Novel CNC polishing process for control of form and texture on aspheric surfaces

D. D. Walker, A. T.H. Beaucamp, D. Brooks, R. Freeman, A. King, G. McCavana, R. Morton, D. Riley, J. Simms

Research output: Contribution to journalConference article

38 Citations (Scopus)

Abstract

We first consider the potential impact of a technology that could deliver polished, accurate aspheric surfaces in a routine and automated manner. We then summarise the technical challenge, and present an appraisal of the performance of the novel 'Precessions' process, which is a major advance in this direction. We outline the design concepts behind the productionized CNC polishing machines which executes the process, and then describe the progress developing strategies to preserve form when polishing ground surfaces, and to correct form on both pre-ground and polished surfaces. Particular consideration is given to resolving the inherent difficulties of control of centres on rotationally-symmetric parts. We then report on experimental results achieved with the machines. Finally, we present our programme to extend the control-algorithms to handle fully free-form surfaces, and draw conclusions about the effectiveness and generality of the 'Precessions' technique.

LanguageEnglish
Pages99-105
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4767
DOIs
Publication statusPublished - 16 Oct 2002
Externally publishedYes
EventCurrent Developments in Lens Design and Optical Engineering III - Seattle, United States
Duration: 8 Jul 20029 Jul 2002
Conference number: 3

Fingerprint

Aspheric Surface
Polishing
polishing
Texture
textures
Textures
Free-form Surface
precession
Control Algorithm
Polishing machines
Experimental Results
Form
Strategy
Concepts
Design

Cite this

Walker, D. D. ; Beaucamp, A. T.H. ; Brooks, D. ; Freeman, R. ; King, A. ; McCavana, G. ; Morton, R. ; Riley, D. ; Simms, J. / Novel CNC polishing process for control of form and texture on aspheric surfaces. In: Proceedings of SPIE - The International Society for Optical Engineering. 2002 ; Vol. 4767. pp. 99-105.
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Novel CNC polishing process for control of form and texture on aspheric surfaces. / Walker, D. D.; Beaucamp, A. T.H.; Brooks, D.; Freeman, R.; King, A.; McCavana, G.; Morton, R.; Riley, D.; Simms, J.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 4767, 16.10.2002, p. 99-105.

Research output: Contribution to journalConference article

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AU - Beaucamp, A. T.H.

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