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Wed May 17 2017
♤Products > Windows >> BK7 Window

BK7 Window and Wedge

BK7 and N-BK7( a RoHS-compliant form of BK7) are high quality optical glass commonly used for windows, lenses, and prisms where transmission in the range 0.4µm to 1.8µm is desired. It is used for thermally non-critical applications. It has excellent mechanical and optical properties.

N-BK7 transmission curve


- Precision Laser Window
- Mirror Substrate
- Brewster Window
- Round Wedge Prism

Specifications of BK7 Window and Wedge

Diameter Tolerance: +0.0/-0.1 mm
Thickness Tolerance: +0.0/-0.2mm
Surface Quality: 10-5
Clear Aperture: 90% of diameter
Bevel: 0.25mm @45°
Flatness: <λ/10
Parallelism: <10"
Wedge: 30', 1°, 2°, 4°, 8°, 12°+/-10'
Coating: Available upon request


1. N-BK7 Window

NBK10-1, Ø10 x 1 mm BK7 Flat Window


NBK12-3, Ø12.7 x 3 mm BK7 Flat Window


NBK25-6, Ø25.4 x 6 mm BK7 Flat Window


NBK50-9, Ø50.8 x 9 mm BK7 Flat Window


Additional message: qty. coating...


2. N-BK7 Wedged Window

WBK25-0.5, Ø25.4 mm BK7 Wedge 0.5°


WBK25-1, Ø25.4 mm BK7 Wedge 1°


WBK25-2, Ø25.4 mm BK7 Wedge 2°


WBK25-4, Ø25.4 mm BK7 Wedge 4°


WBK25-8, Ø25.4 mm BK7 Wedge 8°


WBK25-12, Ø25.4 mm BK7 Wedge 12°


WBK50-0.5, Ø50.8 mm BK7 Wedge 0.5°


Additional message: qty. coating...


BK7 Window Inquiry

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