From freeform to metaform: design, fabrication, and testing

Daniel Nikolov

doi:10.1117/12.2613107

1 November 2021 From freeform to metaform: design, fabrication, and testing

Daniel Nikolov

Proceedings Volume 11889, Optifab 2021; 1188903 (2021) https://doi.org/10.1117/12.2613107
Event: SPIE Optifab, 2021, Rochester, New York, United States

Abstract

Freeform optics and metasurfaces are two emerging optical technologies that show promise for addressing the needs of modern consumer devices like augmented and virtual reality (AR/VR) displays and mobile cameras. Recent advances in fabrication and testing have been critical to the success of freeform optics. In parallel, various methods for metasurface fabrication, including electron-beam lithography (EBL), have been researched and well established in the last decade but have been limited to fabrication on flat substrates. Metaform is a new optical component that consists of a metasurface conformed to a freeform substrate. We will explore the advances in nodal aberration theory, freeform design methodology, nanofabrication, and metrology necessary to make metaform optics a reality. To validate the developed processes and highlight the advantages of metaforms, we will examine a compact metaform imager inspired by the needs of AR displays. By leveraging the benefits of both metasurfaces and freeform optics, metaforms can thus be used to navigate critical design tradeoffs between optical performance, system volume, and form factor.

Conference Presentation

Citation Download Citation

Daniel Nikolov "From freeform to metaform: design, fabrication, and testing ", Proc. SPIE 11889, Optifab 2021, 1188903 (1 November 2021); https://doi.org/10.1117/12.2613107

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