Description
N-BK7 Windows, which has transparent range from 330-2100nm. The refractive index is 1.5168 at 587.6nm. The BK7 window has good performance over visible and near IR spectrum for most application.
H-K9L is the equivalent material to N-BK7.
H-K9L products price is better than N-BK7.
N-BK7 Windows SPECIFICATION:
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Material: |
BK7 grade A optical glass or H-K9L |
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Dimension Tolerance: |
+0.0, -0.1mm |
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Thickness Tolerance: |
± 0.1mm |
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Surface quality: |
60/40(Standard), 10/5(High Precision) |
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Clear Aperture: |
>85% |
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Flatness: |
λ(Standard), λ/10(High Precision) per 25mm@633nm |
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Parallelism: |
1' (Standard), 10" (High Precision) |
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Bevel: |
<0.25mm X 45° |
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Coating: |
Upon requirement |
Typical Sizes:
Round Shape
Φ5.0; Φ10.0 ; Φ12.7; Φ15.0; Φ20.0;
Diameter(mm):
Φ25.4; Φ30.0; Φ38.1; Φ50.8; Φ76.2
Square Shape:
5.0x5.0 ; 10.0x10.0 ; 15.0x15.0 ;
WxH(mm)
20.0x20.0; 25.0x25.0; 50.0x50.0
Thickness(mm):
0.5; 1.0; 1.5; 2.0; 3.0;4.0,5.0,6.0,8.0,10.0
