利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

17 条记录 (耗时 0.009 秒)

    Optical glass, press molding preform, method of manufacturing same, optical element, and method of manufacturing same
    1.
    发明公开
    Optical glass, press molding preform, method of manufacturing same, optical element, and method of manufacturing same 有权
    光学玻璃模坯，涉及它们的制备方法，光学元件和过程及其制备

    公开(公告)号：EP1468973A3

    公开(公告)日：2006-02-08

    申请号：EP04009188.6

    申请日：2004-04-19

    申请人： HOYA CORPORATION

    发明人： Fujiwara, Yasuhiro ,  Zou, Xuelu

    IPC分类号： C03C3/16

    CPC分类号： C03B40/04 ,  C03B7/12 ,  C03B11/12 ,  C03B2215/66 ,  C03B2215/69 ,  C03C3/16

    摘要： The present invention relates to low-dispersion optical glass having a low glass-transition temperature suited to precision press molding, a press molding preform comprised of this glass, a method of manufacturing the same, an optical element, and a method of manufacturing the same. The optical glass comprises, given as molar percentages,28 to 50 percent of P 2 O 5 ; more than 20 percent but not more than 50 percent of BaO; 1 to 20 percent MgO; a sum of Li 2 O, Na 2 O, and K 2 O exceeding 3 percent (with 0 to 25 percent of Li 2 O, greater than or equal to 0 percent and less than 10 percent of Na 2 O, and 0 to 12 percent of K 2 O); more than 0 percent but not more than 15 percent of ZnO; 0 to 25 percent of B 2 O 3 ; 0 to 5 percent of Al 2 O 3 ; 0 to 8 percent of Gd 2 O 3 ; 0 to 20 percent of CaO; 0 to 15 percent of SrO; and 0 to 1 percent of Sb 2 O 3 ; with a sum of oxide contents of P, Ba, Mg, Li, Na, K, Zn, B, Al, Gd, Ca, Sr, and Sb being greater than or equal to 98 percent. The press molding preform is comprised of the optical glass. In the method of manufacturing a press molding preform, a glass melt gob of prescribed weight is separated from a glass melt flow, and the press molding preform comprised of the optical glass is formed with the prescribed weight. In the method of manufacturing an optical element, the press molding preform or the press molding preform manufactured by the above method is heated and precision press molded.

    OPTICAL GLASS, PREFORM FOR PRESS FORMING, OPTICAL ELEMENT, AND PROCESSES FOR PRODUCING THESE
    5.
    发明公开
    OPTICAL GLASS, PREFORM FOR PRESS FORMING, OPTICAL ELEMENT, AND PROCESSES FOR PRODUCING THESE 有权
    光学玻璃，预制件的压力成型，光学元件与方法及其

    公开(公告)号：EP2119682A1

    公开(公告)日：2009-11-18

    申请号：EP08721317.9

    申请日：2008-02-27

    申请人： Hoya Corporation

    发明人： IKENISHI, Mikio

    IPC分类号： C03C3/247 ,  C03B11/00 ,  G02B1/00

    CPC分类号： C03C3/247 ,  C03B11/12 ,  G02B5/226

    摘要： Provided is a low-dispersion optical glass that is formed of a fluorophosphate glass in which the molar ratio of the content of O 2- to the content of P 5+ , O 2- /P 5+ , is 3.5 or more and that has an Abbe's number (ν d ) of over 70 or has an F - content of 65 anionic % or more, and the optical glass enables the suppression of the volatilization of a glass component when an optical glass formed of a fluorophosphate glass is produced or when an obtained glass in a molten state is caused to flow out to shape it into a glass shaped material, so that the variation of properties such as a refractive index, etc., involved in the fluctuations of a glass composition and the variation of quality such as the occurrence of striae can be suppressed.