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Starting geometry creation and design method for freeform optics.

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.

SUBMITTER: Bauer A

PROVIDER: S-EPMC5931519 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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Starting geometry creation and design method for freeform optics.

Bauer Aaron A Schiesser Eric M EM Rolland Jannick P JP

Nature communications 20180501 1

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-cla ...[more]

PMID: 29717127

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