The BK7 window has good performance over visible and near IR spectrum for most application. The refractive index is 1.5168 at 587.6nm.
Specifications:
Dimension Tolerance:
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+0.0/-0.2mm
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Thickness Tolerance:
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±0.2mm(General),±0.05(High Precision)
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Surface Quality:
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60/40(General),10/5(High Precision)
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Clear Aperture:
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>90%
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Flatness:
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λ/2@633nm(General),λ/10@633nm (High Precision)
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Parallelism:
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<3 arc min.(General). <3 arc sec.(High Precision)
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AR Coated:
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Uncoated, AR, HR, PR, etc.
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Typical Sizes:
Round Shape:Diameter(mm):
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Φ5.0;Φ10.0 ;Φ12.7;Φ15.0;Φ20.0; Φ25.4;Φ30.0;Φ38.1;Φ50.8;Φ76.2
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Square Shape:WxH(mm):
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5.0x5.0;10.0x10.0 ;15.0x15.0 ; 20.0x20.0;25.0x25.0;50.0x50.0
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Thickness Tolerance:
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0.5;1.0;1.5;2.0;3.0;4.0; 5.0;6.0;8.0;10.0; 50.0
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