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1. (WO2018221678) GLASS, OPTICAL GLASS, AND OPTICAL ELEMENT

Pub. No.:    WO/2018/221678    International Application No.:    PCT/JP2018/021039
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Fri Jun 01 01:59:59 CEST 2018
IPC: C03C 3/062
G02B 1/00
Applicants: HOYA CORPORATION
HOYA株式会社
NEGISHI, Tomoaki
根岸 智明
SHOJI, Akihiro
庄司 昂浩
FUKUI, Satoshi
福井 聡史
KUWATANI, Shungo
桑谷 俊伍
SASAKI, Hayato
佐々木 勇人
Inventors: NEGISHI, Tomoaki
根岸 智明
SHOJI, Akihiro
庄司 昂浩
FUKUI, Satoshi
福井 聡史
KUWATANI, Shungo
桑谷 俊伍
SASAKI, Hayato
佐々木 勇人
Title: GLASS, OPTICAL GLASS, AND OPTICAL ELEMENT
Abstract:
[Problem] To provide a glass having good reheat press formability that is suitable for correcting secondary chromatic aberration, an optical glass, and an optical element. [Solution] Silicate glass that has an Abbe number vd of 20-35 and contains P2O5 and Nb2O5, the partial dispersion ratio Pg, F satisfying formula (1-1). Pg, F ≤ -0.00286 x vd + 0.68900 … (1-1)