Impact of higher order surface irregularity on system-level wavefront variation across the field

Charlie Granger; Kaia Williams; Matthew Brophy; Bryan Carter

doi:10.1117/12.2632452

3 October 2022 Impact of higher order surface irregularity on system-level wavefront variation across the field

Charlie Granger, Kaia Williams, Matthew Brophy, Bryan Carter

Proceedings Volume 12215, Optical Modeling and Performance Predictions XII; 1221502 (2022) https://doi.org/10.1117/12.2632452
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

The influence of surface irregularity on optical system wavefront performance is well established, but typically irregularity analysis and specifications are limited to peak-to-valley or 3rd-order Seidel terms. As optical assembly wavefront specifications become tighter, higher order irregularity may need to be considered, particularly for surfaces away from the system pupil. This work presents a case study of an optical system with tightly controlled wavefront Zernike terms across the field. Using as-built diagnostic testing and optical modeling incorporating Fringe Zernike surface irregularity, higher order rotationally symmetric irregularities are determined to be the root-cause of specific wavefront Zernike failure modes. Sensitivity and tolerancing analysis are used to determine the required surface specification and provide feedback to the fabrication process, improving system first-pass yield.

Conference Presentation

Citation Download Citation

Charlie Granger, Kaia Williams, Matthew Brophy, and Bryan Carter "Impact of higher order surface irregularity on system-level wavefront variation across the field", Proc. SPIE 12215, Optical Modeling and Performance Predictions XII, 1221502 (3 October 2022); https://doi.org/10.1117/12.2632452

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