Applications of fused silica wedge prisms
UV laser systems
Spectrometers and interferometers
Fluorescence detection and bioinstrumentation
Space optics

Material comparison between fused silica wedge prisms and BK7(K9) wedge prisms
Property	UV Fused Silica	Optical Glass BK7
Main components	SiO2	Borosilicate glass (containing boron oxide and alkali metal oxides)
Crystal structure	Amorphous (isotropic)	Amorphous (isotropic)
Density	~2.2 g/cm³	~2.51 g/cm³
Thermal expansivity	0.55×10⁻⁶/℃ (ultralow)	7.1×10⁻⁶/℃
thermal conductivity	1.38 W/(m·K)	1.11 W/(m·K)