Preferably Pb-free and As-free optical glasses with Tg less than or equal to 500 degree centigrade
First Claim
1. Optical glass having a refractive index nd of 1.48 ≦
- nd≦
1.56, an Abbe number Vd of 64≦
Vd≦
72 and a transformation temperature Tg≦
500°
C., which comprises the following composition (in % by weight);
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Abstract
The present invention relates to preferably lead-free and arsenic-free optical glasses, having a refractive index of 1.48≦nd≦1.56, an Abbe number of 64 ≦vd≦72, a low transformation temperature (Tg≦500° C.) and good ion exchange properties, as well as good chemical resistance and crystallization stability, and comprising the following composition (in % by weight):
The glass may additionally contain standard refining agents. The invention also relates to the use of the optical glasses according to the invention in the application areas of imaging, projection, telecommunications, optical communication technology and/or laser technology.
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Citations
5 Claims
-
1. Optical glass having a refractive index nd of 1.48 ≦
- nd≦
1.56, an Abbe number Vd of 64≦
Vd≦
72 and a transformation temperature Tg≦
500°
C., which comprises the following composition (in % by weight);
- View Dependent Claims (2, 3, 4, 5)
- nd≦
Specification