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Enhanced Terahertz Phase Retrieval Imaging by Unequal Spaced Measurement
Chungui Xing1, Feng Qi2,3,4, Shuxu Guo1
1State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
Sensors (Basel, Switzerland)
|May 28, 2022
Summary
This study introduces a new terahertz imaging method using unequal spaced measurements. This approach speeds up phase retrieval for faster, higher-quality non-destructive inspection.
Area of Science:
- Optics and Photonics
- Imaging Science
- Materials Science
Background:
- Terahertz (THz) lensless phase retrieval imaging is valuable for non-destructive inspection.
- Conventional methods with equal interval measurements suffer from slow convergence and stagnation.
Purpose of the Study:
- To develop a faster and more efficient phase retrieval method for THz imaging.
- To improve image quality and computational efficiency in non-destructive inspection.
Main Methods:
- Proposed a nonlinear unequal spaced measurement scheme for phase retrieval.
- Utilized gradually increasing interval spaces between measurement planes.
- Increased intensity diversity with fewer required images.
Main Results:
- Achieved quantitative phase and amplitude imaging.
- Demonstrated faster imaging speed compared to conventional methods.
- Showcased improved image quality and robustness to noise.
Conclusions:
- The nonlinear unequal spaced measurement scheme significantly enhances THz imaging performance.
- This method offers a computationally efficient and robust solution for non-destructive inspection applications.
