Products

BK7 Windows

Specifications Standard High Precision
Material BK7 Grade A Optical Glass
Dimension Tolerance +0.0/-0.2mm +0.0/-0.02mm
Thickness Tolerance +0.0/-0.2mm +0.0/-0.05mm
Flatness  λ/2@632.8nm  λ/10@632.8nm
Surface Quality 60-40 20-10
Clear Aperture >85% >90%
Parallelism 1 arc min 10 arc sec
Bevel 0.25mm x 45°
Coating Uncoated, AR, HR, PR, etc.


Standard BK7 Window
Round Shape: DiaxT(mm) Φ10.0x3.0, Φ12.7x3.0, Φ15.0x3.0, Φ20.0x3.0, Φ25.0x3.0, Φ25.4x3.0, Φ30.0x3.0, Φ50.8x6.35
Square Shape: WxHxT(mm) 5.0x5.0x1.0, 10.0x10.0x1.0, 15.0x15.0x2.0, 20.0x20.0x2.0, 25.0x25.0x2.0, 50.0x50.0x6.0

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High Precision BK7 Window
Round Shape: DiaxT(mm) Φ10.0x6.0, Φ12.7x6.0, Φ15.0x6.0, Φ20.0x6.0, Φ25.0x6.0, Φ25.4x6.35, Φ30.0x.6.35, Φ50.8x10.0

Note: Other sizes, material and coating are available upon request.