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    • 9. 发明申请
    • SYNTHESIZED SILICA GLASS FOR OPTICAL COMPONENT
    • 用于光学组件的合成二氧化硅玻璃
    • US20120182622A1
    • 2012-07-19
    • US13367780
    • 2012-02-07
    • Masaaki TAKATALong ShaoKei IwataTomonori Ogawa
    • Masaaki TAKATALong ShaoKei IwataTomonori Ogawa
    • G02B27/12C03B25/00B82Y20/00
    • C03B19/1453C03B2201/04G03F7/70966Y02P40/57
    • The present invention provides a synthetic silica glass for an optical member in which not only a fast axis direction in an optical axis direction is controlled, and a birefringence in an off-axis direction is reduced, but a magnitude of a birefringence in the optical axis direction is controlled to an arbitrary value, such that an average value of a value BR cos 2θxy defined from a birefringence BR and a fast axis direction θxy as measured from a parallel direction to the principal optical axis direction is defined as an average birefringence AveBR cos 2θxy, and when a maximum value of a birefringence measured from a vertical direction to the principal optical axis direction of the optical member is defined as a maximum birefringence BRmax in an off-axis direction, the following expression (1-1) and expression (2-1) are established: −1.0≦AveBR cos 2θxy
    • 本发明提供一种用于光学构件的合成石英玻璃,其不仅控制光轴方向上的快轴方向,并且减少偏轴双折射,而且在光轴上具有双折射的大小 方向被控制为任意值,使得从平行方向到主光轴方向测量的从双折射BR和快轴方向&yt; xy定义的值BR cos 2&amp; t s; xy的平均值被定义为 平均双折射度AveBR cos 2&amp; t s; xy,并且当从垂直方向测量到光学构件的主光轴方向的双折射的最大值被定义为在偏轴方向上的最大双折射率BRmax时,以下表达式(1 -1)和表达式(2-1):-1.0&nlE; AveBR cos 2&thetas; xy <0.0(1-1)0.0&nlE; BRmax&nlE; 1.0(2-1)。