Improving the Contrast of Pseudothermal Ghost Images Based on the Measured Signal Distribution of Speckle Fields
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Abbe Center of Photonics, Institute of Optics and Quantum Electronics, Friedrich Schiller University, Max Wien Platz 1, 07743 Jena, Germany
2
Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Bernhard Wilhelm Roth
Appl. Sci. 2021, 11(6), 2621; https://doi.org/10.3390/app11062621
Received: 25 February 2021
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Revised: 8 March 2021
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Accepted: 11 March 2021
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Published: 16 March 2021
(This article belongs to the Special Issue Modern Applications in Optics and Photonics: From Micro- and Nanooptics to Optical Sensing, Measurement and Communication)
In this study, we examine the quality of microscale ghost images as a function of the measured histographic signal distribution of the speckle fields from a nonuniform pseudothermal light source. This research shows that the distribution of the detected signal level on each pixel of the camera plays a significant role in improving the contrast-to-noise ratio (CNR) of pseudothermal ghost imaging. To our knowledge, the scaling of CNR with different pixel intensity distributions of the speckle fields is observed for the first time in the field of pseudothermal microscale ghost imaging. The experimental observations are in very good agreement with numerical analysis. Based on these findings, we can predict the settings for light sources that will maximize the CNR of microscale ghost images.
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MDPI and ACS Style
Sun, Z.; Tuitje, F.; Spielmann, C. Improving the Contrast of Pseudothermal Ghost Images Based on the Measured Signal Distribution of Speckle Fields. Appl. Sci. 2021, 11, 2621. https://doi.org/10.3390/app11062621
AMA Style
Sun Z, Tuitje F, Spielmann C. Improving the Contrast of Pseudothermal Ghost Images Based on the Measured Signal Distribution of Speckle Fields. Applied Sciences. 2021; 11(6):2621. https://doi.org/10.3390/app11062621
Chicago/Turabian StyleSun, Zhe, Frederik Tuitje, and Christian Spielmann. 2021. "Improving the Contrast of Pseudothermal Ghost Images Based on the Measured Signal Distribution of Speckle Fields" Applied Sciences 11, no. 6: 2621. https://doi.org/10.3390/app11062621
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