Laser rangefinders

Forrester, Paul; Hulme, Kevin F.

doi:10.1007/bf00619793

Cited by 39 publications

(12 citation statements)

References 25 publications

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“…In this paper we will first evaluate the effect of Gaussian profile introduced into the radiometric range function [4] in the estimation of the maximum distance between the laser imaging system and the scene to reproduce, for a given SNR (Signal-to-noise ratio), for a better measurement accuracy for all values of range distances regardless of the two cases; total reflection of the laser beam or partial reflection [5]. Second, starting from the study of the returned signal span effect on the receiving cell [6] we propose a new Gaussian reformulation of radiometric range equation based on geometric and photometric calculation of the illuminated effective area.…”

Section: D Laser Imaging Reconstruction Of Scenes Using New Photometmentioning

confidence: 99%

3D Laser Imaging Reconstruction of Scenes Using New Photometric Gaussian Beam Range Equation

Boujenab¹,

Cherkaoui²

2015

JPSA

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Abstract:In this article the problem of three-dimensional (3-D) reconstruction of scenes from terrestrial laser rangefinder data is processed, we present the simulations results of radiometric range function of the laser range finder imaging system for better optimization of maximum range detection with a given SNR (Signal-to-noise ratio). The study proposes a new reformulation of the radiometric Gaussian beam range equation on the basis of the photodetector active area. The adjustment of the optical and geometrical characteristics of the laser range finder so defined can be used to minimize the signal span to avoid the saturation of the detector cell and improve the ranging measurements (accuracy and range) for a 3D imaging application.

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Section: D Laser Imaging Reconstruction Of Scenes Using New Photometmentioning

confidence: 99%

3D Laser Imaging Reconstruction of Scenes Using New Photometric Gaussian Beam Range Equation

Boujenab¹,

Cherkaoui²

2015

JPSA

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“…The alternative part of the distribution of the intensity of the incident light in the Y direction and the signal from the array detector attached to interferometer can be written as a sum of all the spectral components ( ) where the first and the second terms is the contribution of the low and high coherency sources. Coherency of the waves are determined by parameters 1 ∆ and 2…”

Section: Number Of Pixelmentioning

confidence: 99%

“…At the same time development of equipment with continuous wave (CW) lasers makes it necessary for LWRs to be able to detect both pulsed and CW laser radiation. [1][2][3]. The importance of discriminating radiation from laser sources in laser warning systems was discussed in [3] and it was mentioned that detector selectivity is a more important criterion than detector sensitivity for this applications.…”

Section: Introductionmentioning

confidence: 99%

Compact multichannel optical Fourier spectrometer

et al. 2006

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In this work are shown the principle, first experimental results and a model design of a new type of multi channel Fourier transform (FT) spectrometer for visible (VIS) and infrared (IR) region operating in real time. The main principle of this spectrometer is that measured collected and collimated optical radiation passes through a linear array or matrix of optical Fabry-Perot interferometers. Each interferometer is placed in front of and close to each element of the array detector. By processing the signal the spectrum of the optical radiation can be extracted. This design does not require intermediate optics between interferometer and array detector and allows for a reliable and extremely compact construction. Production cost can be low when a simple wedge type interferometer is integrated with existing array or matrix detectors, e.g. CCD camera. One other benefit is that the shape of the interferometer determines whether the spectrometer is suitable for measuring wide spectra radiation or has the ability to discriminate optical coherent radiation. Experimental results achieved for VIS and NIR range of spectra are promising. The principals of this design can be used for a variety of applications besides as a spectrometer. For example warning systems for lasers and restricted coherency sources and also filtering of optical signals and for measuring the spectral content working in a wide spectral range.

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“…Laser range finding is a well-established technology applied in a number of ground-based instruments [1][2][3][4]. The requirements for a space-borne laser altimeter are driven by firm constraints on available power and mass resources, environmental conditions on board the spacecraft, by the aim for very high reliability, and in particular by tight link budgets for ranging over large distances.…”

Section: Introductionmentioning

confidence: 99%

Space-qualified laser system for the BepiColombo Laser Altimeter

et al. 2013

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The space-qualified design of a miniaturized laser for pulsed operation at a wavelength of 1064 nm and at repetition rates up to 10 Hz is presented. This laser consists of a pair of diode-laser pumped, actively q-switched Nd:YAG rod oscillators hermetically sealed and encapsulated in an environment of dry synthetic air. The system delivers at least 300 million laser pulses with 50 mJ energy and 5 ns pulse width (FWHM). It will be launched in 2017 aboard European Space Agency's Mercury Planetary Orbiter as part of the BepiColombo Laser Altimeter, which, after a 6-years cruise, will start recording topographic data from orbital altitudes between 400 and 1500 km above Mercury's surface.

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Laser rangefinders

Cited by 39 publications

References 25 publications

3D Laser Imaging Reconstruction of Scenes Using New Photometric Gaussian Beam Range Equation

3D Laser Imaging Reconstruction of Scenes Using New Photometric Gaussian Beam Range Equation

Compact multichannel optical Fourier spectrometer

Space-qualified laser system for the BepiColombo Laser Altimeter

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