N-bk7 Windows Optics Crysmit

We are producing and exporting of N-BK7 Windows Optics Crysmit to our patrons. Made from BK7 material, which has transparent range from 330-2100nm. The refractive index is 1.5168 at 587.6nm. The BK7 window has good performance over visible and near IR spectrum for most application.

Material:N-BK7
Typical Diameter (I mm):8.0, 10.0, 12.7, 15.0, 20.0, 25.4, 30.0, 50.8
Typical Thickness (mm):1.0, 2.0, 3.0, 4.0, 6.35
Diameter Tolerance (mm):+0.0/-0.2 (General), +0.0/-0.02 (High Precision)
Thickness Tolerance (mm):A 0.2 (General), A 0.005 (High Precision)
Clear Aperture:>80% (Small Size), >95% (Large Size)
Parallelism:3 min. (General), 3 sec. (High Precision)
Surface Quality:60/40 (General), 10/5 (High Precision)
Flatness (per 633nm):I /4(General), I /10 (High Precision)
Bevel (face width x 45A ):<0.25mm
Coating:Uncoated, AR, HR, PR Coating, etc.