N-BK7 Windows and H-K9L Windows
Made from BK7 material, 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. N-BK7 is made of by Schott Germany, H-K9L is made by CDGM China.
H-K9L products price is better than N-BK7.
WTS could make customized N-BK7 or H-K9L windows products
N-BK7 Windows and H-K9L Windows SPECIFICATION:
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Material:
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BK7 grade A optical glass or H-K9L
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Dimension Tolerance:
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+0.0, -0.1mm
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Thickness Tolerance:
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± 0.1mm
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Surface quality:
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60/40(Standard), 10/5(High Precision)
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Clear Aperture:
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>85%
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Flatness:
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λ(Standard), λ/10(High Precision) per 25mm@633nm
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Parallelism:
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1' (Standard), 10" (High Precision)
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Bevel:
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<0.25mm X 45°
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Coating:
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Upon requirement
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Typical Sizes:
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Round Shape
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Φ5.0; Φ10.0 ; Φ12.7; Φ15.0; Φ20.0;
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Diameter(mm):
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Φ25.4; Φ30.0; Φ38.1; Φ50.8; Φ76.2
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Square Shape:
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5.0x5.0 ; 10.0x10.0 ; 15.0x15.0 ;
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WxH(mm)
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20.0x20.0; 25.0x25.0; 50.0x50.0
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Thickness(mm):
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0.5; 1.0; 1.5; 2.0; 3.0;
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4.0; 5.0; 6.0; 8.0; 10.0
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