Work

Lensless single-shot dual-wavelength digital holography with sub-pixel resolution and centimeter depth range

Year: 2025

Type: article

Abstract: Lensless single-shot dual-wavelength digital holography is resolution limited by the pixel-size of the camera and often has an insufficient depth range. We present a novel dual-wavelength holographic configuration with expanding wavefront illumination that breaks the pixel-limited resolution barrier and achieves diffraction-limited spatial resolution. By implementing expanding wavefront illumination with dual-wavelength digital holography based on a wavelength-tunable laser, we achieve a high-resolution centimeter-scale depth range. A quantitative precision analysis demonstrates that single-shot acquisition reaches the shot-noise-limited depth detection. The proposed holographic scheme provides a robust 3D optical inspection solution for high-throughput, micro-scale resolution industrial inline metrology.

Source: APL Photonics

DOI: 10.1063/5.0280018

Authors: Huangcheng Shangguan, H. Paul Urbach, Jeroen Kalkman

Institution: Delft University of Technology

Language: English

Topic: Digital Holography and Microscopy

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,750

Funder: Nederlandse Organisatie voor Wetenschappelijk Onderzoek