Freeform imaging system design with multiple reflection surfaces

Research output: Chapter in Book/Report/Conference proceedingConference paper

1 Citation (Scopus)


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.
Original languageEnglish
Title of host publicationSPIE/COS Photonics Asia
Subtitle of host publicationOptical Design and Testing XI
EditorsYongtian Wang, Tina E. Kidger, Osamu Matoba, Rengmao Wu
Number of pages14
ISBN (Electronic)9781510646391
ISBN (Print)978-1-5106-4639-1
Publication statusPublished - 9 Oct 2021
EventSPIE/COS Photonics Asia 2021 - Nantong International Conference Center, Nantong, China
Duration: 10 Oct 202013 Oct 2021

Publication series

NameProceedings of SPIE


ConferenceSPIE/COS Photonics Asia 2021


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