25mm Square Uncoated, B270 Window

Abbe Number (v_d):

58.3

Bevel:

Protective as needed

Clear Aperture CA (mm):

22.50 x 22.50

Dimensions (mm):

25.00 x 25.00

Thickness (mm):

2.00

Coating:

Uncoated

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

9.4 (+20 to +300°C)

Density (g/cm³):

2.56

Edges:

Fine Ground

Index of Refraction n_d:

1.523

Knoop Hardness (kg/mm²):

500

Poisson's Ratio:

0.22

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

B270

Surface Flatness:

1λ

Surface Quality:

60-40

Type:

Protective Window

Wavelength Range (nm):

360 - 2700

Young's Modulus (GPa):

71.5

Length (mm):

25.00

Width (mm):

25.00

Regulatory Compliance

RoHS 2015:

Compliant

Reach 211:

Compliant

Product Family Description

Large Selection of Sizes
Available Uncoated or with a MgF₂ Anti-Reflection Coating
Custom Sizes Available for Volume OEM Requirements

TECHSPEC® B270 Windows are ideal for commercial applications requiring a thin substrate. Available uncoated or with a MgF₂ Anti-Reflection coating, these windows are often used as a protective element between two environments. Custom sizes and coatings are available for OEM applications.

25mm Square Uncoated, B270 Window

Regulatory Compliance

Product Family Description

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