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Starting geometry creation and design method for freeform optics

Author

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  • Aaron Bauer

    (University of Rochester)

  • Eric M. Schiesser

    (University of Rochester)

  • Jannick P. Rolland

    (University of Rochester)

Abstract

We describe a method for designing freeform optics based on the aberration theory of freeform surfaces that guides the development of a taxonomy of starting-point geometries with an emphasis on manufacturability. An unconventional approach to the optimization of these starting designs wherein the rotationally invariant 3rd-order aberrations are left uncorrected prior to unobscuring the system is shown to be effective. The optimal starting-point geometry is created for an F/3, 200 mm aperture-class three-mirror imager and is fully optimized using a novel step-by-step method over a 4 × 4 degree field-of-view to exemplify the design method. We then optimize an alternative starting-point geometry that is common in the literature but was quantified here as a sub-optimal candidate for optimization with freeform surfaces. A comparison of the optimized geometries shows the performance of the optimal geometry is at least 16× better, which underscores the importance of the geometry when designing freeform optics.

Suggested Citation

  • Aaron Bauer & Eric M. Schiesser & Jannick P. Rolland, 2018. "Starting geometry creation and design method for freeform optics," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-04186-9
    DOI: 10.1038/s41467-018-04186-9
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