35mm Diameter Uncoated, B270 Window

Abbe Number (v_d):

58.3

Bevel:

Protective as needed

Clear Aperture CA (mm):

31.50

Diameter (mm):

35.00 ±0.25

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

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.

Title	Stock Number	Price	Buy
8.0 - 118.0 Optic Height, English Bar-Type Optic Holder	#03-666	$95.25 Qty 10+ $85.75 Request Quote	In Stock ×
7.0 - 67.0 Optic Height, English Bar-Type Optic Holder	#03-669	$91.25 Qty 10+ $82.25 Request Quote	In Stock ×
7.0 - 40.0 Optic Height, English Bar-Type Optic Holder	#03-676	$85.00 Qty 10+ $76.50 Request Quote	In Stock ×
10.0 - 60.0mm Optic Height, Metric Bar-Type Optic Holder	#55-530	$91.25 Qty 10+ $82.25 Request Quote	In Stock ×
2.0 - 35.0mm Optic Dia., Three-Screw Adjustable Ring Mount	#03-668	$51.00 Qty 10+ $46.00 Request Quote	In Stock ×
19.5 - 108.0mm Optic Dia., Three-Screw Adjustable Ring Mount	#03-670	$86.75 Qty 10+ $78.25 Request Quote	In Stock ×
9.5 - 73.0mm Optic Dia., Three-Screw Adjustable Ring Mount	#36-605	$63.75 Qty 10+ $57.50 Request Quote	In Stock ×
4.0 - 36.0mm Optic Dia., Self-Centering Jaw Clamp	#16-077 New ×	$130.00 Qty 5+ $117.00 Request Quote	In Stock ×
5.0 - 100.0mm Optic Dia., Self-Centering Jaw Clamp	#16-078 New ×	$340.00 Qty 5+ $306.00 Request Quote	In Stock ×