Invention Grant
US08575049B2 Optical glass, glass molded body, optical device and their production methods
有权
光学玻璃，玻璃成型体，光学元件及其制作方法
- Patent Title: Optical glass, glass molded body, optical device and their production methods
- Patent Title (中): 光学玻璃，玻璃成型体，光学元件及其制作方法
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Application No.: US13571539Application Date: 2012-08-10
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Publication No.: US08575049B2Publication Date: 2013-11-05
- Inventor: Yuta Kobayashi , Yoichi Hachitani , Yunoshin Kanayama
- Applicant: Yuta Kobayashi , Yoichi Hachitani , Yunoshin Kanayama
- Applicant Address: JP Tokyo
- Assignee: Hoya Corporation
- Current Assignee: Hoya Corporation
- Current Assignee Address: JP Tokyo
- Agency: Nixon & Vanderhye P.C.
- Priority: JP2006-171569 20060621
- Main IPC: C03C3/155
- IPC: C03C3/155 ; C03C3/068 ; C03C3/066
Abstract:
An optical glass comprising, by mass %, 12 to 30% of total of B2O3 and SiO2, 55 to 80% of total of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3, 2 to 10% of ZrO2, 0 to 15% of Nb2O5, 0 to 15% of ZnO and 0% or more but less than 13% of Ta2O5, wherein the ratio of the content of Ta2O5 to the total content of La2O3, Gd2O3, Y2O3, Yb2O3, ZrO2, Nb2O5 and WO3 is 0.23 or less, the ratio of the total content of La2O3, Gd2O3, Y2O3 and Yb2O3 to the total content of B2O3 and SiO2 is from 2 to 4, the optical glass having a refractive index nd of 1.86 or more and an Abbe's number νd of 38 or more, and a rod-shaped glass shaped material and an optical element formed of the above optical glass each.
Public/Granted literature
- US20120302424A1 OPTICAL GLASS, GLASS MOLDED BODY, OPTICAL DEVICE AND THEIR PRODUCTION METHODS Public/Granted day:2012-11-29
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