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- W2039999870 abstract "The optimization and performance assessment of a reference-beam, continuous-wave, heterodyne low-power laser radar prototype 1 is presented, based on previous homodyne prototypes 2,3 . It measures both magnitude and sign of the radial component of the displacement velocity. The basic set-up includes a low power (∼3 mW) commercial HeNe laser, a beam-splitter, an acousto-optic modulator, and a two-lens system that both focuses the transmitted beam on the target surface and collects the scattered light. Both the reference beam and the radiation collected are focussed onto a Si avalanche photo-detector. The self-aligned configuration of the receiver makes possible, theoretically, to perform optimal mixing between the received scattered radiation and the reference beam. The resulting electrical signal is fed to a transimpedance amplifier and displayed on a spectrum analyser. Laboratory experiments employing as a target the rim of a 50 cm-diameter rotating wheel placed at several distances have been performed. Results concerning detected signal-to-noise ratio, detected-signal spectral width, accuracy of the radial component of the velocity under measurement and system working range will be presented and discussed." @default.
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- W2039999870 date "2004-01-09" @default.
- W2039999870 modified "2023-10-16" @default.
- W2039999870 title "Optimization and performance assessment of a self-aligned heterodyne laser radar system for surface displacement monitoring" @default.
- W2039999870 doi "https://doi.org/10.1117/12.510694" @default.
- W2039999870 hasPublicationYear "2004" @default.
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