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

125mm Dia., 8mm Thick, Uncoated λ/4 N-BK7 Window

See More by SCHOTT Optical Components
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Stock #11-857 Other Coating Options
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€278,00
Qty 1-5
€278,00
Qty 6+
€218,00
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Abbe Number (vd):
64.17
Bevel:
Protective as needed
Clear Aperture (%):
90
Clear Aperture CA (mm):
112.50
Diameter (mm):
125.00 +0.0/-0.25
Thickness (mm):
8.00 ±0.20
Coating:
Uncoated
Coefficient of Thermal Expansion CTE (10-6/°C):
7.1 (-30 to +70°C)
8.3 (+20 to +300°C)
Density (g/cm3):
2.51
Edges:
Fine Ground
Index of Refraction nd:
1.516
Knoop Hardness (kg/mm2):
610
Parallelism (arcmin):
<1
Poisson's Ratio:
0.206
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Surface Flatness:
λ/4
Surface Quality:
60-40
Type:
Protective Window
Wavelength Range (nm):
350 - 2200
Young's Modulus (GPa):
82
Note:
Surface Flatness is specified per inch

Regulatory Compliance

RoHS 2015:
Reach 209:

Product Family Description

  • λ/4 Surface Flatness or TWD
  • Broadband Anti-Reflection Coating Options Available
  • Custom Coatings and Sizes Available for Volume OEM Quantities
  • Also Available with Laser Line V-Coats

TECHSPEC® λ/4 N-BK7 Precision Windows are ideally suited for industrial and low power laser applications. The high tolerance design yields minimal beam distortion and scatter. Broadband coating options extend the range of these precision windows through the visible and near-infrared spectra.

Note: New additions to this product family may be specified with a transmitted wavefront distortion (TWD) specification instead of a surface flatness. For more information on the difference between these two specifications, see our application note on Understanding Optical Windows

Technical Information

 
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