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Diameter (mm) : 50.0
Thickness (mm) : 3.3
Index of Refraction n
d : 1.472
Abbe Number (v
d) : 65.65
Coating : Uncoated
Transmission (%) : 90
Surface Flatness : 4 - 6λ
Coefficient of Thermal Expansion CTE (10
-6/°C) : 3.25
Operating Temperature (°C) : 1 hour @ 500; >100 hours @ 450
Resistance to Temperature Difference (K) : 1 hour @ 110; 1-100 hours @ 90; <100 hours @ 80
Thermal Shock (K) : 175
Surface Quality : 80-50
Diameter Tolerance (mm) : ±0.5
Thickness Tolerance (mm) : ±0.2
Transformation Temperature (°C) : 530
Modulus of Elasticity (kN/mm
2) : 63
Density (g/cm
3) : 2.2
Poisson's Ratio : 0.2
Stress-Optical Coefficient (mm
2/N) : 4 x 10
-6Substrate : BOROFLOAT®
Bevel : Protective as needed
Clear Aperture (%) : ≥90
Edges : Ground Edges
Wavelength Range (nm) : 350 - 2000
Type : Protective Window