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Updated: Feb 6, 2026

Continuous-Wave Propagation Channel-Sounding Measurement System - Testing, Verification, and Measurements
Published on: June 25, 2021
Micron-precision measurement using a combined frequency-modulated continuous wave ladar autofocusing system at 60
Abstract:
In this paper, we propose a novel combined frequency-modulated continuous wave (FMCW) ladar autofocusing system and a fast compensation method for dispersion mismatch, which could allow high-precision ranging to be performed at a long distance. By using the dual-beam laser autofocusing system based on a liquid lens, this system can quickly complete a measurement with high-precision. The experimental results showed that the precision was below 126 μm in a range up to 60m, corresponding to a relative precision of 2.1 × 10 -6, compared to a reference interferometer.
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