Hybrid achromatic microlenses with high numerical apertures and focusing efficiencies across the visible

Corey A. Richards, Christian R. Ocier, Dajie Xie, Haibo Gao, Taylor Robertson, Lynford L. Goddard, Rasmus E. Christiansen, David G. Cahill and Paul V. Braun ()
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Corey A. Richards: University of Illinois Urbana-Champaign
Christian R. Ocier: University of Illinois Urbana-Champaign
Dajie Xie: University of Illinois Urbana-Champaign
Haibo Gao: University of Illinois Urbana-Champaign
Taylor Robertson: Ansys Inc
Lynford L. Goddard: University of Illinois Urbana-Champaign
Rasmus E. Christiansen: Technical University of Denmark
David G. Cahill: University of Illinois Urbana-Champaign
Paul V. Braun: University of Illinois Urbana-Champaign

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Compact visible wavelength achromats are essential for miniaturized and lightweight optics. However, fabrication of such achromats has proved to be exceptionally challenging. Here, using subsurface 3D printing inside mesoporous hosts we densely integrate aligned refractive and diffractive elements, forming thin high performance hybrid achromatic imaging micro-optics. Focusing efficiencies of 51–70% are achieved for 15μm thick, 90μm diameter, 0.3 numerical aperture microlenses. Chromatic focal length errors of less than 3% allow these microlenses to form high-quality images under broadband illumination (400–700 nm). Numerical apertures upwards of 0.47 are also achieved at the cost of some focusing efficiency, demonstrating the flexibility of this approach. Furthermore, larger area images are reconstructed from an array of hybrid achromatic microlenses, laying the groundwork for achromatic light-field imagers and displays. The presented approach precisely combines optical components within 3D space to achieve thin lens systems with high focusing efficiencies, high numerical apertures, and low chromatic focusing errors, providing a pathway towards achromatic micro-optical systems.

Date: 2023
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DOI: 10.1038/s41467-023-38858-y

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