Chongfan Technology
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16
2026
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03
High-Fidelity Full-Color Self-Interfering Incoherent Digital Holography Based on Quarter-Wave Geometric Phase Optics
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The team led by Hak-Rin Kim at Kyungpook National University has proposed a compact self‑interfering incoherent digital holography (SIDH) system that employs geometric phase (GP) lenses based on quarter‑wave plates (QWPs), enabling high‑fidelity full‑color holographic imaging under broadband incoherent illumination. Traditional SIDH systems utilize GP lenses based on half‑wave plates (HWPs), which, due to chromatic dispersion in phase retardation, inevitably give rise to three‑wavefront polarization interference. This interference introduces color‑dependent artifacts into the reconstructed image. In contrast, the QWP‑based design fundamentally suppresses such interference by using non‑diffractive beams as reference beams, thereby achieving stable dual‑wavefront modulation. The phase‑encoded polarization interference patterns generated by this method maintain spectral consistency across the red, green, and blue (RGB) channels. Experimental results demonstrate that this approach significantly reduces noise and markedly enhances the fidelity of full‑color images, a finding corroborated by channel‑specific noise analysis and structural similarity metrics. The system also retains a simplified optical configuration, eliminating the need for active polarization control, thus enabling compact integration and cost‑effective fabrication. These advantages make the proposed QWP–GP SIDH architecture an ideal solution for portable, real‑time digital holographic 3D imaging, while also offering scalable potential for applications such as augmented reality, optical diagnostics, and spectroscopic holography.
The research findings were published on January 25, 2026, in Opto-Electronic Advances under the title “High-fidelity full-color self-interference incoherent digital holography via quarter-wave geometric phase optics.”
Figure 1: Schematic Diagram of a SIDH System Based on a Quarter-Wave Plate (QWP) GP Lens
Figure 2: A Comparative Diagram of Online Wavefront Separation in the GP-SIDH System Based on Half-Wave Plate (HWP) and Quarter-Wave Plate (QWP) Configurations
Figure 3: Simulated polarization characteristics of the interference between left-handed circularly polarized light and right-handed circularly polarized light.
Figure 4: Simulated holographic image reconstruction for the GP-SIDH system based on HWP and QWP under a point-source illumination.
Figure 5: Experimental characterization of the GP-SIDH system using a GP lens based on a half-wave plate (HWP) and a quarter-wave plate (QWP), along with full-color holographic reconstruction results.
Figure 6: The structural similarity index (SSIM) map compares the full-color holographic reconstruction image with the digital single-lens reflex camera reference image.
Figure 7: Depth-Resolved Full-Color Holographic Reconstruction in a QWP-Based GP-SIDH System
Source: Optics World
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