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Title:
OPTICAL GLASS AND OPTICAL ELEMENT
Document Type and Number:
WIPO Patent Application WO/2021/171950
Kind Code:
A1
Abstract:
[Problem] To provide optical glass and an optical element, each of which has a high internal transmittance and a high refractive index at a wavelength of 460 nm. [Solution] Optical glass, wherein: the mass ratio [(BaO+La2O3+Gd2O3+WO3)/(CaO+SrO+Y2O3)] of the total amount of BaO, La2O3, Gd2O3, and WO3 contained to the total amount of CaO, SrO, and Y2O3 contained is 2.0 or less; the mass ratio [(B2O3+P2O5)/(SiO2+Al2O3)] of the total amount of B2O3 and P2O5 contained to the total amount of SiO2 and Al2O3 contained is 0.10 or less; the total amount [Li2O+Na2O+K2O] of Li2O, Na2O, and K2O contained is 10 mass% or less; and the mass ratio [(Al2O3/(SiO2+ZrO2)] of the amount of Al2O3 contained to the total amount of SiO2 and ZrO2 contained is greater than 0.0000.

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JP5766002Optical glass, glass materials for press molding, optical elements and their manufacturing methods, and bonding optical elements
Inventors:
MIKAMI SHUHEI (JP)
NARITA KAZUHIRO (JP)
FUJIWARA YASUHIRO (JP)
Application Number:
PCT/JP2021/004108
Publication Date:
September 02, 2021
Filing Date:
February 04, 2021
Export Citation:
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Assignee:
HOYA CORP (JP)
International Classes:
C03C3/064; C03C3/066; C03C3/068; G02B1/00
Foreign References:
JPH0624789A1994-02-01
JPS6021828A1985-02-04
JPS6036348A1985-02-25
JPS63230536A1988-09-27
JPH08217484A1996-08-27
JP2001180969A2001-07-03
JP2018118904A2018-08-02
JP2017036187A2017-02-16
JPS62132741A1987-06-16
JP2017190280A2017-10-19
Attorney, Agent or Firm:
MAEDA & SUZUKI (JP)
Download PDF:
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