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Proceedings Paper

Cylindrical "allipse"
Author(s): Willem D. van Amstel; R. Groenewold; T. Goos; J. van Leenders; J. Oomen
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Paper Abstract

Long cylindrical mirror sections with an 'Alliptical' cross- section and an interfoci distance of approximately 1 m can be produced by means of diamond fly cutting. However, because of the finite tool radius, the generated profile is basically not an ellipse, but an equidistant ellipse or 'Allipse'. By numerical ray tracing analysis two unique conjugated 'A-points' can be found that are optically nearly equivalent with pure elliptical focal points. A reversed modeling procedure is used to predict the optimum machine configuration for producing just the required ellipse sections. Optical figure quality, focal line position and straightness are tested by a simple deflectometer set-up.

Paper Details

Date Published: 6 September 1999
PDF: 7 pages
Proc. SPIE 3739, Optical Fabrication and Testing, (6 September 1999); doi: 10.1117/12.360134
Show Author Affiliations
Willem D. van Amstel, Philips Ctr. for Manufacturing Technology (Netherlands)
R. Groenewold, Univ. of Utrecht (Netherlands)
T. Goos, Philips Machinefabrieken (Netherlands)
J. van Leenders, Philips Machinefabrieken (Netherlands)
J. Oomen, Philips Machinefabrieken (Netherlands)


Published in SPIE Proceedings Vol. 3739:
Optical Fabrication and Testing
Roland Geyl; Jonathan Maxwell, Editor(s)

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