Results 31 to 40 of about 1,287,395 (305)

An independent distance estimate to the AGB star R Sculptoris [PDF]

, 2017
For the carbon AGB star R Sculptoris, the uncertain distance significantly affects the interpretation of observations regarding the evolution of the stellar mass loss during and after the most recent thermal pulse.
Brunner, M., De Beck, E., Maercker, M., Mecina, M.   +3 more
core   +2 more sources

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, Song Junfang, Wang Chao, Li Lanlan, Tan Linqiu   +4 more
doaj   +1 more source

Elimination of systematic errors in two-mode laser telemetry [PDF]

, 2009
4p.International audienceWe present a simple two-mode telemetry procedure which eliminates cyclic errors, to allow accurate absolute distance measurements.
Brillet, Alain, Courde, Clément, Lintz, Michel   +2 more
core   +4 more sources

Uncertainty relations for general phase spaces [PDF]

, 2016
We describe a setup for obtaining uncertainty relations for arbitrary pairs of observables related by Fourier transform. The physical examples discussed here are standard position and momentum, number and angle, finite qudit systems, and strings of ...
Werner, Reinhard F.
core   +3 more sources

High-precision frequency sweeping interferometry for absolute distance measurement using a tunable laser with sweeping range of 88 GHz

Measurement science and technology, 2020
Distance measurement using frequency sweeping interferometry is an absolute distance measurement technique that allows for high accuracy over long distances. Notwithstanding, the measurement accuracy is affected by laser sweeping nonlinearity and limited
G. Shi, K. Hei, Wen Wang, N. Bhattacharya   +3 more
semanticscholar   +1 more source

Dual-comb-based multi-axis time-of-flight measurement via high-efficiency optical cross-correlation in a semiconductor optical amplifier

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, Seung-Woo Kim, Young-Jin Kim   +2 more
doaj   +1 more source

Improvement of Distance Measurement Based on Dispersive Interferometry Using Femtosecond Optical Frequency Comb

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, Mingyu Song, Jihui Zheng, Linhua Jia, Junchen Liu, Lingman Ni, Ju Nian, Xingrui Cheng, Fumin Zhang, Xinghua Qu   +9 more
doaj   +1 more source

On the Feasibility of Absolute Distance Measurement by Using Optical Feedback Into a Superluminescent Diode Cavity

IEEE Transactions on Instrumentation and Measurement, 2020
The development of accurate absolute distance interferometers is a long-term research goal. The key impact of this article is the demonstration of an absolute distance interferometer based on the optical feedback (OF) into a superluminescent diode cavity.
L. Rovati, L. D. Cecilia, S. Cattini
semanticscholar   +1 more source

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, Jiucheng Wu, Amane Suzuki, Ryo Sato, Hiraku Matsukuma, Wei Gao   +5 more
doaj   +1 more source

First cosmological results using Type Ia supernovae from the Dark Energy Survey: measurement of the Hubble constant [PDF]

, 2019
We present an improved measurement of the Hubble constant (H0) using the `inverse distance ladder' method, which adds the information from 207 Type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) at redshift 0.018 < z < 0.85 to existing distance
Abbott, T. M. C., Allam, S., Annis, J., Asorey, J., Avila, S., Bacon, D., Bassett, B. A., Bechtol, K., Brooks, D., Brout, D., Brown, P., Burke, D. L., Calcino, J., Carollo, D., Carretero, J., Castander, F. J., Collett, T., Crocce, M., Cunha, C. E., D'Andrea, C. B., da Costa, L. N., Davis, C., Davis, T. M., De Vicente, J., Diehl, H. T., Doel, P., Drlica-Wagner, A., Eifler, T. F., Estrada, J., Evrard, A. E., Filippenko, A. V., Finley, D. A., Flaugher, B., Foley, R. J., Fosalba, P., Frieman, J., Galbany, L., García-Bellido, J., Gaztanaga, E., Glazebrook, K., González-Gaitán, S., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hartley, W. G., Hinton, S. R., Hollowood, D. L., Honscheid, K., Hoormann, J. K., Hoyle, B., Huterer, D., Jain, B., James, D. J., Jeltema, T., Kasai, E., Kessler, R., Kim, A. G., Kind, M. Carrasco, Krause, E., Kuehn, K., Kuropatkin, N., Lahav, O., Lasker, J., Lewis, G. F., Li, T. S., Lidman, C., Lima, M., Lin, H., Macaulay, E., Maia, M. A. G., Marshall, J. L., Martini, P., Miquel, R., Möller, A., Nichol, R. C., Nugent, P., Palmese, A., Pan, Y. -C., Plazas, A. A., Romer, A. K., Roodman, A., Rosell, A. Carnero, Sako, M., Sanchez, E., Scarpine, V., Schindler, R., Schubnell, M., Scolnic, D., Serrano, S., Sevilla-Noarbe, I., Sharp, R., Smith, M., Soares-Santos, M., Sobreira, F., Sommer, N. E., Suchyta, E., Sullivan, M., Swann, E., Swanson, M. E. C., Tarle, G., Thomas, D., Thomas, R. C., Tucker, B. E., Uddin, S. A., Vikram, V., Walker, A. R., Wiseman, P., Zhang, B.   +108 more
core   +5 more sources