Magnesium Fluoride Windows（rectangular）

Magnesium fluoride rectangular windows have high transparency and a rectangular shape. It has good light transmittance, excellent mechanical and thermal shock performance, and a high laser damage threshold in the wavelength range of 0.12 μ m-7.5 μ m. Magnesium fluoride crystals are a hard and non deformable material with high resistance to chemical corrosion and birefringence properties. Enable long-term stability and high transparency performance to be maintained. Used to separate the environment on both sides, isolating the interior and exterior of the instrument, thereby protecting internal components. It has good transmittance in the ultraviolet, visible, and infrared fields.

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	Length(mm)	Width(mm)	ThK(mm)	Surface Accuracy	Surface Quality	Parallelism
	Screen Reset 20	Screen Reset 10	Screen Reset 1	Screen Reset 3(1)	Screen Reset 60-40	Screen Reset 3′
More+ Less	20	10	1	3(1)	60-40	3′
Sizes 20mm10mm1mm，Magnesium Fluoride Rectangular Windows Number：PMg02D002 Length(mm)：20 Width(mm)：10 ThK(mm)：1 Surface Accuracy：3(1) Surface Quality：60-40 Parallelism：3′ Clear Aperture：>90% Length Tolerance(mm)：+0.0/-0.1 Width Tolerance(mm)：+0.0/-0.1 Thk Tolerance(mm)：±0.1 Substrate Material：Magnesium fluoride（MgF2） Transmission Range：0.12-7.5μm Bevel(mm)：0.35 Coating：Uncoated REACH：Compliant ROHS：Compliant

Material Data
Optical Properties
Transmission Range	0.12-9μm
Transmittance	>90%@0.193-6μm
Refractive Index	NO=1.566,Ne=1.568@0.13μm NO=1.334,Ne=1.343@5μm
Reflection Loss	11.2%@0.12nm(both surfaces) 5.7%@0.22μm(both surfaces) 5.1%@1μm(both surfaces)
Absorption Coefficienet	40×10-3@2.7μm
Structure	square crystal system
Cleavage Planes	<100>
Physical Properties
Density [g/cm3]	3.177
Melting Point [℃]	1255
Thermal Conductivity [W/(m×K)]	21 //c, 33.6⊥c @ 300K
Thermal Expansion [10-6/K]	13.7//c, 8.9 ⊥c @ 373k
Knoop Hardness [kg/mm2]	415
Specific Heat Capacity [J/(kg×K)]	1003
Dielectric Constant	4.87 //c, 5.44⊥c @ 1MHz
Young's Modulus (E) [GPa]	138.5
Shear Modulus(G) [GPa]	54.66
Bulk Modulus(K) [GPa]	101.32
Poisson Coefficient	0.276
Chemical Properties
Solubility / g/L	0.002g @ 20℃
Molecular Weight / g/mol	62.3018