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All Products / Optics / Windows and Diffusers / Visible Windows / B270 Windows
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

35mm Diameter MgF2 Coated, B270 Window

See More by SCHOTT Optical Components

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Stock #45-255 In Stock
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Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
€52,00
Qty 1-5
€52,00
Qty 6+
€41,50
Volume Pricing
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Specifications

General

Type:
Protective Window

Physical & Mechanical Properties

Bevel:
Protective as needed
Clear Aperture CA (mm):
31.50
Diameter (mm):
35.00 ±0.25
Thickness (mm):
2.00
Edges:
Fine Ground
Knoop Hardness (kg/mm2):
500
Poisson's Ratio:
0.22
Young's Modulus (GPa):
71.5

Optical Properties

Abbe Number (vd):
58.3
Coating:
MgF2 (632.8nm)
Coating Specification:
Ravg ≤1.50% @ 632.8nm (N-BK7)
Index of Refraction (nd):
1.523
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
B270
Surface Flatness (P-V):
1λ
Surface Quality:
60-40
Wavelength Range (nm):
400 - 700
Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification.
10 J/cm2 @ 532nm, 10ns

Material Properties

Coefficient of Thermal Expansion CTE (10-6/°C):
9.4 (+20 to +300°C)
Density (g/cm3):
2.56

Regulatory Compliance

RoHS 2015:
Compliant
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Certificate of Conformance:
View
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REACH 241:
Compliant
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Product Details

  • Large Selection of Sizes
  • Available Uncoated, MgF2, or VIS-NIR Anti-Reflection (AR) Coated
  • Custom Sizes Available for Volume OEM Requirements

TECHSPEC® B270 Windows offer a high transmission from the visible to the near-infrared (NIR). They have a similar refractive index to N-BK7 while being more cost-effective. These windows are often used as a protective element due to their high solarization stability and chemical resistance, making them ideal for standard window applications. TECHSPEC® B270 Windows are available either uncoated or coated with a MgF2 or VIS-NIR Anti-Reflection (AR) Coating. Both circular and square options are offered in various sizes, and custom sizes and coatings are available for OEM applications. 

Technical Information

Compatible Mounts