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

doi:10.1117/12.451322

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: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

50 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.

Original language	English
Title of host publication	Current Developments in Lens Design and Optical Engineering III
Editors	Robert E. Fischer, Warren J. Smith, R. Barry Johnson
Publisher	SPIE
Pages	99-105
Number of pages	7
Volume	4767
ISBN (Print)	9780819445346, 0819445347
DOIs	https://doi.org/10.1117/12.451322
Publication status	Published - 16 Oct 2002
Externally published	Yes
Event	International Symposium on Optical Science and Technology - Seattle, United States Duration: 7 Jul 2002 → 11 Jul 2002 Conference number: 3

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	SPIE
Volume	4767
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	International Symposium on Optical Science and Technology
Country/Territory	United States
City	Seattle
Period	7/07/02 → 11/07/02

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10.1117/12.451322Licence: Unspecified

Cite this

Walker, D. D., Beaucamp, A. T. H., Brooks, D., Freeman, R., King, A., McCavana, G., Morton, R., Riley, D., & Simms, J. (2002). Novel CNC polishing process for control of form and texture on aspheric surfaces. In R. E. Fischer, W. J. Smith, & R. B. Johnson (Eds.), Current Developments in Lens Design and Optical Engineering III (Vol. 4767, pp. 99-105). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 4767). SPIE. https://doi.org/10.1117/12.451322

Walker, D. D. ; Beaucamp, A. T.H. ; Brooks, D. et al. / Novel CNC polishing process for control of form and texture on aspheric surfaces. Current Developments in Lens Design and Optical Engineering III. editor / Robert E. Fischer ; Warren J. Smith ; R. Barry Johnson. Vol. 4767 SPIE, 2002. pp. 99-105 (Proceedings of SPIE - The International Society for Optical Engineering).

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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.",

keywords = "Polishing, surface finishing, Aspheric lenses, Process control, Raster graphics, Spherical lenses, Mirrors, Astronomy, Optical Instrument design, Polishing equipment",

author = "Walker, {D. D.} and Beaucamp, {A. T.H.} and D. Brooks and R. Freeman and A. King and G. McCavana and R. Morton and D. Riley and J. Simms",

year = "2002",

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Walker, DD, Beaucamp, ATH, Brooks, D, Freeman, R, King, A, McCavana, G, Morton, R, Riley, D & Simms, J 2002, Novel CNC polishing process for control of form and texture on aspheric surfaces. in RE Fischer, WJ Smith & RB Johnson (eds), Current Developments in Lens Design and Optical Engineering III. vol. 4767, Proceedings of SPIE - The International Society for Optical Engineering, vol. 4767, SPIE, pp. 99-105, International Symposium on Optical Science and Technology, Seattle, Washington, United States, 7/07/02. https://doi.org/10.1117/12.451322

Novel CNC polishing process for control of form and texture on aspheric surfaces. / Walker, D. D.; Beaucamp, A. T.H.; Brooks, D. et al.

Current Developments in Lens Design and Optical Engineering III. ed. / Robert E. Fischer; Warren J. Smith; R. Barry Johnson. Vol. 4767 SPIE, 2002. p. 99-105 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 4767).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Walker, D. D.

AU - Beaucamp, A. T.H.

AU - Brooks, D.

AU - Freeman, R.

AU - King, A.

AU - McCavana, G.

AU - Morton, R.

AU - Riley, D.

AU - Simms, J.

N1 - Conference code: 3

PY - 2002/10/16

Y1 - 2002/10/16

N2 - 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.

AB - 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.

KW - Polishing

KW - surface finishing

KW - Aspheric lenses

KW - Process control

KW - Raster graphics

KW - Spherical lenses

KW - Mirrors

KW - Astronomy

KW - Optical Instrument design

KW - Polishing equipment

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DO - 10.1117/12.451322

M3 - Conference contribution

AN - SCOPUS:0036986546

SN - 9780819445346

SN - 0819445347

VL - 4767

T3 - Proceedings of SPIE - The International Society for Optical Engineering

SP - 99

EP - 105

BT - Current Developments in Lens Design and Optical Engineering III

A2 - Fischer, Robert E.

A2 - Smith, Warren J.

A2 - Johnson, R. Barry

PB - SPIE

T2 - International Symposium on Optical Science and Technology

Y2 - 7 July 2002 through 11 July 2002

ER -

Walker DD, Beaucamp ATH, Brooks D, Freeman R, King A, McCavana G et al. Novel CNC polishing process for control of form and texture on aspheric surfaces. In Fischer RE, Smith WJ, Johnson RB, editors, Current Developments in Lens Design and Optical Engineering III. Vol. 4767. SPIE. 2002. p. 99-105. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.451322

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

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