... Research, Aerospace applications, Military applications and Watch industry etc.. Sapphire (Al2O3) is characterized by high optical transparency, wear, ... We offer high volume precision sapphire products, including sapphire wafers, windows, prisms, lenses, substrates, watch glasses and special ... , AR, HR, etc.Note for sapphire window:(1). Custom-made sapphire windows at any size from Φ1.0mm ...