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See all 38 Products in Family

35mm Diameter Uncoated, B270 Window

Stock #45-642

$32.50

Qty 1-5
$32.50

Qty 6
$26.00

Volume Pricing
Request a Quote

eDrawing: eprt IGES PDF Drawing STEP: step

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Abbe Number (v_d):

58.3

Diameter (mm):

35.00

Dimensional Tolerance (mm):

±0.25

Thickness (mm):

2.00

Coating:

Uncoated

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

9.4

Knoop Hardness (GPa):

542

Young's Modulus (GPa):

71.5

Density (g/cm³):

2.56

Edges:

Ground, Maximum 0.25 Edge Chip

Index of Refraction n_d:

1.522

Poisson's Ratio:

0.22

Substrate:

B270

Surface Flatness:

1λ

Surface Quality:

60-40

Type:

Protective Window

Regulatory Compliance

Reach 191:

Compliant

RoHS 2015:

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 are available for volume OEM quantities and custom coatings to meet your application requirements, please contact our Sales Department for details.