Substrate Glass: |
BK7 optical glass |
Outer Diameter: |
25.4, -0.1/+0mm |
Thickness: |
6.0, +/-0.2mm |
Hole Process:
(Centered/Vertical) |
Central hole/through - VERTICAL HOLE (0-deg)
Hole Diameter: 1.50 +/-0.05mm
Center position +/-0.1mm
Note: chip control <0.1mm |
Surface Quality: |
Double side fine polished; 40-20 scratch and dig |
Flatness: |
< Lamda/8 @ 633nm over clear aperture |
Chamfer: |
< 0.2mm x 45-deg |
Coating: |
Front Surface: Single-side bare gold coating (100nm thick gold processed)
Note: coating process after hole drilled and surfaces repolished Rear Surface: optically polished, same as front surface polished |
Reflectivity: |
R > 97% from 800nm - 20,000nm |
Clear Aperture: |
> 90% of reflective surface |
Pictures:
Front/Back Surfaces: |
 |
Packaging: |
Vacuum packaged(sealed) |