Contact-free thermal air bearing slumping
In slumping of glass sheets there needs to be a separation layer between glass and mandrel to keep them from fusing together. Inhomogeneities in that layer and dust trapped between glass and mandrel lead to mid-spatial frequency ripples in the shape of the glass. In this project we are avoiding this problem by using a porous air bearing as the mandrel and floating the glass sheet without any hard contact during the slumping process. See here for background.
Microcombs
Nanometrology
UV filter gratings
Chandra gratings
Interference Lithography
etc.