Abstract This invention is concerned with the production of glasses in the Bi 2 O 3 --Ga 2 O 3 system with, preferably, CdO which exhibit high indices of refraction and infrared transmitting capabilities to wavelengths of about 8 microns. The broadest scope of operable glasses involves, in weight percent, about ______________________________________ Bi 2 O 3 40-90
Ga 2 O 3 5-30
CdO 0-35
______________________________________ with the preferred glasses consisting essentially of about______________________________________ Bi 2 O 3 55-85 Ga 2 O 3 7-17 CdO 4-28______________________________________
An infrared transmitting glass consisting essentially, expressed in terms of weight percent on the oxide basis, of about ______________________________________
Bi.sub.2 O.sub.3
40-90
Ga.sub.2 O.sub.3
5-30
CdO 0-35
______________________________________
Claim 2
Dependent Claim
28 words
An infrared transmitting glass consisting essentially, expressed in terms of weight percent on the oxide basis, of about ______________________________________
Bi.sub.2 O.sub.3
40-90
Ga.sub.2 O.sub.3
5-30
CdO 0-35
______________________________________
Claim 3
Dependent Claim
22 words
An infrared transmitting glass according to claim 1 consisting essentially of about ______________________________________
Bi.sub.2 O.sub.3
55-85
Ga.sub.2 O.sub.3
7-17
CdO 4-28
______________________________________
Claim 4
Dependent Claim
41 words
An infrared transmitting glass according to claim 1 also containing up to 30% total of the following compatible metal oxides in the indicated proportions selected from the group of: ______________________________________
Cs.sub.2 O 0-10 GeO.sub.2 0-3
HgO 0-25 Sb.sub.2 O.sub.3
0-4
______________________________________
Claim 5
Dependent Claim
14 words
An infrared transmitting glass according to claim 1 also containing up to 3% chlorine.