会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 46. 发明授权
    • Diffractive optical element and optical head using the same
    • 衍射光学元件和使用其的光学头
    • US07268947B2
    • 2007-09-11
    • US11049232
    • 2005-02-01
    • Teruhiro ShionoHidenori WadaSeiji Nishino
    • Teruhiro ShionoHidenori WadaSeiji Nishino
    • G02B5/18G11B7/00
    • G11B7/1275G02B5/1871G11B2007/0006
    • A diffractive optical element emits substantially zero order diffracted light when light with a wavelength of 0.35 μm to 0.45 μm is incident and emits substantially first-order diffracted light when light with a wavelength of 0.6 μm to 0.7 μm is incident. The diffractive optical element includes a substrate and a grating portion formed on the substrate. The grating portion has a step-wise cross section with any one of levels selected from four levels, five levels and six levels. The diffractive optical element emits substantially zero-order diffracted light when light with a first wavelength λ1 satisfying the relationship: 0.35 μm≦λ1≦0.45 μm is incident and emits substantially first-order diffracted light when light with a second wavelength λ2 satisfying the relationship: 0.6 μm≦λ2≦0.7 μm is incident.
    • 当波长为0.35μm至0.45μm的光入射时,衍射光学元件发射基本为零级的衍射光,并且当入射具有0.6μm至0.7μm波长的光时,发射基本上为一级的衍射光。 衍射光学元件包括基板和形成在基板上的光栅部分。 光栅部分具有从四个级别,五个级别和六个级别中选择的任何一个级别的逐步横截面。 当具有满足以下关系的第一波长λ1的光时,衍射光学元件发射基本为零级的衍射光,即当第二波长λ2的光满足以下条件时,基本上为一级衍射光 关系:0.6 mum <= lambda2 <= 0.7 mum是事件。
    • 49. 发明授权
    • Optical head and recording reproduction method
    • 光头和录像再现方法
    • US06650612B1
    • 2003-11-18
    • US09536910
    • 2000-03-28
    • Keiichi MatsuzakiTeruhiro ShionoKen'ichi KasazumiTetsuo Saimi
    • Keiichi MatsuzakiTeruhiro ShionoKen'ichi KasazumiTetsuo Saimi
    • G11B700
    • G11B7/1275G11B7/1353G11B7/1374G11B7/13922G11B2007/0006
    • An optical head according to the present invention includes: a first light source for emitting light with a first wavelength; a second light source for emitting light with a second wavelength longer than the first wavelength; and an objective lens for focusing the lights with the first and second wavelengths on information recording surfaces of information recording media corresponding to the lights with the respective wavelengths. The objective lens is designed so as to reduce aberration with respect to the light with the first wavelength. An optical-path length from the second light source to the objective lens is allowed to be shorter than that from the first light source to the objective lens so that aberration caused by the objective lens due to chromatic dispersion caused by a material of the objective lens is reduced with respect to the light with the second wavelength. Thus, using a common optical system, recording and/or reproduction can be carried out with respect to the respective information recording media corresponding to the first and second wavelengths. Furthermore, since the common optical system can be used, the optical head can be simplified in configuration and can be reduced in size.
    • 根据本发明的光头包括:用于发射具有第一波长的光的第一光源; 第二光源,用于发射比第一波长长的第二波长的光; 以及用于将具有第一和第二波长的光聚焦在与具有相应波长的光对应的信息记录介质的信息记录表面上的物镜。 物镜被设计为减少相对于具有第一波长的光的像差。 允许从第二光源到物镜的光路长度短于从第一光源到物镜的光路长度,使得由物镜引起的色散引起的由于物镜引起的色差引起的像差 相对于具有第二波长的光而减小。 因此,使用普通的光学系统,可以相对于对应于第一和第二波长的各个信息记录介质执行记录和/或再现。 此外,由于可以使用普通的光学系统,所以可以简化光学头的结构并且可以减小尺寸。