Optical glass, precision press-molding preform, process for...

Details Optical glass, precision press-molding preform, process for... Optical glass, precision press-molding preform, process for...

2006-08-30

2010-02-02

Group, Karl E (Department: 1793)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C501S049000, C501S050000, C501S052000, C501S079000

Reexamination Certificate

active

07655585

ABSTRACT:
Provided is a precision press-molding optical glass that is not easily degraded in quality by the occurrence of an altered layer such as fogging or yellowing on a surface and that comprises B2O3, ZnO, La2O3and ZrO2and contains, by mol %, 0 to less than 0.5% of Li2O, 20 to 50% of B2O3, 0 to 20% of SiO2, 22 to 42% of ZnO, 5 to 24% of La2O3, 0 to 20% of Gd2O3, provided that the total content of La2O3and Gd2O3is 10 to 24%, 0.5 to 10% of ZrO2, 0 to 15% of Ta2O5, 0 to 20% of WO3, 0 to 15% of Nb2O5, 0 to 20% of TiO2, 0 to 10% of Bi2O3, 0 to 10% of GeO2, 0 to 10% of Ga2O3, 0 to 10% of Al2O3, 0 to 10% of BaO, 0 to 10% of Y2O3and 0 to 10% of Yb2O3, the optical glass having an Abbe's number (νd) of at least 35 but less than 40.

REFERENCES:
patent: 2002/0073735 (2002-06-01), Hayashi et al.
patent: 2003/0022782 (2003-01-01), Uehara
patent: 2003/0211929 (2003-11-01), Hayashi et al.
patent: 2004/0106507 (2004-06-01), Kasuga et al.
patent: 2004/0145815 (2004-07-01), Endo
patent: 2004/0220041 (2004-11-01), Isowaki et al.
patent: 2005/0011228 (2005-01-01), Hayashi et al.
patent: 2005/0209085 (2005-09-01), Endo
patent: 2006/0194686 (2006-08-01), Kobayashi et al.
patent: 2008/0119348 (2008-05-01), Hayashi et al.
patent: 2008/0194395 (2008-08-01), Endo
patent: 49-21408 (1974-02-01), None
patent: 9-278480 (1997-10-01), None
patent: 2002-201041 (2002-07-01), None
patent: 2002-362938 (2002-12-01), None
patent: 2004-175632 (2004-06-01), None
patent: 2004-352604 (2004-12-01), None
patent: 2005-47732 (2005-02-01), None
patent: 2005-154260 (2005-06-01), None
patent: 2005-179142 (2005-07-01), None
patent: WO/2005/042424 (2005-05-01), None

Affiliated with

Also associated with

Rating

Optical glass, precision press-molding preform, process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical glass, precision press-molding preform, process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical glass, precision press-molding preform, process for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4222911