High sampling rate single-pixel digital holography system employing a DMD and phase-encoded patterns

Area of Science:

• Optics and Photonics
• Digital Imaging
• Holographic Technology

Background:

• Traditional digital holography systems often face limitations due to the frame rates of spatial light modulators (SLMs).
• Achieving rapid recording and reconstruction of complex amplitude distributions remains a challenge in holographic imaging.
• The use of diffusers can complicate the recovery of phase and amplitude information in optical systems.

Purpose of the Study:

• To present a novel single-pixel digital holography system utilizing a digital micromirror device (DMD) as a spatial light modulator (SLM).
• To demonstrate the system's capability for rapid recording and reconstruction of complex amplitude distributions.
• To show the system's robustness in recovering phase and amplitude information even in the presence of a diffuser.

Main Methods:

• Employed a single-pixel digital holography setup with phase-encoded illumination.
• Utilized a digital micromirror device (DMD) as a high-speed spatial light modulator (SLM).
• Implemented computer-generated holograms for phase-encoded sampling, wavefront distortion compensation, and phase-shifting.
• Used a single photodiode for sequential recording of irradiance fluctuations from interference between object and reference beams.

Main Results:

• Achieved recording and reconstruction of complex amplitude distributions in seconds, significantly faster than conventional liquid crystal SLMs.
• Successfully recovered both phase and amplitude information of the object.
• Demonstrated effective phase and amplitude recovery even when a diffuser was placed in front of the photodiode.

Conclusions:

• The developed single-pixel digital holography system offers a significant speed enhancement for holographic data acquisition and reconstruction.
• The system's ability to handle wavefront distortions and operate with a diffuser broadens its potential applications.
• This approach paves the way for faster and more versatile digital holographic imaging techniques.