N-BK7 Optical Windows
0.35-2 μm
Uncoated and AR-Coated Versions Available
Laser Quality Polished Surfaces
Features
Laser-grade, suitable for the most demanding applications
≤λ/20 surface flatness and 10-5 scratch-dig
Parallel to less than 5 arc sec for minimal transmitted beam deviation
Broadband AR coatings for visible, or NIR applications
In-house OEM and custom manufacturing solutions
Applications
Laser … etc.
Please contact us for more specific applications and markets.
MicoSpectra also offers Wedged Windows fabricated from N-BK7, UV Fused Silica, and other substrate materials. If you are looking for the wedged windows, please contact us for more information.
| Optical material | N-BK7, eqv. |
| Size | Ø12.5, Ø20, Ø25, Ø25.4, Ø30, Ø40, Ø50, Ø80, Ø110 Thickness, 2mm-5mm Custom size available |
| Size tolerance | Diameter, +0.0/-0.1mm Thickness, ±0.1mm |
| Surface quality | 10-5 Scratch-Dig |
| Surface flatness | < 1/4λ @ 632.8nm < 1/10λ @ 632.8nm* |
| Parallelism | <1 arc min <5 arc sec* |
| Wavelength range | 350 nm - 2.0 μm (Uncoated) |
| AR coating | R<0.2% @ 0° AOI, custom wavelength |
| Clear Aperture | >90% of central dimension |
*For the super high power specifications, please contact us for details.
| Wavelength Range | Substrate Material |
| 350 nm - 2.0 μm | N-BK7 |
| 185 nm - 2.1 μm | UV Fused Silica |
| 150 nm - 5.0 μm | Sapphire |
| 120 nm - 8.0 μm | Magnesium Fluoride (MgF2) |
| 180 nm - 8.0 μm | Calcium Fluoride (CaF2) |
| 3 - 5 μm | Barium Fluoride (BaF2) |
| 600 nm - 16 µm | Zinc Selenide (ZnSe) |
| 1.2 - 8.0 μm | Silicon (Si) |
| 2.0 - 16 μm | Germanium (Ge) |
