Precision Mechanical Measurement Of Deep Aspherical Optics

J. T. Appels; Philip Lam

doi:10.1117/12.967113

1 January 1987 Precision Mechanical Measurement Of Deep Aspherical Optics

J. T. Appels, Philip Lam

Proceedings Volume 0802, In-Process Optical Metrology for Precision Machining; (1987) https://doi.org/10.1117/12.967113
Event: Fourth International Symposium on Optical and Optoelectronic Applied Sciences and Engineering, 1987, The Hague, Netherlands

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.

Citation Download Citation

J. T. Appels and Philip Lam "Precision Mechanical Measurement Of Deep Aspherical Optics", Proc. SPIE 0802, In-Process Optical Metrology for Precision Machining, (1 January 1987); https://doi.org/10.1117/12.967113

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