Computed axial lithography: processing of nanocomposite materials and prospects for fabricating optical elements

Joseph T. Toombs; Manuel Luitz; Caitlyn C. Cook; Sophie Jenne; Chi Chung Li; Yaxuan Sun; Bastian E. Rapp; Frederik Kotz-Helmer; Hayden K. Taylor

doi:10.1117/12.2661941

17 March 2023 Computed axial lithography: processing of nanocomposite materials and prospects for fabricating optical elements

Joseph T. Toombs, Manuel Luitz, Caitlyn C. Cook, Sophie Jenne, Chi Chung Li, Yaxuan Sun, Bastian E. Rapp, Frederik Kotz-Helmer, Hayden K. Taylor

Author Affiliations +

Proceedings Volume PC12433, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XVI; PC1243309 (2023) https://doi.org/10.1117/12.2661941
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

The process of computed axial lithography (CAL) has been established as one of the fastest available photopolymer 3D printing methods, offering smooth surfaces (r.m.s. surface roughness as low as 6 nm) and the ability to process high-viscosity precursor materials (100,000 cP demonstrated). Recently we showed successful printing of microscale geometries into dispersions of silica nanoparticles in a refractive-index-matched photopolymer. After exposing the 3D geometry via patterned tomographic illumination the material is debinded and sintered. In this way, external features of 50 µm and internal channels of 150 µm diameter have been achieved. This processing technique offers a promising route to production of 3D glass microfluidic devices and complex monolithic micro-optical devices. We will describe the status of optics fabrication via CAL. We will also consider the influence of light scattering on spatial resolution and possible ways of addressing this effect.

Conference Presentation

Citation Download Citation

Joseph T. Toombs, Manuel Luitz, Caitlyn C. Cook, Sophie Jenne, Chi Chung Li, Yaxuan Sun, Bastian E. Rapp, Frederik Kotz-Helmer, and Hayden K. Taylor "Computed axial lithography: processing of nanocomposite materials and prospects for fabricating optical elements", Proc. SPIE PC12433, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XVI, PC1243309 (17 March 2023); https://doi.org/10.1117/12.2661941

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