Shanghai Dream Lasers Technology - DPSS Green, Blue & Red Lasers, Precision Optics and Crystals

Optical Specifications

Optical Materials

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Cleaning Optics

Introduction	Material Table	BK7	UV Grade Fused Silica	SF11	BaK1
LaSFN9	Optical Crown Glass	F2	Borosilicate Glass (LEBG)	Sapphire	CaF2

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.

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