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A Quartz Lightweight Blank for a TI35 Astrograph
Holding a 362 mm diameter quartz blank in your hand and having the impression that it is made of plastic … it’s fantastic – Fused Silica (Quartz) performs an awesome thermal expansion coefficient of 5.4 x 10-7/℃ , 6 time less than borosilicate glasses, harder enough to allow better figuring process and advantage in terms of strength to density ratio.
462 mm QUARTZ Blank ready to be figured
Fused Silica (Quartz) performs an awesome thermal expansion coefficient of 5.4 x 10-7/℃ , 6 time less than borosilicate glasses, harder enough to allow better figuring process and advantage in terms of strength to density ratio.