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Proceedings Paper

Precision Mechanical Measurement Of Deep Aspherical Optics
Author(s): J. T. Appels; Philip Lam
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Paper Abstract

Mechanical measurement of deep aspherical optics during fabrication is presented. The center of curvature of the best-fit sphere of the aspherical surface is aligned with the axis of a precision air-bearing rotary table. A Linear Variable Differential Transformer (LVDT) gage measures the difference between the aspherical surface and the best-fit sphere. The data is plotted against the calculated data of the final surface. The measurement is repeatable and accurate to a couple of micrometers, when the aspherical surface departs from its best-fit sphere by 230 micrometers.

Paper Details

Date Published: 1 January 1987
PDF: 4 pages
Proc. SPIE 0802, In-Process Optical Metrology for Precision Machining, (1 January 1987); doi: 10.1117/12.967113
Show Author Affiliations
J. T. Appels, Tucson Optical Research Corporation (United States)
Philip Lam, Tucson Optical Research Corporation (United States)

Published in SPIE Proceedings Vol. 0802:
In-Process Optical Metrology for Precision Machining
Peter Langenbeck, Editor(s)

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