Precision Optics

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Windows

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BK7 Windows

Specifications
Material: BK7 grade A optical glass
Diameter Tolerance: +0.0, -0.1mm
Thickness Tolerance: 0.2mm
Clear Aperture: >80%
Parallelism: see the table
Surface Quality: 20-10 scratch and dig
Wavefront Distortion: l/10 per 25mm
Bevel: <0.25mm x 45

f (mm)
T (mm)
1' Parallelism
30" Parallelism
10" Parallelism
Part No
Part No.
Part No
10.0
6.0
WN0101
WN0111
WN0121
12.7
6.0
WN0102
WN0112
WN0122
25.0
6.0
WN0103
WN0113
WN0123
25.4
6.35
WN0104
WN0114
WN0124
30.0
6.0
WN0105
WN0115
WN0125
50.0
10.0
WN0106
WN0116
WN0126
Please refer to the Material Chapter for more information about BK7.
Please refer to Coating Chapter for more infomation of coating.
Other sizes and coatings are available upon request.

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