FAQ

Q

What is the advantage of machine tool polishing?

Machine based polishing is a precision and deterministic process: once you achieved high polishing quality, you can routinely repeat it. That is not a case for manual polishing with its hand-defined, non-deterministic nature.


Q

What is the advantage of superpolishing and how is it achieved?

Super polishing – high degree polishing allows minimizing the subsurface damage layer (Beilby layer) that exist on every polished surface. The deeper and finer the polishing, the thinner damaged layer and consequently the less optical absorption of subsurface layer. Best superpolishing results are achieved on precision CMP (chemical mechanical polishing) machines .


Q

Which coating design is best for UV ?

Visit our galery see a “AR coating selection guide”


Q

What is the advantage of IBS coatings?

Ion beam sputtering offers high packing density, low defect fillms due to high a energy deposition process.


Q

Why ion beam pre-cleaning is important?

Ion Beam pre-cleaning allows removing polishing re-deposition layer that is generated by superpolishing process.There is a misconception that superpolishing completely removes the subsurface damage layer. On the surface there is always a so-called polishing re-deposition layer containing traces of both substrate and polishing materials. Completely remove the redeposit can only be a dry ion milling such as Ion Beam Sputter cleaning.