N-BK7 Optical Windows
N-BK7 Optical Windows
Our laser grade optical windows have excellent < 30 arc-seconds parallelism resulting in minimal transmitted beam deviation. The windows are available with broadband AR coatings on both sides for use in visible or IR applications.
- Laser-grade, suitable for the most demanding applications
- ≤λ/20 surface flatness and 10-5 scratch-dig
- Parallel to less than 30 arc sec for minimal transmitted beam deviation
- High quality Grade A N-BK7
- Broadband AR coatings for visible, or NIR applications See All Features
| Compare | Description | Drawings, CAD & Specs | Avail. | Price | ||
|---|---|---|---|---|---|---|
 | 05BW40-30 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 12.7 mm, λ/20, Uncoated | |||||
| 05BW40-30AR.14 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 12.7 mm, λ/20, 430-700 nm | |||||
| 05BW40-30AR.18 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 12.7 mm, λ/20, 1000-1550nm | |||||
 | 10BW40-30 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 25.4 mm, λ/20, Uncoated | |||||
| 10BW40-30AR.14 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 25.4 mm, λ/20, 430-700 nm | |||||
| 10BW40-30AR.16 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 25.4 mm, λ/20, 650-1000 nm | |||||
| 10BW40-30AR.18 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 25.4 mm, λ/20, 1000-1550nm | |||||
 | 20BW40-30 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 50.8 mm, λ/20, Uncoated | |||||
| 20BW40-30AR.14 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 50.8 mm, λ/20, 430-700 nm | |||||
| 20BW40-30AR.16 N-BK7 Optical WindowsOptical Window, Parallel, N-BK7, 50.8 mm, λ/20, 650-1000 nm |
Features
High Precision Manufacturing
These N-BK7 parallel windows are manufactured to the highest precision with flatness better than λ/20 for low distortion and < 30 arc second parallelism for exceptionally low beam deviation.
N-BK7 for VIS and NIR Applications
N-BK7 is an excellent lens material for most visible and near infrared applications. It is the most common borosilicate crown optical glass, and it provides great performance at a good value. Its high homogeneity, low bubble and inclusion content, and straightforward manufacturability make it a good choice for transmissive optics.
Broadband Visible Antireflection Coatings
Our AR.14 broadband multilayer antireflection coating markedly improves the transmission efficiency of these lenses by reducing surface reflections over a 430-700 nm wavelength range. This AR coating performs effectively for multiple visible wavelengths and tunable lasers eliminating the need for several sets of optics.
Broadband Multilayer NIR Antireflection Coating
Our AR.16 coating is recommended for NIR applications in the 650-1000 nm range.
Broadband Multilayer IR Antireflection Coating
Our AR.18 coating is for IR applications in the 1000-1550 nm range.
RoHS Compliant
These windows have been tested for dangerous substances like Pb, Cd, Hg, Hex-Cr, PBB, and PBDE and have been found to be in compliance with RoHS allowable levels.
