Diffractive lenses modelled as physical structures

James Babington; Andrew Wood

doi:10.1117/12.2596659

12 September 2021 Diffractive lenses modelled as physical structures

James Babington, Andrew Wood

Proceedings Volume 11871, Optical Design and Engineering VIII; 118710H (2021) https://doi.org/10.1117/12.2596659
Event: SPIE Optical Systems Design, 2021, Online Only

Abstract

Hybrid diffractive lenses are an enabling technology that allows the shaping and control of wavefronts by precisely controlled zone structures. In particular, they are extremely useful in the medium and long wave infrared spectral regions for performing colour correction, where the lens element count can be reduced (replacing two heavy and expensive infrared materials with a single element). Yet these surface structures are often modelled in a way that treats the surface purely as an attached phase function and not an actual physical structure. This makes some results dubious and provides a substantial difficulty in assessing and specifying tolerances. In the current presentation, we move to a more physical model based on the ideas of zone decomposition.

Conference Presentation

Citation Download Citation

James Babington and Andrew Wood "Diffractive lenses modelled as physical structures", Proc. SPIE 11871, Optical Design and Engineering VIII, 118710H (12 September 2021); https://doi.org/10.1117/12.2596659

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