Qty 1 55mm x 800 micron Diamond Optic Window, CVD diamond window, optical quality - diameter 55±0.1 mm - flat faces polished, surface roughness <30 nm RMS, - each surface flat within one fringe/cm at 633 nm before mounting, - thickness: 800 µm ¿100/+200 µm, - wedge angle < 0.1° - side faces laser cut