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Multiwavelength-multiplexed phase-shifting incoherent color digital holography
Optics Express
|April 1, 2020
Summary
We developed a new digital holography technique using incoherent light to capture multiple wavelengths simultaneously. This method simplifies hologram recording and analysis for both transparent and reflective objects.
Area of Science:
- Optics and Photonics
- Digital Holography
- Interferometry
Background:
- Traditional digital holography often requires coherent light sources and wavelength-specific filters.
- Simultaneous multiwavelength recording can improve imaging capabilities but presents technical challenges.
Purpose of the Study:
- To introduce a novel multiwavelength-multiplexed phase-shifting incoherent color digital holography technique.
- To enable simultaneous capture and selective extraction of object waves at multiple wavelengths without filters.
Main Methods:
- Utilizing a monochrome image sensor to record wavelength-multiplexed, phase-shifted, incoherent holograms.
- Applying phase-shifting interferometry to selectively extract object waves across different wavelengths.
- Illuminating objects with spatially incoherent light containing multiple wavelengths.
Main Results:
- Successfully demonstrated the technique for both transparent and reflective objects.
- Achieved simultaneous acquisition of multiwavelength-incoherent object waves.
- Validated the selective extraction of object waves using phase-shifting interferometry.
Conclusions:
- The proposed technique offers a simplified and effective approach for multiwavelength digital holography.
- This method eliminates the need for wavelength filters, streamlining the holographic process.
- It holds potential for advanced imaging applications in various scientific fields.
