CHAT EMAIL

Country/Region
- We have set your country/region to United States
  
  You can change this selection at any time, but products in your cart, saved lists, or quote may be removed if they are unavailable in the new shipping country/region.
  
  Select Your Country/Region
Hello, My Account
- Log In
  
  New to EO? Register.
  
  Welcome !
  
  My Account
  Access Dashboard
  
  My Profile
  Update My Profile
  
  Payment & Shipping
  Address Book, Tax Certificates
  
  Web Orders
  View Past Orders
  
  Saved Lists
  Saved Items for Later
  
  Log Out

See all 38 Products in Family

TECHSPEC^® components are designed, specified, or manufactured by Edmund Optics. Learn More

75mm Diameter Uncoated, B270 Window

Stock #48-414

~~$79.00~~ $55.30

Qty 1-5
~~$79.00~~ $55.30

Qty 6
~~$63.20~~ $44.24

Volume Pricing
Request a Quote

eDrawing: eprt IGES PDF Drawing STEP: step

+ Add to Saved List

Compare

Abbe Number (v_d):

58.3

Diameter (mm):

75.00

Dimensional Tolerance (mm):

±0.25

Thickness (mm):

3.00

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

RoHS 2015:

Compliant

Reach 209:

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.