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Phase noise analysis of two wavelength coherent imaging system
Optics Express
|February 12, 2014
Summary
Two wavelength coherent imaging uses phase contrast to extract 3D target data. A new method relates phase noise to image correlation, improving target reconstruction accuracy in digital holography.
Area of Science:
- Optics and Photonics
- Digital Holography
- Image Processing
Background:
- Coherent imaging techniques are crucial for extracting detailed information from targets.
- Digital holographic techniques offer advanced capabilities over conventional methods.
- Phase noise is a significant limitation in achieving accurate target identification in coherent imaging.
Purpose of the Study:
- To introduce a novel method for quantifying phase noise in two wavelength coherent imaging.
- To establish a relationship between phase noise and image plane correlation.
- To enhance the accuracy of 3D target reconstruction in digital holography.
Main Methods:
- Utilizing a two wavelength coherent imaging setup.
- Analyzing phase contrast images at a known difference frequency.
- Correlating image planes corresponding to each wavelength to quantify phase noise.
Main Results:
- A method was developed to relate phase noise to image plane correlation.
- The study provides parameters for predicting the phase noise spectrum of a scene.
- Demonstrated the impact of phase noise on the accuracy of 3D information extraction.
Conclusions:
- The developed method aids in understanding and mitigating phase noise in two wavelength coherent imaging.
- Predicting phase noise spectra is essential for determining the fidelity of target reconstruction.
- This technique improves the reliability of 3D target information extraction using digital holography.
