2025/12/01 by Huangcheng Shangguan, H. P. Urbach, Jeroen Kalkman · 1 voice
Physics and Astronomy · #Advanced X-ray Imaging Techniques #Digital Holography and Microscopy #Random lasers and scattering media
paper · doi:10.1063/5.0280018
openalex publication_date 2025/12/01 · openalex created_date 2025/12/08 · openalex updated_date 2026/07/07
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.