Absolute characterization of gravity sag for light-weighted optics

Tomasz Lis; Stephen Cheney; H. Philip Stahl

doi:10.1117/12.2636251

3 October 2022 Absolute characterization of gravity sag for light-weighted optics

Tomasz Lis, Stephen Cheney, H. Philip Stahl

Proceedings Volume 12221, Optical Manufacturing and Testing XIV; 1222110 (2022) https://doi.org/10.1117/12.2636251
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Gravity-sag (G-sag) for large space-based telescopes is a critical error budget element that must be taken in consideration. Absolute characterization of gravity sag provides necessary information when testing light weighted optics so that true optical performance can be determined. A method is presented for characterizing G-sag to obtain the 0-G optical surface.

Conference Presentation

Citation Download Citation

Tomasz Lis, Stephen Cheney, and H. Philip Stahl "Absolute characterization of gravity sag for light-weighted optics", Proc. SPIE 12221, Optical Manufacturing and Testing XIV, 1222110 (3 October 2022); https://doi.org/10.1117/12.2636251

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