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Passive near-field imaging with pseudo-thermal sources
Optics Letters
|March 16, 2017
Summary
Interference artifacts in passive near-field imaging are eliminated using simple random illumination. A novel pseudo-thermal source enhances imaging performance by effectively removing these spurious effects.
Area of Science:
- Optics and Photonics
- Imaging Science
Background:
- Passive near-field imaging techniques are susceptible to spurious interference effects.
- These artifacts degrade the quality and reliability of imaging results.
Purpose of the Study:
- To demonstrate a method for eliminating interference artifacts in passive near-field imaging.
- To introduce a novel pseudo-thermal source for enhanced imaging performance.
Main Methods:
- Implementation of a simple random illumination strategy.
- Utilizing a pseudo-thermal source to illuminate the sample.
- Collecting scattered fields with an aperture probe over all angles of incidence.
Main Results:
- Experimental demonstration of the elimination of spurious interference effects.
- Significant reduction in typical imaging artifacts.
- Validation of the pseudo-thermal source's effectiveness in enhancing imaging.
Conclusions:
- Random illumination effectively suppresses interference in passive near-field imaging.
- The novel pseudo-thermal source is easily implementable and boosts imaging performance.
