Results 21 to 30 of about 1,287,395 (305)
Optics Express, 2021 Absolute distance measurement with laser interferometry has the advantages of high precision and traceability to the definition of meter but its accuracy is primarily limited by the phase demodulation.
Liping Yan +4 more
semanticscholar +1 more source
IEEE Photonics Journal, 2021 We utilize singular spectrum analysis (SSA) for post-processing distance measurement data obtained by a dual-comb femtosecond laser rangefinder. Signal denoising technique based on SSA allows detection of low amplitude vibrations from time series of ...
Hui Cao +3 more
doaj +1 more source
Absolute distance measurement with a gain-switched dual optical frequency comb.
Optics Express, 2021 The measurement of distance plays an important role in many aspects of modern societies. In this paper, an absolute distance measurement method for arbitrary distance is proposed and demonstrated using mode-resolved spectral interferometry with a gain ...
K. Hei +5 more
semanticscholar +1 more source
Measurement: Sensors, 2021 Water-guided laser processing have been widely used because of low heat affected zone and high aspect ratio processing. However, its processing point is not determined and must be measured with several μm accuracy.
Shusei Masuda +3 more
doaj +1 more source
Absolute distance measurements by laser interferometry [PDF]
International Conference on Space Optics — ICSO 1997, 2019 A double-channel Michelson type interferometer is presented which allows absolute distance measurement up to 3 m with an uncertainty of 0.1 um. It used the principle of synthetic wavelength and can be used under vacuum or in any gaseous medium with the help of a new type of source called an air-wavelength standard.
Rachel Thibout +5 more
openaire +1 more source
Vibration Compensation of the Frequency-Scanning-Interferometry-Based Absolute Ranging System
Applied Sciences, 2019 The frequency-scanning-interferometry-based (FSI-based) absolute ranging technology is a type of ranging technology possessing a high precision and no ranging blind area, so it can be used for non-cooperative targets. However, due to a tiny movement of a
Fu-Min Zhang +4 more
doaj +1 more source
Absolute distance measurements using two-mode laser telemetry [PDF]
International Conference on Space Optics — ICSO 2008, 2017 A novel laser ranging method is described that uses a two-mode laser source, and detection of the phase of the return beam. The design eliminates the cyclic error usually associated with phase measurements and provides unambiguous, absolute distance determination. Measurements of an ≈ 8m path are obtained at a beat frequency of 13 GHz.
Lintz, Michel +3 more
openaire +2 more sources
The distance to the Vela pulsar gauged with HST parallax oservations [PDF]
, 2001 The distance to the Vela pulsar (PSR B0833-45) has been traditionally assumed to be 500 pc. Although affected by a significant uncertainty, this value stuck to both the pulsar and the SNR. In an effort to obtain a model free distance measurement, we have
A. De Luca +12 more
core +2 more sources
Interferometry for High Resolution Absolute Distance Measuring by Larger Distances [PDF]
, 1994 Among the incoherent techniques the phase measurement of modulated light seem to have reached some limitation with an resolution of less than 1 mm. This limitation is set by the bandwidth of the photodetector. The coherent techniques operate with two wavelengths to extend the unambiguity range of the classical interferometry.
Dalhoff, Ernst +3 more
openaire +1 more source
Applied Sciences, 2020 We report an absolute interferometer configured with a 1 GHz microwave source photonically synthesized from a fiber mode-locked laser of a 100 MHz pulse repetition rate.
Wooram Kim +5 more
doaj +1 more source