Bevel:

Protective as needed

Clear Aperture (%):

85

Clear Aperture CA (mm):

32.38

Diameter (mm):

38.10 +0.00/-0.13

Thickness (mm):

5.00 ±0.13

Coating:

Uncoated

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

6.8

Density (g/cm³):

4.08

Edges:

Fine Ground

Index of Refraction n_d:

2.371

Knoop Hardness (kg/mm²):

210

Parallelism (arcmin):

<3

Poisson's Ratio:

0.27

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

Surface Flatness (P-V):

λ/20 @ 10.6μm

Surface Quality:

60-40

Type:

Protective Window

Wavelength Range (nm):

400 - 12000

Young's Modulus (GPa):

74.5

Model Number:

ZL-W-38-5

38.1mm Dia., 5mm Thick, Uncoated, ISP Optics Zinc Sulfide (ZnS) Window | ZL-W-38-5

Protect your investment.