Resolution limits in imaging LADAR systems

Khoury, Jed; Woods, Charles L.; Lorenzo, J.P.; Kierstead, John; Pyburn, Dana; Sengupta, Sandip

doi:10.1117/12.548077

Cited by 7 publications

(7 citation statements)

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“…Non-return measurements can arise from surfaces intersecting the laser beam because they have low reflectivity, 16 high orientation resulting in diffusion of the beam footprint, a small surface area such as for point targets, or volume scattering properties such as for hair and glass. 16 Sampling density can be divide into underscanned, full scanned, and overscanned 33 and are illustrated in Figure 3. The differences in sampling density refer to the distance between samples relative to the beam diameter 4 at the point of intersection with the surface.…”

Section: Complicating Factorsmentioning

confidence: 99%

Evaluating laser range scanner lateral resolution in 3D metrology

MacKinnon

Beraldin

Cournoyer

et al. 2009

Three-Dimensional Imaging Metrology

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In this study, laser range scanner lateral resolution is investigated for laser range scanners. A standardized method is proposed and demonstrated for quantifying the lateral surface resolvability of a laser range scanner through the use of an appropriately-designed artefact. A new metric for lateral surface resolution, the limit of surface resolvability, is presented and is obtained using what is referred to as the wedge test. The results of applying this metrics using this test method to laser range scanners is also presented.

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Section: Complicating Factorsmentioning

confidence: 99%

Evaluating laser range scanner lateral resolution in 3D metrology

MacKinnon

Beraldin

Cournoyer

et al. 2009

Three-Dimensional Imaging Metrology

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“…However, there has little work on studying the quality of range images obtained by the laser radar. We only find that Khoury [6] introduced the volume of resolution to describe the resolving power of Laser radar system, but it couldn't evaluate the image quality. Steinvall [7] has discussed the influence of target's shape and reflection on the range property of laser radar, but there has no discussion on the effects of system's parameters on the quality of range image.…”

Section: Introductionmentioning

confidence: 97%

Research on the effect of laser radar system parameters on the range image quality

et al. 2011

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The quality of the range image obtained by laser radar will directly influence the target profile reconstruction and the target identification, and the quality of the range image is mainly determined by the parameters of laser radar system. As a result, this paper concentrates on discussing the effect of laser radar's parameters on the quality of range image. To evaluate the quality of range image quantitatively, two parameters, the mean squared error of range (R-MSE) and peak signal noise ratio of range (R-PSNR), are introduced and a simulation program is developed to study the influence of system's parameters on the range imaging quality. The results show that for a given pulse width, there has an optimal bandwidth and threshold level, that make the range image has better image quality. Above results have important significance to optimize the parameter design of laser radar.

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“…Therefore, a number of pulses are important factors in deciding the resolution of a beam scanner [12]. If the speed of a beam scanner is increased up to 4MHz, the pulse repetition rate of a beam scanner also needs to be increased.…”

Section: Introductionmentioning

confidence: 99%

Improvement in beam scanning using optical phase array and fiber multiplexing techniques

et al. 2006

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In this paper, we theoretically and experimentally demonstrate that the major drawbacks of current beam scanning systems can be drastically reduced. First, the scanning speed of several MHz level has been achieved using an optical phased array. Since the increased scanning speed causes the lower scanning resolution due to the less number of pulses per pixel, multiplexing techniques to increase the repetition rate of a beam scanner have been demonstrated. The fiber multiplexing techniques have been demonstrated in serial and parallel configurations, which can be selected for different requirements and applications.

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Resolution limits in imaging LADAR systems

Cited by 7 publications

References 0 publications

Evaluating laser range scanner lateral resolution in 3D metrology

Evaluating laser range scanner lateral resolution in 3D metrology

Research on the effect of laser radar system parameters on the range image quality

Improvement in beam scanning using optical phase array and fiber multiplexing techniques

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