Reminder of the main stages of production
Achieving precise optical surfaces: manufacturing processes

Before turning to the production technologies, and to make the article easier to read, the following glossary gives the main terms that will be used:

• shape defect: deviation in shape from the desired theoretical surface. The term "flatness" is often used as a synonym for both flat and uneven surfaces;

• PTV: Peak To Valley: the maximum amplitude of the shape defect (maximum – minimum);

• Rms: Root mean square ;

• Ra: term expressing the arithmetic mean deviation ;

• MRF: MagnetoRheological Finishing;

• FJP: Fluid Jet Propulsion.

To create an optical surface, the following main principles apply...