Cer-Vit

Cer-Vit

(ser -vit) trademark a glass-ceramic material that expands and contracts very little when its temperature changes and is thus used in telescope optics.
References in periodicals archive ?
04' E Part of the Royal Observatory, Edinburgh, this telescope uses an Owens-Illinois Cer-Vit 1.
Completed in 1976, the CTIO 4-m has a moving weight of 340 tons and uses a Cer-Vit primary mirror.
Among Jarrett's initial projects was refurbishment of the Rockefeller telescope, including replacing its original primary with a Cer-Vit one.