Single-exposure Fourier-transform ghost imaging based on spatial correlation

Tan, Zhijie; Ye, Hong; Zhu, Rihong; Lu, Rengui; Han, Shensheng; Xue, Chunlai; Yang, Shumin; Wu, Yanqing

doi:10.1103/physreva.106.053521

Cited by 6 publications

(4 citation statements)

References 52 publications

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“…where h•i s means the spatial average [38] and represents the complex conjugate. Assuming that the modulators will introduce field fluctuations that can be described by a complex circular Gaussian ergodic random process with zero mean [41] , then we have…”

Section: Theorymentioning

confidence: 99%

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Angle measurement of pulsars based on spatially modulated X-ray intensity correlation

Wang,

Yu,

Tan

et al. 2024

中国光学快报

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High-precision angle measurement of pulsars is critical for realizing pulsar navigation. Compared to visible light and radio waves, the wavelength of X-rays is incredibly short, which provides the possibility of achieving better spatial resolution. However, due to the lack of applicable X-ray apparatus, extracting the angle information of pulsars through conventional X-ray methods is challenging. Here, we propose an approach of pulsar angle measurement based on spatially modulated X-ray intensity correlation (SMXIC), in which the angle information is obtained by measuring the spatial intensity correlation between two radiation fields. The theoretical model for this method has been established, and a proof-of-concept experiment was carried out. The SMXIC measurement of observing angles has been demonstrated, and the experimental results are consistent with the theoretical values. The potential of this method in future applications is discussed, and theoretically, the angular measurement at the level of micro-arcsecond can be expected. The sphere of pulsar navigation may benefit from our fresh insights.

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Section: Theorymentioning

confidence: 99%

“…[24][25][26][27][28][29][30][31] . Now it has been expanded to the X-ray region [32][33][34][35][36][37][38] , and some progress in pulsar observation has been achieved [39,40] . Nevertheless, these X-ray techniques require a detecting time that is shorter than the coherence time of the radiation field.…”

Section: Introductionmentioning

confidence: 99%

Angle measurement of pulsars based on spatially modulated X-ray intensity correlation

Wang,

Yu,

Tan

et al. 2024

中国光学快报

Self Cite

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“…These patterns are used to form a reconstructed image through correlation calculation. Owing to its wide range of light sources and strong anti-interference ability, GI has attracted significant attention in several related fields such as X-ray imaging 1 , 2 , terahertz imaging 3 , acoustic imaging 4 , three-dimensional imaging 5 , 6 , fluorescence imaging 1 , optical encryption 7 , 8 , and underwater imaging 9 – 15 . The application scenarios and influencing factors of GI are depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

A ghost imaging framework based on laser mode speckle pattern for underwater environments

Yang,

Wang,

et al. 2024

Commun Eng

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Due to the complex physical processes found in underwater environments, such as absorption, scattering, and noise, it is challenging to obtain high-quality images using conventional camera-based imaging techniques. Ghost imaging possesses strong anti-interference capabilities and can effectively obtain images in underwater environments. Here, we propose a ghost imaging framework based on a physical model of M2-ordered laser mode patterns and apply it to Ghost Imaging. The simulation results show that the Laser Mode Speckle Ghost Imaging can reconstruct the overall trapped contour even at a low sampling rate, specifically below 0.64%. A high-quality image with a Peak Signal-to-Noise Ratio of 19 dB can be achieved using the Laser Mode Speckle Ghost Imaging when the sampling rate is 5%. Even with a relative random noise of 1.0%–5.0%, the imaging quality of Laser Mode Speckle Ghost Imaging is superior to that of Random speckle pattern Ghost Imaging, Walsh speckle pattern Ghost Imaging, and Haar speckle pattern Ghost Imaging when the sampling rate consistent. Our experimental results in a turbid water environment confirm the conclusions drawn from the simulation results. The proposed Laser Mode Speckle Ghost Imaging can be used as an imaging solution in challenging liquid environments, such as turbid liquids, inclement weather, and biological tissue fluids.

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“…The comparison of the imaging qualities of orthogonal and random speckle patterns in air 13 has shown that orthogonal speckle patterns are more suitable for low-sampling CGI. Owing to its wide range of light sources and strong antiinterference ability, GI has attracted significant attention in several related fields such as X-ray imaging 14,15 , terahertz imaging 16 , acoustic imaging 17 , three-dimensional imaging 18,19 , fluorescence imaging 14 , optical encryption 20,21 , and underwater imaging [22][23][24][25][26][27] . Application scenarios and influencing factors of GI are shown in Fig.…”

mentioning

confidence: 99%

Laser mode speckle ghost imaging of underwater environments

Feng

Yang²,

Wu³

et al. 2023

Preprint

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Absorption, scattering, noise, and low-sensitivity detector lead to poor quality in conventional underwater imaging. In response, Ghost imaging (GI) has emerged as an effective anti-interference underwater imaging method based on the relationship between illumination speckle patterns and a non-spatial-resolution detector. Conventional speckle patterns are distributed based on mathematical models such as the random, Hadamard, or Walsh models. In this study, we apply novel speckle patterns based on a physical model of M2 ordered laser modes to GI. The laser mode speckle pattern GI (LMS-GI) system achieves perfect imaging quality at a sampling rate of 5% or less; good imaging quality persists even below 0.64%. Despite relative random noise of 1.0%~ 5.0%, it outperforms the other GIs. Furthermore, at a low sampling rate of 2.48%, LMS-GI is effective not only in inclement weather, but also in complex liquid environments such as turbid liquids and biological tissue fluids.

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Single-exposure Fourier-transform ghost imaging based on spatial correlation

Cited by 6 publications

References 52 publications

Angle measurement of pulsars based on spatially modulated X-ray intensity correlation

Angle measurement of pulsars based on spatially modulated X-ray intensity correlation

A ghost imaging framework based on laser mode speckle pattern for underwater environments

Laser mode speckle ghost imaging of underwater environments

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