Materials Table-www.dreamlasers.com

Materials Table

Material	Transmission Range (nm)	Index of Refraction	Features
BK7	350 ~ 2000	1.52 @ 550nm	Excellent all-around lens material combining broad transmission with excellent mechanical characteristics.
LaSFN9	420 ~ 2300	1.86 @ 550nm	High-refractive-index flint glass provides more power with less curvature needed.
SF11	420 ~ 2300	1.79 @ 550nm	High-refractive-index flint glass provides more power with less curvature needed.
F2	350 ~ 1900	1.62 @ 550nm	Material represents a good compromise between higher index and acceptable mechanical characteristics.
BaK1	330 ~ 2100	1.57 @ 550nm	Excellent all-around lens material, but has weaker chemical characteristics than BK7.
UV-Grade Fused Silica	180 ~ 2500	1.46 @ 550nm	Material provides excellent ultraviolet transmission and superior mechanical characteristics.
Optical Crown Glass	350 ~ 2500	1.52 @ 550nm	This lower tolerance glass can be used as a mirror substrate or in noncritical applications.
Low-Expansion Borosilicate Glass (LEBG)	375 ~ 2300	1.48 @ 550nm	Excellent thermal stability, low cost, and homogeneity makes LEBG useful for high-temperature windows, mirror substrates, and condenser lenses.
Sapphire	180 ~ 5000	1.77 @ 550nm	Excellent mechanical and thermal characteristics make it a superior window material.
Calcium Fluoride	180 ~ 8000	1.40 @ 5000nm	This popular ultraviolet excimer laser material is used for windows, lenses, and mirror substrates.