Abbe Number (v_d):

67.8

Bevel:

Protective as needed

Clear Aperture (%):

90

Clear Aperture CA (mm):

22.86

Diameter (mm):

25.40 +0.00/-0.10

Thickness (mm):

1.00 ±0.10

Coating:

NIR II (750 - 1550nm)

Coating Specification:

R_abs ≤1.5% @ 750 - 800nm
R_abs ≤1.0% @ 800 - 1550nm
R_avg ≤0.7% @ 750 - 1550nm

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

0.51 (0 to +100°C)
0.58 (0 to +200°C)

Density (g/cm³):

2.20

Edges:

Fine Ground

Index of Refraction n_d:

1.459

Knoop Hardness (kg/mm²):

591

Parallelism (arcsec):

<5

Poisson's Ratio:

0.17

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

Suprasil® 300

Surface Quality:

10-5

Transmitted Wavefront, P-V:

λ/10

Type:

Protective Window

Wavelength Range (nm):

750 - 1550

Young's Modulus (GPa):

70

25.4mm Dia., 1mm Thick, NIR II Coated Suprasil Window