About ALLVAR
Manufacturer of negative and tailored coefficient of thermal expansion (CTE) alloys. Negative thermal expansion metal exhibits a -30 ppm/degrees Celsius CTE and can be used to compensate for thermal mismatch of other components or lenses. Also offers a tunable CTE alloy (-30 to +8ppm/degrees Celsius). Athermal lens tubes, constant-force load washers, and ultrastable struts.