λ/4 N-BK7 Precision Windows
Original price was: $52.50.$36.75Current price is: $36.75.
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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.
- Circular and Square Sizes from 5mm to 150mm
- 7 Broadband Anti-Reflection Coating Options Available
- World’s Largest selection of Standard N-Bk7 Windows
- Also Available with Ultra-Thin N-BK7 Windows
| Abbe Number (vd) | 64.17 |
|---|---|
| Bevel | Protective as needed |
| Clear Aperture (%) | 90 |
| 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 |
| Surface Quality | 60-40 |
| Young's Modulus (GPa) | 82 |
| Type of Window | Glass |
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