Process for generating precision polished non-plannar aspherical

Details Process for generating precision polished non-plannar aspherical Process for generating precision polished non-plannar aspherical

1997-11-26

2000-03-14

Breneman, Bruce

Etching a substrate: processes

Forming or treating optical article

216 26, B29D 1100

Patent

active

06036873&

ABSTRACT:
A method for precision polishing non-planar, aspherical surfaces in substrates having variations in figure which are within an order of about ten wavelengths (10 .lambda.) is performed by coating the non-planar, aspherical surface with a thin, uniform layer of material, single-point-diamond turning the layer to achieve a layer surface with an excellent surface figure, and etching the layer surface down into the substrate to completely remove the layer thereby transferring the excellent surface figure to the substrate.

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