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18 August 2010 Short pulselength direct-detect laser reflective tomography imaging ladar: field results
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Abstract
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. The resulting time-dependent return signal is collected by a non-imaging optical system, which provides a one-dimensional signal as a function of range. This one-dimensional signal is related to a one-dimensional slice of the spatial 3-D Fourier transform of the object. Consequently, the resolution of the object remains constant, regardless of the object's distance from the optical system. This paper presents the field results of a short pulselength direct-detect laser reflective tomography imaging ladar, and gives the image reconstruction results. The intervals of the projections are different because of the variable speed of the imaging object. In order to efficiently improve and modify the image reconstruction quality in the field experiments, we develop a new imaging reconstruction algorithm based on the feature point in the projection data to overcome the nonuniform intervals between adjacent projections. The experiment results show our algorithm is feasible and efficient.
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Jianfeng Sun, Xiaofeng Jin, Yu Zhou, and Liren Liu "Short pulselength direct-detect laser reflective tomography imaging ladar: field results", Proc. SPIE 7780, Detectors and Imaging Devices: Infrared, Focal Plane, Single Photon, 778017 (18 August 2010); https://doi.org/10.1117/12.860010
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