3-D laser metrology for the assessment of curved surface
3-D laser metrology for the assessment of curved surface
Measurement instruments are identified which are suitable for the assessment of curved samples typically used in the manufacture of lens technology. The advantages and limitations of each instrument are discussed, together with their suitability for measuring surfaces and producing data that can be analysed for sphericity information. A number of numerical sphere- fitting algorithms are suggested for radius of curvature analysis, and a Contour Analysis technique is developed for the assessment of errors of Form without the need to sphere-fit to the data. Contour Analysis is shown as a useful visualisation tool, allowing the user to clearly see surface distortions, such as astigmatism, without the need to interpret the deviation from sphere plots.
1853125369
537-548
Computational Mechanics Publications
Cross, K.J.
6d26e05d-3a5d-40bb-9529-4ce7f0c8320d
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
1997
Cross, K.J.
6d26e05d-3a5d-40bb-9529-4ce7f0c8320d
McBride, J.W.
d9429c29-9361-4747-9ba3-376297cb8770
Cross, K.J. and McBride, J.W.
(1997)
3-D laser metrology for the assessment of curved surface.
Ford, D.G. and Postlethwaite, S.R.
(eds.)
In Laser Metrology & Machine Performance III.
vol. 16,
Computational Mechanics Publications.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
Measurement instruments are identified which are suitable for the assessment of curved samples typically used in the manufacture of lens technology. The advantages and limitations of each instrument are discussed, together with their suitability for measuring surfaces and producing data that can be analysed for sphericity information. A number of numerical sphere- fitting algorithms are suggested for radius of curvature analysis, and a Contour Analysis technique is developed for the assessment of errors of Form without the need to sphere-fit to the data. Contour Analysis is shown as a useful visualisation tool, allowing the user to clearly see surface distortions, such as astigmatism, without the need to interpret the deviation from sphere plots.
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More information
Published date: 1997
Venue - Dates:
International Conference on Laser Metrology and Machine Performance III, Huddersfield, UK, 1997-07-15 - 1997-07-17
Identifiers
Local EPrints ID: 21128
URI: http://eprints.soton.ac.uk/id/eprint/21128
ISBN: 1853125369
PURE UUID: 9902b08d-ea00-40fb-b193-73e3b7d9d7b9
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Date deposited: 03 Nov 2006
Last modified: 16 Dec 2023 02:32
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Contributors
Author:
K.J. Cross
Editor:
D.G. Ford
Editor:
S.R. Postlethwaite
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