IPL sapphire crystal, also called IPL light guite, IPL lightguide, IPL crystal are the key optical element for IPL (Intense pulsed light) machine,

which filter the UV wave and reserve the useful wave from 400-1200nm for cosmetic laser, such as hair removal, vascular and acne treatment. 

Sapphire is a single crystal aluminum oxide (Al2O3). Its Mohs hardness is 9, it is one of the hardest materials. Sapphire has good mechanical strength, and it is also transparent from UV to IR spectrum. 

So, it is always used as window material where scratch resistance is required. It is the best choose used for beauty laser IPL machines.

Sapphire crystal material Parameters
	Lattice ConstantLattice Constant	a=4.75 A; c=12.97A
	Transparent Range	180nm ~ 4500nm
	Density	3.98g/cm3
	Mohs Hardness	9
	Melting Point	2030℃
	Thermal Conductivity	0.04W/m/K
	Expansion Coefficient	8.4x10-6/K
	Refractive Index	1.755@1um