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◆◆◆ Product——Windows——BK7
Windows
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Super
Precision
|
High
Precision
|
Standard
Precision
|
Material
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BK7
grade A optical glass
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Size
|
Dia
3.0～200.0mm x thickness 0.3～60.0mm |
Diameter
Tolerance
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0/-0.10mm
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Thickness
Tolerance
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± 0.2mm |
Clear
Aperture
|
|
90% |
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Flatness
( @633nm)
|
λ/10
|
λ/4
|
1λ
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Parallelism
|
10arc
seconds
|
30
arc seconds
|
1
arc minutes
|
Surface
Quality |
20/10scratch
and dig
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40/20scratch
and dig
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60/40scratch
and dig
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Bevel
|
0.25mm
x 45
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Coating
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Available upon request
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