OPTICAL GLASS, GLASS MATERIAL FOR PRESS MOLDING, OPTICAL ELEMENT, METHOD FOR PRODUCING GLASS MATERIAL FOR PRESS MOLDING, AND METHOD FOR PRODUCING OPTICAL ELEMENT

摘要

Provided are an optical fluorophosphate glass having excellent optical characteristics and also excellent processability, a glass material for press molding and an optical element each including the glass, and methods for producing the glass material and the optical element. The optical glass includes P5+ as a cationic component and O2− and F− as anionic components, wherein the optical glass has a content of F− of 40 anionic % or less, an abrasion factor FA of 420 or higher, and a fragility index value B of 4500 μm−1/2 or lower.

主权项

1. An optical glass comprising P as a cationic component and O2− and F− as anionic components, wherein
the optical glass has a content of F− of 40 anionic % or less, an abrasion factor FA of 420 or higher, and a fragility index value B of 4000 μm−1/2 or lower.