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Updated: May 14, 2026
10:28
Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
Published on: July 5, 2016
Extended Field of View and Resolution Enhancement in Lensless Digital Holography
Chung-Hsuan Huang1, Chih-Cheng Hsu1, Huai-Che Chu2
1Department of Electrical Engineering, Chinese Culture University, Taipei 11114, Taiwan.
Sensors (Basel, Switzerland)
|May 13, 2026
Summary
This study introduces an extended field of view (FOV) lensless digital holography method. It combines hologram stitching and multi-depth phase retrieval to overcome FOV limitations and image artifacts, enhancing imaging quality.
Area of Science:
- Optics and Photonics
- Digital Imaging
- Biomedical Engineering
Background:
- Lensless digital holography offers a low-cost, large field of view (FOV) imaging solution with quantitative phase capability.
- Current limitations include sensor size restricting FOV and twin-image artifacts in in-line reconstruction, degrading image quality.
Purpose of the Study:
- To develop an extended FOV lensless digital holography method.
- To overcome the limitations of sensor size and twin-image artifacts.
- To enhance image quality, resolution, and effective imaging area.
Main Methods:
- Proposed an extended FOV lensless digital holography technique.
- Combined hologram stitching of laterally shifted FOVs to create an extended hologram.
- Utilized multi-depth phase retrieval to suppress twin-image artifacts and improve reconstruction fidelity.
Main Results:
- Successfully expanded the imaging area beyond the sensor's native FOV.
- Enhanced effective resolution by integrating complementary diffraction information from different FOVs.
- Improved image contrast and feature visibility, demonstrating high-quality holographic imaging.
Conclusions:
- The proposed method effectively expands the imaging area while preserving the simplicity of lensless digital holography.
- Achieved resolution enhancement and improved image quality through combined techniques.
- This approach is suitable for biomedical imaging, microstructure inspection, and large area imaging applications.
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