| Substrate: |
Schott B270 glass(improved soda lime glass) |
| Dimension: |
20.0x20.0,-0.2/+0.0mm |
| Thickness: |
2.3,+/-0.1mm |
| Surface Quality: |
Double side fine polished (60-40 scratch and dig, MIL Standard) |
| Flatness: |
< Lambda/4 @ 632.8nm over 25mm on-jig tested |
| Surface Coating: |
Amorphous silicon coating layer, thickness 150 +/-10nm
SiO2 buffer layer 5-10nm, to enhance the adhesion of over coating with glass(SiO2) |
| Back Surface: |
Polished/uncoated |
| Edge Surfaces: |
All edges un-beveled,but with protection chamfer |
| Packing: |
Std Photonik 25.4x25.4T1 case(max 25pcs/case), vacuum packed | |