Title:
光学ガラス、プリフォーム、光学素子及びその光学機器
Document Type and Number:
Japanese Patent JP7331092
Kind Code:
B2
Abstract:
An optical glass, comprising according to weight percentage: 0-10% SiO2, 5-25% B2O3, 0-15% ZrO2, 10-25% ZnO, 2-30% TiO2+Nb2O5+WO3, and 30-55% Ln2O3, the Ln2O3 being the total content of La2O3, Gd2O3, Y2O3, and Yb2O3, wherein B2O3/Ln2O3 is 0.3-0.8 and Y2O3/B2O3 is 0.15-2. The present optical glass has a refractive index (nd) of 1.84‑1.87 and an Abbe number (vd) of 38‑41, excellent devitrification resistance and bubble content, and good chemical stability.
Inventors:
Sun Wei
Application Number:
JP2021517468A
Publication Date:
August 22, 2023
Filing Date:
September 28, 2018
Export Citation:
Assignee:
CDGM Glass Company Limited
International Classes:
C03C3/068; C03C3/155; G02B1/00
Domestic Patent References:
| JP2018052800A | ||||
| JP2014210694A | ||||
| JP2011006318A | ||||
| JP2015533773A | ||||
| JP2010248024A | ||||
| JP2006306717A |
Attorney, Agent or Firm:
Patent Attorney Corporation ATEN