Research and application of amplitude‐preserved split step fourier pre‐stack depth migration method

Lv, Bing Hai; Wang, Xiwen; Yong, Xueshan

doi:10.1190/1.3603744

Cited by 2 publications

(3 citation statements)

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“…where k is the wave number and f is a non-zero constant. Then, according to the Fresnel diffraction formula [39], the complex amplitude distribution of light after free propagation over a distance z is given by:…”

Section: Institutional Review Board Statement: Not Applicablementioning

confidence: 99%

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Optical Imaging Method of Synthetic-Aperture Radar for Moving Targets

Chen,

Yang,

Wang

et al. 2024

Remote Sensing

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Traditional synthetic-aperture radar (SAR) imaging, while adept at capturing stationary scenes with clarity, often results in the blurring of moving targets due to Doppler spectrum disparities. To overcome this, this study introduces an innovative optical approach for imaging moving targets. By employing a spatial light modulator (SLM), the phase information of SAR data can be modulated onto a light beam. Then, the light propagation path is meticulously designed to take advantage of the free propagation of light to compensate for the phase differences in SAR data ,thereby achieving focal clarity. Simulations and experimental validations have demonstrated that this method surpasses traditional digital imaging techniques in terms of focusing precision. Additionally, the processing delay is only as long as the time taken for light propagation. The optical path is simple, avoiding complex assembly and alignment. This novel approach opens up new possibilities for the SAR imaging of moving targets, offering potential applications in moving target extraction, separation, and velocity estimation.

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Section: Institutional Review Board Statement: Not Applicablementioning

confidence: 99%

“…According to book [39], Fresnel diffraction can be written in the following Fourier transform form: U(x, y) = e jkz jλz e j k 2z (x 2 +y 2 ) F{U(x 0 , y 0 )e j k 2z (x0 2 +y 0 2 ) }.…”

Section: Institutional Review Board Statement: Not Applicablementioning

confidence: 99%

Optical Imaging Method of Synthetic-Aperture Radar for Moving Targets

Chen,

Yang,

Wang

et al. 2024

Remote Sensing

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“…The aperture array is to arrange the apertures of a certain shape according to a certain periodicity, that is, the transmittance function of the entire aperture plane   0 0 , t x y can be calculated with Eq. ( 1), which is expressed as a combination of the transmittance functions of a single sub-aperture   0 0 0 , t x y at N different positions by using the screening properties of  function [10]…”

Section: Diffraction Theory On Micro-lens Arraymentioning

confidence: 99%

Analysis of fill factor and diffraction influence on micro-lens array imaging system

Huang²,

Liu³

2023

Advanced Optical Manufacturing Technologies and Applications 2022; And 2nd International Forum of Young Scientists on Advanced

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Aiming at the problem of obvious diffraction when light encounters small-diameter components during transmission, we analyze the diffraction effect of micro-lens arrays in this paper. Since the fill factor of the micro-lens array determines the amount of light entering the system, which affects the diffraction effect, and ultimately affects the imaging quality together with the diffraction of the small components, we first use the scalar diffraction theory to analyze and establish the mathematical model of the fill factor of the aperture array and propose a theoretical calculation method. According to this method, different forms of aperture arrays with the same fill factor can be given through geometric relations and system parameters, and then we use an optical analysis software VirtualLab to simulate the diffraction effect. By comparing the light intensity distribution forms and exploring the diffraction effect of the aperture array form on the imaging quality, corresponding conclusions are drawn and a more advantageous structural form is selected.

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Research and application of amplitude‐preserved split step fourier pre‐stack depth migration method

Cited by 2 publications

References 0 publications

Optical Imaging Method of Synthetic-Aperture Radar for Moving Targets

Optical Imaging Method of Synthetic-Aperture Radar for Moving Targets

Analysis of fill factor and diffraction influence on micro-lens array imaging system

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