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)