2023/06/21 by Mohit Rathor, Rathor, Mohit, Shivam Kumar Chaubey +5
Computer Science · Engineering · Physics and Astronomy · #Digital Holography and Microscopy #FOS: Physical sciences #Near-Field Optical Microscopy #Optical measurement and interference techniques #Optics (physics.optics)
paper · doi:10.48550/arxiv.2306.12046
openalex publication_date 2023/06/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present a digital holographic microscope (DHM) for speckle-free quantitative imaging and depth sectioning. The proposed DHM employs an incoherent light source in an in-line Fizeau interferometer configuration with a tunable longitudinal separation between the interfering beams. This configuration enables recording fringes within the source's longitudinal coherence length, facilitating depth-sectioning capability and quantitative imaging. A polarization-phase shifting approach retrieves a quantitative speckle-free phase image from experimentally recorded interferograms. Experimental validation using smooth and rough objects demonstrates the system's performance, further supported by the perception-based image quality evaluator. The proposed DHM shows promising applications in pathological, material science, and metrology.