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High-speed coherent diffraction imaging by varying curvature of illumination with a focus tunable lens
- Source :
- Optics Express. 28:25655
- Publication Year :
- 2020
- Publisher :
- Optica Publishing Group, 2020.
-
Abstract
- A high-speed coherent diffraction imaging method is proposed by varying the curvature of illumination with a focus tunable lens. The imaging setup is free of conventional mechanical translation and takes only milliseconds to refocus by changing the electric signal applied on the lens. It is more compact and also an inexpensive alternative to coherent diffraction imaging with computerized translational stages. A detector that is kept at a fixed distance from the sample records diffraction patterns each time the spherical wavefront illuminations on the sample is changed with a control current. The complex wavefront of the object is then quantitatively recovered from the diffraction intensity measurements using an iterative phase retrieval algorithm. The feasibility of the proposed method is experimentally verified using various samples. Extremely short response time of the focus tunable lens makes the proposed method highly suitable for applications that requires high speed imaging.
- Subjects :
- Diffraction
Wavefront
Materials science
business.industry
Detector
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
Physics::Optics
02 engineering and technology
021001 nanoscience & nanotechnology
Curvature
01 natural sciences
Coherent diffraction imaging
Atomic and Molecular Physics, and Optics
law.invention
010309 optics
Lens (optics)
Optics
law
0103 physical sciences
0210 nano-technology
business
Focus (optics)
Phase retrieval
ComputingMethodologies_COMPUTERGRAPHICS
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....a848e931519a800184403243896cbd76