Phase-Locked Synthetic Wavelength Interferometer Using a Femtosecond Laser for Absolute Distance Measurement without Cyclic Error [PDF]
Sensors, 2023 We present a phase-locked synthetic wavelength interferometer that enables a complete elimination of cyclic errors in absolute distance measurements. With this method, the phase difference between the reference and measurement paths is fed back into a ...
Hyeokin Kang +3 more
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Improved Self-Calibration of a Multilateration System Based on Absolute Distance Measurement [PDF]
Sensors, 2020 Multilateration tracking systems (MLTSs) are used in industrial three-dimensional (3D) coordinate measuring applications. For high-precision measurement, system parameters must be calibrated properly in advance.
Quoc Khanh Nguyen +7 more
doaj +3 more sources
A Micro Absolute Distance Measurement Method Based on Dispersion Compensated Polarized Low-Coherence Interferometry [PDF]
Sensors, 2020 Micro absolute distance measurement (MADM) is widely used in industrial and military fields. To achieve high accuracy and frequency response, a polarized low-coherence interferometry (PLCI)-based method for MADM is proposed.
Xun Sun +5 more
doaj +3 more sources
1.79-GHz acquisition rate absolute distance measurement with lithium niobate electro-optic comb [PDF]
Nature CommunicationsAI-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 ...
Yifan Qi +7 more
doaj +3 more sources
Real-Time and Meter-Scale Absolute Distance Measurement by Frequency-Comb-Referenced Multi-Wavelength Interferometry [PDF]
Sensors, 2018 We report on a frequency-comb-referenced absolute interferometer which instantly measures long distance by integrating multi-wavelength interferometry with direct synthetic wavelength interferometry.
Guochao Wang, Lilong Tan, Shuhua Yan
doaj +3 more sources
Microwave Absolute Distance Measurement Method with Ten-Micron-Level Accuracy and Meter-Level Range Based on Frequency Domain Interferometry [PDF]
Sensors, 2023 A microwave absolute distance measurement method with ten-micron-level accuracy and meter-level range based on frequency domain interferometry is proposed and experimentally demonstrated for the first time.
Longhuang Tang +10 more
doaj +2 more sources
High-Update-Rate (25 kHz) Laser Ranging with Random Noise Modulation for Fast and Precise Absolute Distance Measurement [PDF]
SensorsThis paper proposes a technique for precise distance measurement under laser random noise using autocorrelation demodulation. We conducted measurements within a 2 m range using a commercial digitizer with a sampling rate of 40 GS/s.
Yongchao Chen +15 more
doaj +2 more sources
An Interferometric Multi-Sensor Absolute Distance Measurement System for Use in Harsh Environments [PDF]
SensorsFourier transform-based frequency sweeping interferometry (FT-FSI) is an interferometric technique that enables absolute distance measurement by detecting the beat frequencies from the interference of reflected signals.
Mateusz Sosin +7 more
doaj +2 more sources
Impact of Cyclic Error on Absolute Distance Measurement Based on Optical Frequency Combs [PDF]
SensorsAbsolute distance measurements based on optical frequency combs (OFCs) have greatly promoted advances in both science and technology, owing to the high precision, large non-ambiguity range (NAR), and a high update rate.
Runmin Li +5 more
doaj +2 more sources
High-precision absolute distance and vibration measurement with frequency scanned interferometry [PDF]
Applied Optics, 2005 In this paper, we report high-precision absolute distance and vibration measurements performed with frequency scanned interferometry using a pair of single-mode optical fibers. Absolute distance was determined by counting the interference fringes produced while scanning the laser frequency.
Yang, Hai-Jun +3 more
openaire +7 more sources