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Digital Incoherent Compressive Holography Using a Geometric Phase Metalens.
Jonghyun Lee1, Youngrok Kim2, Kihong Choi3
1Department of Electronics and Information Engineering, College of Science and Technology, Sejong-Campus, Korea University, 2511 Sejong-ro, Sejong 30019, Korea.
Sensors (Basel, Switzerland)
|August 28, 2021
Summary
We developed a new compressive self-interference incoherent digital holography system using a metalens. This method enables efficient section-wise holographic reconstruction for visible light imaging with lower bandwidth sensors.
Area of Science:
- Optics and Photonics
- Holography
- Metasurface Technology
Background:
- Digital holography often requires high-bandwidth sensors.
- Self-interference digital holography (SIDH) simplifies optical setups.
- Metalenses offer compact and versatile optical functionalities.
Purpose of the Study:
- To propose and analyze a compressive SIDH system.
- To enable section-wise holographic reconstruction with reduced bandwidth requirements.
- To integrate a geometric phase metalens for visible light applications.
Main Methods:
- Design of a geometric phase metalens for the visible spectrum.
- Analysis of spatial distortion in the compressive SIDH system.
- Development of a compressive holographic section-wise reconstruction algorithm with spatial calibration.
- Numerical simulations to verify system operation.
Main Results:
- Demonstration of a compressive SIDH system using a metalens.
- Successful section-wise holographic object reconstruction.
- Mitigation of spatial distortion issues.
- Validation of the system's feasibility for low-bandwidth sensors.
Conclusions:
- The proposed compressive SIDH with a geometric phase metalens is a viable approach for efficient holographic reconstruction.
- This technology can significantly reduce bandwidth requirements for holographic imaging systems.
- The metalens enables a compact and effective solution for visible light holographic applications.
