Single-shot incoherent three-dimensional imaging for various in-focus situations

Area of Science:

• Optics and Photonics
• 3D Imaging Technologies
• Computational Imaging

Background:

• Incoherent digital holography (IDH) enables 3D imaging with various light sources.
• Conventional IDH reconstructs transverse planes sequentially from a single hologram.

Purpose of the Study:

• To develop a novel single-shot 3D imaging technique for reconstructing specific or multiple transverse planes from one IDH.
• To enhance the efficiency and cost-effectiveness of IDH by enabling multi-plane reconstruction from a single recording.

Main Methods:

• A phase mask is used in the aperture to encode multiple object subspaces with unique focal lengths.
• Each subspace is assigned unique scattering and quadratic phases, creating distinct random dot patterns.
• Object holograms are deconvolved with corresponding dot patterns to reconstruct specific planes or combined patterns for simultaneous multi-plane reconstruction.

Main Results:

• Demonstrated reconstruction of individual transverse planes from a single-shot IDH.
• Successfully achieved simultaneous reconstruction of multiple transverse planes (N=2) separated along the Z-axis.
• Validated the technique's ability to reconstruct desired planes post-acquisition.

Conclusions:

• The novel IDH technique allows flexible, user-defined reconstruction of single or multiple transverse planes from a single hologram.
• This single-shot approach significantly improves cost-effectiveness and time efficiency in 3D imaging applications.
• The method offers a versatile solution for capturing and analyzing complex 3D scenes without repeated recordings.