High-fidelity full-color self-interference incoherent digital holography via quarter-wave geometric phase optics

• • QWP-based GP lens suppresses triple-wavefront interference, reducing channel-specific noise by a factor of 2.3 compared to HWP-based SIDH, as confirmed by structural similarity index (SSIM) improvements from 0.72 to 0.91 in RGB reconstructions. • • Spectral consistency across 450–650 nm is achieved with a phase retardation deviation of less than 5%, eliminating color-dependent artifacts that previously caused >15% intensity variation in reconstructed holograms. • • The simplified optical configuration eliminates active polarization control components, reducing system cost by approximately 30% and enabling compact integration with a footprint of 10 cm × 10 cm × 5 cm. • • Real-time operation at 30 frames per second is maintained without computational overhead, supporting portable holographic 3D imaging for augmented reality and optical diagnostics.