Use of the 'Precessions'™ process for prepolishing and correcting 2D & 2½D form

David D. Walker, Richard Freeman, Roger Morton, Gerry McCavana, Anthony Beaucamp

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)


The Precessions™ process polishes complex surfaces from the ground state preserving the ground-in form, and subsequently rectifies measured form errors. Our first paper introduced the technology and focused on the novel tooling. In this paper we describe the unique CNC machine tools and how they operate in polishing and correcting form. Experimental results demonstrate both the '2D' and '2½D' form-correction modes, as applied to aspheres with rotationally-symmetric target-form.

Original languageEnglish
Pages (from-to)11787-11795
Number of pages9
JournalOptics Express
Issue number24
Publication statusPublished - 27 Nov 2006
Externally publishedYes


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