N-BK7 Windows

N-BK7 is a pure optical borosilicate-crown glass material. It’s characteristics makes it a good choice for window, substrate or wafer. Its transmission range is useful for the visible spectrum and near IR. Used to protect elements and optical enclosures between two environments, N-BK7 windows are available in a wide range of sizes and thicknesses.

Material N-BK7
Dimension Tolerance +0.1/-0.1mm
Thickness Tolerance +0.2/-0.2mm
Scratch/dig 60/40
Bevel Protective Chamfer
Flatness 4λ per inch standard, ¼λ per inch upon request
Coating As Specified

Important Note

If your requirement is not included in our stock list, please enquire with us as our in-house production facility can quickly and affordably customize off-the-shelf components to a variety of sizes and shapes that will meet standard, precision or high precision quality.

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P/n Size (mm) Thickness (mm) Notes Qty
WBK-D5X1 Dia. 5 1
WBK-P5X5X1 5x5 1
WBK-D10X1 Dia. 10 1
WBK-P10X10X1 10x10 1
WBK-D12.5X1 Dia. 12.5 1
WBK-P12.5X12.5X1 12.5x12.5 1
WBK-D15X1 Dia. 15 1
WBK-P15X15X1 15x15 1
WBK-D20X1 Dia. 20 1
WBK-P20X20X1 20x20 1
WBK-D30X1 Dia. 30 1
WBK-P30X30X1 30x30 1
WBK-D40X1 Dia. 40 1
WBK-P40X40X1 40x40 1
WBK-D50X1 Dia. 50 1
WBK-P50X50X1 50x50 1
WBK-D5X2 Dia. 5 2
WBK-P5X5X2 5x5 2
WBK-D10X2 Dia. 10 2
WBK-P10X10X2 10x10 2
WBK-D12.5X2 Dia. 12.5 2
WBK-P12.5X12.5X2 12.5x12.5 2
WBK-D15X2 Dia. 15 2
WBK-P15X15X2 15x15 2
WBK-D20X2 Dia. 20 2
WBK-P20X20X2 20x20 2
WBK-D30X2 Dia. 30 2
WBK-P30X30X2 30x30 2
WBK-D40X2 Dia. 40 2
WBK-P40X40X2 40x40 2 ¼λ per inch
WBK-P47X54X2 47x54 2
WBK-D50X2 Dia. 50 2
WBK-P50X50X2 50x50 2
WBK-P112X112X2 112x112 2