Experimental full-field Fresnel incoherent correlation holography using a digital micromirror device

Area of Science:

• Optics and Photonics
• 3D Imaging Technologies
• Holography

Background:

• Fresnel incoherent correlation holography (FINCH) is a key technique for 3D imaging under incoherent light.
• Traditional FINCH systems rely on liquid crystal spatial light modulators (LC-SLMs).
• LC-SLMs offer phase modulation but can be expensive and slow.

Purpose of the Study:

• To demonstrate the first full-field FINCH implementation using a digital micromirror device (DMD).
• To overcome challenges associated with DMD's binary amplitude modulation for FINCH.
• To establish DMDs as a viable, cost-effective alternative for FINCH systems.

Main Methods:

• Developed a FINCH system utilizing a DMD for wavefront modulation.
• Employed a Lee hologram-based encoding scheme with Fourier-domain spatial filtering.
• Integrated optical design, mask generation, and numerical reconstruction for a complete system.

Main Results:

• Successfully implemented full-field FINCH using a DMD.
• Demonstrated 3D imaging of single-point and multi-point objects at various depths.
• Validated the system's performance under pseudo-incoherent illumination.

Conclusions:

• DMDs are a feasible and economical substitute for LC-SLMs in FINCH.
• The developed DMD-FINCH system enables high-speed, accessible, and programmable 3D holographic imaging.
• This advancement broadens the applicability of FINCH for 3D imaging.