Cylindrical "allipse"

Willem D. van Amstel; R. Groenewold; T. Goos; J. van Leenders; J. Oomen

doi:10.1117/12.360134

6 September 1999 Cylindrical "allipse"

Willem D. van Amstel, R. Groenewold, T. Goos, J. van Leenders, J. Oomen

Proceedings Volume 3739, Optical Fabrication and Testing; (1999) https://doi.org/10.1117/12.360134
Event: Optical Systems Design and Production, 1999, Berlin, Germany

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.

Citation Download Citation

Willem D. van Amstel, R. Groenewold, T. Goos, J. van Leenders, and J. Oomen "Cylindrical "allipse"", Proc. SPIE 3739, Optical Fabrication and Testing, (6 September 1999); https://doi.org/10.1117/12.360134

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