Work

Dome-APIC illumination design for high space-bandwidth product analytic imaging

Year: 2025

Type: article

Abstract: Breaking the tradeoff between resolution and field-of-view, while obtaining distortion-free images, can be achieved through computational imaging techniques. A recent approach, Angular Ptychographic Imaging with Close-form method (APIC), has showcased its capability to analytically recover both intricate aberrations and high space-bandwidth product complex optical fields with NA-matching and darkfield illuminations. However, its flat illumination setup limits its ability to efficiently reconstruct a large field-of-view simultaneously with high resolution, owing to the curvature in the wavefront from NA-matching illuminations and the finite beam angle of the Lambertian LED light source. Here, we introduce an illumination framework tailored for APIC consisting of a distant annular LED ring and an LED dome that enables the reconstruction of a larger area with an extended synthetic numerical aperture, consequently enhancing resolution. For a single set of measurements, our new prototype, termed Dome-APIC can reach 620nm resolution with a 10×/0.25 NA objective lens over a field-of-view of 450 µ m x 450 µ m.

Source: Biomedical Optics Express

DOI: 10.1364/boe.555541

Authors: Siyu (Steven) Lin, Haowen Zhou, Ruizhi Cao, Shi Zhao, Oumeng Zhang, Changhuei Yang

Institution: California Institute of Technology

Language: English

Topic: Advanced X-ray Imaging Techniques

Subfield: Radiation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,913

Funder: California Institute of Technology