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The interferometric phase measurement system consisting of the analog signal processing circuit and the digital phase meter achieves a phase difference resolution better than 0.1 deg. As the laser frequency is sweeping, the absolute distance can be determined by measuring the phase difference variation ...
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respectively). Two mirrors (Thorlabs, BBE02) guided the expanded light onto a digital micromirror device (DMD, Texas Instruments Lightcrafter 9000). The DMD consists of an array of micrometer-sized square mirrors
Ref [16] compared a laser sensor with a pasture ruler and a rising platemeter and obtained r2 values greater than 0.75, and Ref [17] found an r2 between 0.12–0.25 for platemeter models that were compared with hand-clipped samples in pastures of bermudagrass, alfalfa, and mixtures of both...