Optical parts and equipment using infrared athermal glasses

摘要

Optical parts and optical equipment, including lenses, mirrors and laser media made of athermal glasses having compositions comprising 0- 13 mol % CdO, 9-24 mol % CdF.sub.2, 5-10 mol % LiF, 30-34.5 mol % AlF.sub. 3 28-33.5 mol % PbF.sub.2, 0-4 mol % KF, 0-6.5 mol % YF.sub.3, and 0-2 mol % LaF.sub.3 and having little or no optical path length change as a function of temperature in the infrared region of 1&mgr;m to 5&mgr;m.