Bevel:

Protective as needed

Clear Aperture (%):

85

Clear Aperture CA (mm):

43.18

Diameter (mm):

50.80 +0.00/-0.13

Thickness (mm):

5.00 ±0.13

Coating:

BBAR (2000-13000nm)

Coating Specification:

R_avg <3.0% @ 2 - 13μm
R_abs <6% @ 2 - 13μm

Coefficient of Thermal Expansion CTE (10^-6/°C):

7.57

Density (g/cm³):

5.27

Edges:

Fine Ground

Index of Refraction n_d:

2.631

Knoop Hardness (kg/mm²):

120

Parallelism (arcmin):

<3

Poisson's Ratio:

0.28

Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More

Zinc Selenide (ZnSe)

Surface Flatness (P-V):

λ/20 @ 10.6μm

Surface Quality:

60-40

Type:

Protective Window

Wavelength Range (nm):

2000 - 13000

Young's Modulus (GPa):

67.2

Model Number:

AR213-ZC-W-50-5

50.8mm Dia., 5mm Thick, 2-13μm BBAR Coated, ISP Optics Zinc Selenide (ZnSe) Window | AR213-ZC-W-50-5

Protect your investment.