Experimental demonstration of parallel two-step phase-shifting digital holography

Area of Science:

• Optics and Photonics
• Digital Holography
• Interferometry

Background:

• Phase-shifting interferometry typically requires multiple acquisitions.
• Digital holography enables wavefront reconstruction from recorded holograms.
• Single-shot techniques are desirable for dynamic or fast phenomena.

Purpose of the Study:

• To develop and experimentally demonstrate a parallel two-step phase-shifting digital holography system.
• To achieve single-shot phase-shifting interferometry for holographic imaging.
• To showcase the system's capability for three-dimensional imaging and artifact removal.

Main Methods:

• Construction of a novel system utilizing parallel two-step phase-shifting digital holography.
• Employment of a custom image sensor with a 2x1 array of pixel-aligned micro-polarizers.
• Experimental validation of the single-shot holographic reconstruction process.

Main Results:

• Successful experimental demonstration of the parallel two-step phase-shifting digital holography technique.
• Effective removal of unwanted images, including zero-order diffraction and conjugate images.
• Demonstration of single-shot capability and successful three-dimensional imaging of objects.

Conclusions:

• The developed system provides a viable method for single-shot phase-shifting digital holography.
• The technique successfully reconstructs object images while suppressing artifacts.
• This advancement offers potential for improved 3D imaging in various applications.