Ghost Imaging with Different Speckle Sizes of Thermal Light

Wang, Jue; Yu, Ruan; Xin, Yu; Shao, Yanming; Chen, Yanru; Zhao, Qi

doi:10.3807/josk.2016.20.1.008

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…Starting with object 1, the speckle size was increased from 36 µ m to 60 µ m in five steps, followed by reconstruction with 10,000 iterations under the same conditions. In the traditional single-size speckle pattern imaging condition, the retrieved ghost image CNRdependent speckle size was found to be in good agreement with [18][19][20][21][22][23], which indicates a growth of the CNR and a reduced resolution proportional to the speckle size in Figure 2 (black line with solid squares and black line with hollow squares). The highest CNR ghost image was obtained with the largest speckle size of 60 µ m. The best resolution was obtained with the smallest speckle size of 36 µ m.…”

Section: Resultsmentioning

confidence: 65%

“…At first, Bennink et al [4] presented an experimental demonstration of ghost imaging by using a pseudo-thermal light source. Recent studies [18][19][20][21][22] have shown that implementing a speckle-based imaging method is one of the strategies to improve the image quality in PGI. The ghost image quality, e.g., contrast-to-noise ratio (CNR) and resolution, highly depends on the characteristics of the speckle patterns.…”

Section: Introductionmentioning

confidence: 99%

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Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Tian

Sun

et al. 2023

Photonics

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In this study, the influence of hybrid speckle patterns on the contrast-to-noise ratio (CNR) and resolution in pseudo-thermal ghost imaging (PGI) was examined based on the object dimensions in the macroscopic and microscopic regimes. This research shows that an enhanced scaling of the ghost image CNR and resolution from that of the hybrid speckle pattern was observed with the increase in speckle size for a macroscopic object, compared with the use of single-size speckle patterns. For microscopic objects, the hybrid speckle pattern also offered the advantage of retrieving ghost images even if the CNR followed the same trend as the resolution. These results were verified using two different slits with the same transmitted area. In addition, the numerical analysis revealed that the interference of the hybrid speckle pattern was the major factor for a better CNR. Based on these findings, the novel hybrid speckle pattern found in this research provides a possible way for future experiments in PGI to regulate hybrid speckle patterns to obtain a better ghost image quality.

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Section: Resultsmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Tian

Sun

et al. 2023

Photonics

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Scattering medium-robust computational ghost imaging with random superimposed-speckle patterns

Lin

Cao²,

Zhou³

et al. 2023

Optics Communications

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Longitudinal spatial coherence of computational ghost imaging through atmospheric turbulence

Deng,

Ren,

Tao

et al. 2023

Phys. Scr.

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The resolution and imaging quality of ghost imaging is determined by the longitudinal spatial coherence (LSC) of speckle beams on the signal and reference arms. Based on the cross-correlation function, long-exposure and short-exposure computational ghost imaging through turbulent atmosphere is investigated analytically and numerically in the framework of the traditional imaging theory. According to the point spread function (PSF), the modulation transfer function (MTF) is derived, both of which are utilized to evaluate imaging resolution and imaging quality of computational ghost imaging (CGI), respectively. By simulating long-exposure and short-exposure ghost imaging through atmospheric turbulence, the comprehensive effects of atmospheric turbulence and beam initial parameters on the complex degree of coherence (CDC), PSF, and MTF are studied, respectively. It is found that the degradation of LSC between the two planes on the reference and signal path implies a narrower PSF and increased MTF values, which represent the better resolution and imaging quality. Thus, reducing the atmospheric turbulence strength, the speckle particle size, the wavelength and the propagation distance, and increasing the source size contribute to improving resolution and image quality of CGI because of the degradation of LSC. Furthermore, short-exposure CGI can provide imaging performance superior to long-exposure CGI in terms of resolution and imaging quality due to the decrease of LSC.

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Ghost Imaging with Different Speckle Sizes of Thermal Light

Cited by 6 publications

References 17 publications

Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Image-Enhanced Pseudo-Thermal Ghost Imaging with Hybrid Speckle Pattern

Scattering medium-robust computational ghost imaging with random superimposed-speckle patterns

Longitudinal spatial coherence of computational ghost imaging through atmospheric turbulence

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