc DK so as to form the section of the laser beam into an annular shape in order that the internal diameter of the annular converged flux formed on the pinhole plate 36a by the reflected beam from the recording layers other than the recording layer having an optical spot formed thereon becomes greater than the diameter of the pinhole 36a.
    • 一种光学拾取装置,包括形成透镜组14的环形区域,用于将激光束的被照射到具有多个记录层的光盘DK的部分形成为环形,聚光透镜35使来自 光盘DK和针孔板36,其具有针孔36a,针孔36a的尺寸对应于由聚光透镜35会聚的反射光束的通量直径。圆形区域形成透镜组14折射照射到光盘的激光束 DK,以便将激光束的截面形成为环形,以便通过形成在具有光点的记录层以外的记录层的反射光束形成在针孔板36a上的环形会聚通量的内径 其上变得大于针孔36a的直径。
    • 7. 发明申请
    • OPTICAL NEAR-FIELD DISTRIBUTION TRANSFER DEVICE
    • 光学近场分布传输设备
    • US20090067028A1
    • 2009-03-12
    • US12097999
    • 2006-12-19
    • Satoshi KawataJun-ichi KatoAtsushi Ono
    • Satoshi KawataJun-ichi KatoAtsushi Ono
    • G02F1/01
    • G02B6/1226G01Q60/22G02B5/008
    • Long-distance transfer of a super-resolution near field can be performed with a wavelength condition of high degree of freedom. Not only an image in same size can be merely transferred, but also a magnified image can be transferred. Thus the processing technique of a near-field image is improved. Small rods are erected at predetermined spacing with one another on a two-dimensional plane. At least the exterior surface of each small rod is made of a predetermined material having a dielectric constant ∈m meeting the condition “∈m≦−∈d” where ∈d is the dielectric constant of the surrounding medium. The axes of the small rods can be extended to a predetermined direction with respect to the two-dimensional plane. An optical near-field is incidented to one end of each small rod.
    • 能够以高自由度的波长条件进行超分辨率近场的长距离传送。 不仅可以转移相同尺寸的图像,还可以转移放大图像。 因此,近场图像的处理技术得到改善。 在二维平面上以预定间隔彼此竖立小杆。 每个小杆的至少外表面由具有介电常数∈m的预定材料制成,满足条件“∈m<= - ∈d”,其中∈d是周围介质的介电常数。 小杆的轴线可以相对于二维平面延伸到预定方向。 光学近场被入射到每个小杆的一端。