Reflectivity and transmittance are accomplished by improving Surface roughness in micro-region.
Measurement: White Light Interferometer (Zygo - NewView), AFM
RMS of micro region < 0.2nm
This technology can be applied to the following lenses:
Sphere, Plano (as of Apr., 2014)
200µm region on NewView RMS:0.134nm
1µm region on AFM