19 Nov 2021 N-BK7 is one of the most common glasses used to produce high-quality optical components, especially for the visible spectrum. It contains very few inclusions and is almost free of bubbles. It is a relatively hard material and has uniform transmission through-out the visible and near-infrared spectra and down to 350 nm in the ultraviolet.
Specifications:
| * Dimensional tolerance |
±0.1mm |
| * Thickness tolerance |
±0.1mm |
| * Surface quality |
40-20, 20/10 |
| * Surface flatness |
L/4, L/8 |
| * Parallelism |
1 arcmin |
| * Protective bevel |
0.25mm x45deg |
|
