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Substrate Material: |
N-BK7 glass |
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Outer Diameter: |
Dia 25.4, -0.1/+0mm |
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Thickness: |
6.0,+/-0.1mm |
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Surface Quality: |
Double side fine polished(DSP), 20-10 S/D |
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Clear Aperture: |
>90% of polished surfaces(both) |
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Flatness: |
<Lambda/6@632.8nm over clear aperture |
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Parallelism: |
<1 arc minute |
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Hole Position: |
Single center hole through; +/-0.2mm positioning |
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Direction of Hole Axis: |
0-deg(+/-10 arc minutes); Vertical hole/perpendicular to polished surfaces |
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Hole Diameter: |
Dia 2.00, +/-0.05mm |
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Hole Tapering Angle: |
Straight hole; Not tapered |
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Hole Wall Surface: |
Ground surface(internal wall) |
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Hole Endface: |
Bevelling 0.1mm(chipping <0.1mm) |
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Protection Chamfer: |
0.3mm x 45deg(on ground edge surface) |
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MOQ: |
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