Abbe Number (v_d):

72.24

Axis Orientation:

Random

Bevel:

Protective as needed

Birefringence (n_o-n_e):

0.008 for Visible Light Orthogonal to Optical Axis

Clear Aperture (%):

≥90

Clear Aperture CA (mm):

22.50

Diameter (mm):

25.00 ±0.05

Thickness (mm):

1.00 ±0.05

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):

8.8

Density (g/cm³):

3.97

Edges:

Fine Ground

Index of Refraction n_d:

1.77

Knoop Hardness (kg/mm²):

1900

Parallelism (arcmin):

≤3.5

Poisson's Ratio:

0.27

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

Sapphire (Al₂O₃)

Surface Flatness (P-V):

2λ (typical)

Surface Quality:

80-50

Type:

Protective Window

Wavelength Range (nm):

750 - 1550

Young's Modulus (GPa):

435

25mm Dia., 1mm Thick, NIR II AR Coated Sapphire Window

Regulatory Compliance

產品系列說明

25mm Dia., 1mm Thick, NIR II AR Coated Sapphire Window

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Regulatory Compliance

產品系列說明