Refractive index: nd=1.7847@587.6nm
Abbe number: vd=25.76 (high dispersion characteristics)
Transmission range: 400-2500nm (best 450-2000nm)
Relative partial dispersion: 0.0205 (anomalous dispersion characteristics)
Density: 3.86g/cm³ (54% higher than BK7)
Thermal expansivity: 8.2×10-⁶/K (20-300℃)
Knoop hardness: 610kg/mm²

How to choose the right material for a right angle prism by working wavelength?
Material	Transparent Range	Applicable Wavelength	Typical Application
Fused Silica	180nm-2.2μm	UV-NIR (deep UV optimal)	Excimer laser, DUV photolithography
BK7	330nm-2.1μm	VIS-NIR	Laser distance measurement, microscopy, industrial optics
N-SF11	400nm-2.5μm	VIS-SWIR(high dispersion)	Spectrometer, dispersive elements
ZnSe	0.5-22μm	Mid - and far infrared (3-12μm optimal)	CO₂ laser (10.6μm), thermal imaging
Ge	2-23μm	LWIR(8-12um)	Military infrared systems, thermal imaging guides
Si	1.2-15μm	MIR(3-5um)	Infrared thermometry, gas detection