Bevel:

Protective as needed

Clear Aperture (%):

85

Clear Aperture CA (mm):

10.79

Diameter (mm):

12.70 +0.00/-0.13

Thickness (mm):

1.00 ±0.13

Coating:

Uncoated

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

6.0

Density (g/cm³):

7.37

Edges:

Fine Ground

Index of Refraction n_d:

2.45 @ 1μm
2.38 @ 4μm
2.37 @ 10μm
2.21 @ 40μm

Knoop Hardness (kg/mm²):

40.2

Parallelism (arcmin):

<3

Poisson's Ratio:

0.37

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

Surface Flatness (P-V):

λ/10 @ 10.6μm

Surface Quality:

60-40

Type:

Protective Window

Wavelength Range (nm):

700 - 40000

Young's Modulus (GPa):

31

Model Number:

K5-W-12-1

12.7mm Dia., 1mm Thick, Uncoated, ISP Optics Thallium Bromoiodide (KRS-5) Window | K5-W-12-1

Protect your investment.