Results 21 to 30 of about 167,924 (209)
Dual-Comb Absolute Distance Measurement Based on a Dual-Wavelength Passively Mode-Locked Laser
IEEE Photonics Journal, 2017 A new absolute distance measurement system is demonstrated in this paper, which is based on a dual-wavelength passive mode-locked fiber laser. By controlling the intracavity loss and spectral filtering, the cavity mode-locked by a single-wall carbon ...
Baike Lin +9 more
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Research on absolute ranging technology of resampling phase comparison method based on FMCW
Open Physics, 2023 As an advanced optical precision ranging method, FMCW (frequency-modulated continuous-wave) laser interferometric ranging technology can achieve a large-scale and high-precision absolute distance measurement, so it has high research and application value
Sun Bin +4 more
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APL Photonics, 2023 Absolute distance measurement for multiple targets is required in industrial and scientific fields such as machine monitoring, detection of distortion in large structures, wafer alignment in semiconductor manufacturing, and the formation flying of ...
Jaeyoung Jang +2 more
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Sensors, 2019 In a multifrequency phase-shifting (MFPS) algorithm, the temporal phase unwrapping algorithm can extend the unambiguous phase range by transforming the measurement range from a short fringe pitch into an extended synthetic pitch of two different ...
Duc-Hieu Duong +2 more
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Sensors, 2021 Options for monitoring sports have been continuously developed by using activity trackers to determine almost all vital and movement parameters. The aim of this study was to validate heart rate and distance measurements of two activity trackers (Polar ...
Mario Budig +4 more
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Optical Setup for Error Compensation in a Laser Triangulation System
Sensors, 2020 Absolute distance measurement is a field of research with a large variety of applications. Laser triangulation is a well-tested and developed technique using geometric relations to calculate the absolute distance to an object.
Patrick Kienle +6 more
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Characteristics of Distance Errors of Infrared Sensor Relation to Colour Surfaces
Acta Technologica Agriculturae, 2022 This paper deals with the determination of the absolute errors of a small time of flight (ToF) distance sensor with respect to coloured surfaces at different illumination intensities.
Hrubý Dušan +6 more
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Sensors, 2022 Since the dispersive interferometry (DPI) based on optical frequency combs (OFCs) was proposed, it has been widely used in absolute distance measurements with long-distance and high precision.
Qiong Niu +9 more
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Improved Algorithms of Data Processing for Dispersive Interferometry Using a Femtosecond Laser
Sensors, 2023 Two algorithms of data processing are proposed to shorten the unmeasurable dead-zone close to the zero-position of measurement, i.e., the minimum working distance of a dispersive interferometer using a femtosecond laser, which is a critical issue in ...
Tao Liu +5 more
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Scientific Reports, 2022 The existing typical combined query image retrieval methods adopt Euclidean distance as sample distance measurement method, and the model trained by triple loss function blindly pursues absolute distance between samples, resulting in unsatisfactory image
Zhiwei Zhang, Liejun Wang, Shuli Cheng
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