Reflective tomography: images from range-resolved laser radar measurements

Parker, J. K.; Craig, E. B.; Klick, David; Knight, F. K.; Kulkarni, Sanjeev R.; Marino, Richard M.; Senning, J. R.; Tussey, B. K.

doi:10.1364/ao.27.002642

Cited by 45 publications

(16 citation statements)

References 2 publications

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“…In recent years, with development of the laser technology, there has been an increasing interest in and need for investigation the laser radar to identify the target in civilian and aerospace fields [8][9][10][11][12][13]. So the laser high-range resolution profile (LHRRP) technologies will play an more and more important roles in target recognition and battle sense.…”

Section: Introductionmentioning

confidence: 99%

“…As compared to HRRP radar image, LHRRP is easy to offer enough and precise data on Attitude characteristic determination of target such as ground-base, spacecraft and airplane [14][15][16]. As a result, Laser high range revolution imaging Radar is a novel technology, has particularly attracted the attention of a great many institutes [8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High Resolution Range Profile Identifying Simulation of Laser Radar Based on Pulse Beam Scattering Characteristics of Targets

Wang¹,

Wu²,

Li³

et al. 2009

PIER

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Abstract-This is a presentation of an innovative technique of rigid body estimation for use with laser high-range resolution profile (LHRRP) simulations. The theory of pulse beam scattering from random rough surface is used to build a theoretical model which computes simulations for the laser pulse HRRP of the whole dimension target. As two especial cases, the LHRRP of sphere and cone are simulated in detail. We discuss and analyze some influential factors on laser radar HRRP imaging such as their dimensions, correlation length and height root mean square of the rough surface, refractive index of the material and width pulse. The simulated results suggest that the reliable identifications are possible provided in some aero and aerial recognized applications with higher resolution by laser radar.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High Resolution Range Profile Identifying Simulation of Laser Radar Based on Pulse Beam Scattering Characteristics of Targets

Wang¹,

Wu²,

Li³

et al. 2009

PIER

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“…Computed tomography imaging is the construction of a cross-section of a test object can be at any location and orientation. Such imaging can be done using different types of energy: ultrasound, alpha particles, lasers and radar [3][4][5]. Direct-detect range-resolved reflective tomography techniques can be used to obtain an image of an object that is angularly unresolved when the data are range resolved.…”

Section: Introductionmentioning

confidence: 99%

Study on the short pulselength direct-detect laser reflective tomography imaging ladar

2009

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Range-resolved reflective tomography using short pulselength lasers has been shown to be an image reconstruction method which can be used to recover image information about an object with a non-imaging laser radar (ladar) system.The resulting time-dependent return signal (Project) is collected by a non-imaging optical system, which provides a onedimensional signal as a function of range. This paper presents a short pulselength direct-detect laser reflective tomography imaging ladar, and gives the image reconstruction results. In order to efficiently improve and modify the algorithms developed for reflective tomography, we develop a new imaging reconstruction algorithm.

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“…But in radar detection, instead of transmission information, only reflection information can be gotten, so backprojection reflective tomography algorithm [14,15] is appropriate for the data processing in incoherently circular SAIL. Let f (x, y) denote the image to be reconstructed in reflective tomography and L r,φ denote the solid line r = x cos φ + y sin φ (see Fig.…”

mentioning

confidence: 99%

Experimental research of circular incoherently synthetic aperture imaging ladar using chirped-laser and heterodyne detection

Yan¹,

Sun²,

Jin³

et al. 2012

中国光学快报

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Synthetic aperture imaging ladar (SAIL) technique belongs fully coherent processing in both the time domain and space domain and has a rather high implement difficulty. To solve this problem, the concept of circular incoherently SAIL is introduced. A speckle version image of a two-dimensional (2D) letter 'E' target is reconstructed from E-field projection data detected by a circular incoherently SAIL system. The experimental system is constructed by three subsystems using chirped-pulse laser as the light source and heterodyne detection to get the range information of the target. The reconstruction of the image and the noise effect are also discussed in detail.OCIS The technique of high resolution imaging from a long distance has been pursued by researchers for many years, and many different imaging methods have been developed, in which the most promising method is the synthetic aperture imaging ladar (SAIL) technique [1] . SAIL technique integrates reflective information of the target from different angles in coherent ways and can provide the centimeter-class resolution with an aperture size no larger than a few meters on an observation range of thousand kilometers or more. But the SAIL technique belongs fully coherent processing in both the time domain and space domain, and has a rather high implement difficulty. To solve this problem, the concept of circular incoherently SAIL technique is introduced in this letter.The circular operating mode is one of the spotlightmodes in synthetic aperture radar (SAR), which is based on the relative rotation between the radar and target. It is first proposed by M. Soumekh [2,3] . After that, TszKing Chan et al. proposed a confocal algorithm for circular SAR [4−6] . Experiment of radar division of Georgia Tech Research Institute [7−9] and Technische Universitat Miinchen [10−13] has proved the feasibility of circular trajectory in signal collecting. The circular incoherently SAIL collects 360• data of projections around the target, and a two-dimensional (2D) image of the object is reconstructed by tomography algorithm from incoherent processing. Compared with other spotlight-modes, circular scanning trajectory breaks up the restriction on the extent of spatial spectrum, and as a result, high resolution image can be acquired from the circular incoherently SAIL.In this letter, we propose a circular incoherently SAIL experimental system which can get the image of the whole target region covered by the laser beam. In the experiment, a 2D target of letter "E" is placed on a plane with a tilt angle to the horizontal plane and rotated about the axis perpendicular to the tilt plane. During the experiment, the target is illuminated by a linear FM laser, and the range-dependent return signal is collected by a heterodyne detective optical system. Filtered backprojection tomography algorithm is used to reconstruct the target, and a speckle version image result which has distinct feature description of the target is obtained.For an incoherently SAIL, the range-resolved are first collect...

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Reflective tomography: images from range-resolved laser radar measurements

Cited by 45 publications

References 2 publications

High Resolution Range Profile Identifying Simulation of Laser Radar Based on Pulse Beam Scattering Characteristics of Targets

High Resolution Range Profile Identifying Simulation of Laser Radar Based on Pulse Beam Scattering Characteristics of Targets

Study on the short pulselength direct-detect laser reflective tomography imaging ladar

Experimental research of circular incoherently synthetic aperture imaging ladar using chirped-laser and heterodyne detection

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