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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
Published on: April 1, 2020
Adaptive angle-calibration for wide field-of-view on-chip phase imaging with LED array
Sibi Chakravarthy Shanmugavel1, Shwetadwip Chowdhury1
1Department of Electrical and Computer Engineering, University of Texas at Austin.
Biomedical Optics (Washington, D.C.)
|June 18, 2026
Summary
This study presents an adaptive angle-calibration framework for mask-less on-chip phase imaging. It enables wide field-of-view phase imaging by correcting for varying illumination angles from LED arrays.
Area of Science:
- Optics and Photonics
- Biomedical Imaging
- Microscopy
Background:
- Phase imaging is crucial for visualizing transparent specimens.
- Traditional phase imaging methods often require complex setups or specialized components.
- On-chip imaging offers miniaturization and integration benefits.
Purpose of the Study:
- To develop an adaptive angle-calibration framework for mask-less on-chip phase imaging.
- To enable wide field-of-view (FOV) phase imaging using an LED array.
- To address challenges posed by spatially-varying illumination angles in on-chip systems.
Main Methods:
- Utilized an LED array for delivering angled illuminations.
- Developed an adaptive angle-calibration algorithm.
- Implemented the framework for mask-less on-chip phase imaging.
Main Results:
- Successfully demonstrated wide field-of-view phase imaging.
- The adaptive framework accurately accounted for spatially-varying illumination angles.
- Achieved high-quality phase contrast imaging without physical masks.
Conclusions:
- The proposed framework enhances the capabilities of on-chip phase imaging.
- It offers a practical solution for achieving wide FOV phase imaging.
- This technology has potential applications in various fields requiring high-resolution imaging.
