Millimeter wave-based patient setup verification and motion tracking during radiotherapy.
Sign Up to like & getrecommendations! Published in 2024 at "Medical physics"
DOI: 10.1002/mp.17019
Abstract: BACKGROUND Position verification and motion monitoring are critical for safe and precise radiotherapy (RT). Existing approaches to these tasks based on visible light or x-ray are suboptimal either because they cannot penetrate obstructions to the… read more here.
Keywords: absolute distance; distance; verification motion; accuracy ... See more keywords
1.79-GHz acquisition rate absolute distance measurement with lithium niobate electro-optic comb
Sign Up to like & getrecommendations! Published in 2025 at "Nature Communications"
DOI: 10.1038/s41467-025-58018-8
Abstract: AI-empowered autonomous vehicles must sense the fast-changing three-dimensional environments with high speed and precision. However, the tradeoff between acquisition rate and non-ambiguity range prevents most LiDARs from achieving high-speed absolute distance measurement. Here we demonstrate… read more here.
Keywords: distance measurement; acquisition rate; rate; absolute distance ... See more keywords
Hybrid Frequency Modulation LiDAR: Multi-Functional Measurement of Absolute Distance, Velocity, Vibration and Imaging
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2025.3560514
Abstract: Multi-functional measurement of absolute distance, velocity, vibration, and imaging with one sensor is rare but important in industrial applications. In this article, a fusion light detection and ranging (LiDAR) system based on hybrid frequency modulation… read more here.
Keywords: functional measurement; multi functional; absolute distance; vibration imaging ... See more keywords
Fringe Disappearance in Self-Mixing Interferometry Laser Sensors: Model and Application to the Absolute Distance Measurement Scheme
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2019.2901125
Abstract: The fringes disappearance phenomenon in the self-mixing interferometry occurs whenever the external round-trip phase at free-running state is modulated by either external modulation such as external cavity length changes or internal modulation when the laser… read more here.
Keywords: distance measurement; disappearance; self mixing; absolute distance ... See more keywords
Multi-heterodyne interferometric absolute distance measurements based on dual dynamic electro-optic frequency combs.
Sign Up to like & getrecommendations! Published in 2023 at "Optics express"
DOI: 10.1364/oe.487340
Abstract: In multi-heterodyne interferometry, the non-ambiguous range (NAR) and measurement accuracy are limited by the generation of synthetic wavelengths. In this paper, we propose a multi-heterodyne interferometric absolute distance measurement based on dual dynamic electro-optic frequency… read more here.
Keywords: heterodyne interferometric; frequency; multi heterodyne; interferometric absolute ... See more keywords
Absolute distance measurement by multi-heterodyne interferometry using an electro-optic triple comb.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.000807
Abstract: We experimentally demonstrate a method for absolute distance measurement using a triple-comb-based multi-heterodyne interferometer which has the capacity to simultaneously balance the non-ambiguous range, resolution, update rate, and cost. Three flat-top electro-optic combs generated via… read more here.
Keywords: multi heterodyne; distance; electro optic; absolute distance ... See more keywords