Title:
近赤外線カットフィルタガラス
Document Type and Number:
Japanese Patent JP5605400
Kind Code:
B2
Abstract:
To provide a near infrared cut filter glass which can be used without defects, etc., since crystals hardly form in the glass, even in a case where heat treatment is conducted in a coating process carried out after glass forming or in a step of producing an imaging device using such glass. A near infrared cut filter glass, which comprises, as represented by cation percentage, 25 to 37% of P5+, 16.2 to 25% of Al3+, 0.5 to 40% of R+ (wherein R+ is a total content of Li+, Na+ and K+), 0.5 to 45% of R2+ (wherein R2+ is a total content of Mg2+, Ca2+, Sr2+, Ba2+ and Zn2+), 2 to 10% of Cu2+, and 0 to 1% of Sb3+, and comprising, as represented by anion percentage, 30 to 85% of O2−, and 15 to 70% of F−.
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Inventors:
Hiroyuki Okawa
Hiromi Kondo
Ohara 盛輝
Iida Yuichi
Hiromi Kondo
Ohara 盛輝
Iida Yuichi
Application Number:
JP2012159403A
Publication Date:
October 15, 2014
Filing Date:
July 18, 2012
Export Citation:
Assignee:
Asahi Glass Co., Ltd.
International Classes:
G02B5/22; C03C3/247; C03C4/08
Attorney, Agent or Firm:
Patent business corporation cherry tree international patent firm