14 April 1999 AMCW laser rangefinder for machine vision using two modulation frequencies for wide measurement range and high resolution
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Abstract
Short-range laser rangefinders are the object of intense research effort due to their wide range of applications in tasks such as machine vision, automated inspection and 3D range map acquisition. For ranges of up to a few meters, Amplitude Modulation Continuous Wave (AMCW) systems using modulation frequencies in the range of several MHz, have obtained very interesting results. However, these systems presents a trade-off between maximum range and minimum measurement resolution, which is indeed a problem. In this work we present the conception and first experimental results of an AMCW system that employs two different modulation frequencies to overcome this problem and achieve both wide measurement range and good resolution.
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Sara Perez, Sara Perez, E. Garcia, E. Garcia, Horacio Lamela, Horacio Lamela, } "AMCW laser rangefinder for machine vision using two modulation frequencies for wide measurement range and high resolution", Proc. SPIE 3626, Testing, Packaging, Reliability, and Applications of Semiconductor Lasers IV, (14 April 1999); doi: 10.1117/12.345414; https://doi.org/10.1117/12.345414
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