2D Imaging Experiment of a 2D Target in a Laboratory-Scale Synthetic Aperture Imaging Ladar

Yu, 周煜 Zhou; Nan, 许楠 Xu; Zhu, 栾竹 Luan; Aimin, 闫爱民 Yan; Lijuan, 王利娟 Wang; Jianfeng, 孙剑锋 Sun; Liren, 刘立人 Liu

doi:10.3788/aos20092907.2030

Cited by 15 publications

(4 citation statements)

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“…However, speckle effect not only decreases the SNR in heterodyne detection but also reduces imaging quality. A variety of SAIL 2D reconstructed images reported by several institutes are degraded by laser speckle effect [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of space–time speckle effect on the image quality in a synthetic aperture imaging ladar

Zhou

Sun

et al. 2014

Optics Communications

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Section: Introductionmentioning

confidence: 99%

Influence of space–time speckle effect on the image quality in a synthetic aperture imaging ladar

Zhou

Sun

et al. 2014

Optics Communications

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“…In addition, SAIL is an active sensing method, therefore, it is not restricted to daylight operation. Typically implementation of SAIL employs photon-limited phase-sensitive heterodyne detection for data collection and synthetic-aperture imaging by use of quadratic phase history reconstruction in the azimuth direction and oblique ranging with frequency sweeping or shot pulsing in the range direction for two-dimensional (2D) imaging [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Optical image processing for synthetic-aperture imaging ladar based on two-dimensional Fourier transform

et al. 2014

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A two-dimensional (2D) Fourier transform algorithm for the image reconstruction of synthetic-aperture imaging ladar (SAIL) collected data is suggested. This algorithm consists of quadratic phase compensation in azimuth direction and 2D fast Fourier transform. Based on this algorithm and the parallel 2D Fourier transform capability of spherical lens, an optical principle scheme that processes the SAIL data is proposed. The basic principle, design equations, and necessary analysis are presented. To verify this principle scheme, an experimental optical SAIL processor setup is constructed. The imaging results of SAIL data obtained by our SAIL demonstrator are presented. The optical processor is compact, lightweight, and consumes low power. This optical processor can also provide inherent parallel and speed-of-light computing capability, and thus has potential applications in on-board and satellite-borne SAIL systems.

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“…A synthetic aperture imaging ladar (SAIL) can provide fine resolution, two-dimensional (2D) active imaging at a long range with small-diameter optics. It recently became an interesting field of research, and two kinds of SAILs, the side-looking SAIL and the down-looking SAIL, have been reported [1][2][3][4][5][6][7][8][9][10] . The side-looking SAIL has the disadvantages of a narrow footprint, serious phase interferences from atmospheric turbulence, and mechanical trembling.…”

mentioning

confidence: 99%

Laboratory demonstration of static-mode down-looking synthetic aperture imaging ladar

Zhang¹,

Lü²,

Sun³

et al. 2015

中国光学快报

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A static-mode synthetic aperture imaging ladar (SAIL) in which the target and carrying platform are kept still during the collection process is proposed and demonstrated. A target point of 0.5 mm × 0.5 mm and a two-dimensional (2D) object are reconstructed in the experiments, in which an optical collimator with a focal length of 10 m is used to simulate the far-field condition. The achieved imaging resolution is in agreement with the theoretical design. The static-mode down-looking SAIL has the capability to eliminate the influence from the atmospheric turbulence and can be conveniently operated outdoors.

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2D Imaging Experiment of a 2D Target in a Laboratory-Scale Synthetic Aperture Imaging Ladar

Cited by 15 publications

References 0 publications

Influence of space–time speckle effect on the image quality in a synthetic aperture imaging ladar

Influence of space–time speckle effect on the image quality in a synthetic aperture imaging ladar

Optical image processing for synthetic-aperture imaging ladar based on two-dimensional Fourier transform

Laboratory demonstration of static-mode down-looking synthetic aperture imaging ladar

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