Substrate Material: |
N-BK7 glass |
Outer Diameter: |
Dia 25.4, -0.1/+0mm |
Thickness: |
6.0,+/-0.1mm |
Surface Quality: |
Double side fine polished(DSP), 20-10 S/D |
Clear Aperture: |
>90% of polished surfaces(both) |
Flatness: |
<Lambda/6@632.8nm over clear aperture |
Parallelism: |
<1 arc minute |
Hole Position: |
Single center hole through; +/-0.2mm positioning |
Direction of Hole Axis: |
0-deg(+/-10 arc minutes); Vertical hole/perpendicular to polished surfaces |
Hole Diameter: |
Dia 3.50, +/-0.05mm |
Hole Tapering Angle: |
Straight hole; Not tapered |
Hole Wall Surface: |
Ground surface(internal wall) |
Hole Endface: |
Bevelling 0.1mm(chipping <0.1mm) |
Protection Chamfer: |
0.3mm x 45deg(on ground edge surface) |
MOQ: |
|