What is D263?

D263 is a borosilicate glass of the 1st hydrolytic class from which we produce our microscope cover glasses. Following herewith you will find the most important technical properties of this glass:

Refractive index (nd) = 1,5231 (588 nm)

Coefficient of thermal expansion (20-300 °C) = 72x10-7/K

Transformation temperature (Tg) = 557 °C