Freeform imaging system design with multiple reflection surfaces

Yunfeng Nie; David R. Shafer; Heidi Ottevaere; Hugo Thienpont; Fabian Duerr

doi:10.1117/12.2601240

9 October 2021 Freeform imaging system design with multiple reflection surfaces

Yunfeng Nie, David R. Shafer, Heidi Ottevaere, Hugo Thienpont, Fabian Duerr

Proceedings Volume 11895, Optical Design and Testing XI; 118950F (2021) https://doi.org/10.1117/12.2601240
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

We present a generalized differentiable ray-tracing approach suitable for most optical surfaces, including freeform surfaces. The established freeform design method simultaneously calculates multi-surface coefficients with merely the system geometry known. In addition, we provide a ‘double-pass surface’ strategy with the desired overlap (not mutually centered) that enables a component reduction for very compact yet high-performing designs. Two different examples are used to demonstrate the effectiveness of the proposed method. This work provides a robust design scheme for reflective freeform imaging systems in general, and it unlocks a series of new ‘double-pass surface’ designs for very compact, high-performing freeform imaging systems.

Conference Presentation

Citation Download Citation

Yunfeng Nie, David R. Shafer, Heidi Ottevaere, Hugo Thienpont, and Fabian Duerr "Freeform imaging system design with multiple reflection surfaces", Proc. SPIE 11895, Optical Design and Testing XI, 118950F (9 October 2021); https://doi.org/10.1117/12.2601240

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