Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
Optical glass, a cast between heat, a manufacturing method for the same, an optical element, and a manufacturing method for the same
Document Type and Number:
Japanese Patent JP6338537
Kind Code:
B2
Abstract:
An optical glass includes P2O5, B2O3 and a rare earth oxide as essential components, and in a glass composition based on oxides, the P2O5 content is in the range of over 0 weight % and less than 0.79 weight %, the B2O3 content is in the range of 20-40 weight % and the total content of the rare earth oxide and an oxide selected from the group including of Ta2O5, WO3, TiO2, Nb2O5 and Bi2O3 is in the range of 35-70 weight %. Further, this optical glass has a refractive index (nd) in the range of 1.72-1.83, an Abbe number (υd) in the range of 45-55 and a glass transition temperature (Tg) of 640° C. or less.

Inventors:
Aniniya Masanori
Application Number:
JP2014560805A
Publication Date:
June 06, 2018
Filing Date:
February 06, 2014
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HOYA CORPORATION
International Classes:
C03C3/19; C03B11/00; C03C3/068; C03C3/21; G02B1/00; G02B3/00
Domestic Patent References:
JP2007269584A
JP2002249337A
Foreign References:
US20110237419
Attorney, Agent or Firm:
Patent Service Corporation Patent Office Sykes