Results 21 to 30 of about 578,588 (318)

Dual-UAV Collaborative High-Precision Passive Localization Method Based on Optoelectronic Platform

Drones, 2023
Utilizing the optical characteristics of the target for detection and localization does not require actively emitting signals and has the advantage of strong concealment.
Xu Kang, Yu Shao, Guanbing Bai, He Sun, Tao Zhang, Dejiang Wang   +5 more
doaj   +1 more source

Speed-up chromatic sensors by optimized optical filters [PDF]

, 2013
Paper 87880SThe probably best known chromatic sensor is the chromatic confocal point sensor, which is an optical displacement sensor (depicted in Fig. 1). It uses different wavelengths to encode the distance and has one measurement spot.
Taphanel, M., Beyerer, J., Hovestreydt, B., Miro Taphanel, Bastiaan Hovestreydt, Jürgen Beyerer   +5 more
core   +1 more source

Fast surface measurement using wavelength scanning interferometry with compensation of environmental noise [PDF]

, 2010
We introduce a new optical interferometry system for fast areal surface measurement of microscale and nanoscale surfaces that are immune to environmental noise.
Gao, F., Muhamedsalih, Hussam, Wang, Kaiwei, Jiang, Xiangqian, Jiang, Xiang, Gao, Feng   +5 more
core   +1 more source

Thin bonding wires temperature measurement using optical fiber sensors [PDF]

, 2011
In this work we demonstrate the use of optical fiber sensors to measure temperature in thin metallic bonding wires. Temperature was measured in copper wires with diameter of 0.10, 0.28, 0.60 and 0.70 mm and for different values of the driven electrical ...
P. Antunes, Varum, Humberto, P.S. André, Varum, H., Andre, Paulo, Lima, Hugo, Rocha, A. M., H. Lima, A.M. Rocha, Rocha, Ana, Lima, H., Antunes, P., Antunes, Paulo, H. Varum, André, P. S.   +14 more
core   +2 more sources

In situ loss measurement of direct UV written waveguides using integrated Bragg gratings [PDF]

, 2010
The propagation loss of a direct UV-written silica-on-silicon waveguide is measured using an elegant nondestructive method. The technique uses integrated Bragg grating structures, which are observed from opposing launch directions to obtain information ...
Rogers, H.L., Smith, P.G.R., Sumiaty Ambran, Ambran, S., James C. Gates, Christopher Holmes, Holmes, C., Gates, J.C., Helen L. Rogers, Peter G. R. Smith   +9 more
core   +1 more source

Force measurements with optical tweezers inside living cells [PDF]

, 2014
The force exerted by optical tweezers can be measured by tracking the momentum changes of the trapping beam, a method which is more general and powerful than traditional calibration techniques as it is based on first principles, but which has not been ...
Farre, A., Martin-Badosa, E., Josep Mas, Jordi Sancho-Parramon, Arnau Farré, Sancho-Parramon, J., Montes-Usategui, M., Mario Montes-Usategui, Mas, J., Estela Martín-Badosa   +9 more
core   +1 more source

Intelligent Ship Detection in Remote Sensing Images Based on Multi-Layer Convolutional Feature Fusion

Remote Sensing, 2020
Intelligent detection and recognition of ships from high-resolution remote sensing images is an extraordinarily useful task in civil and military reconnaissance. It is difficult to detect ships with high precision because various disturbances are present
Yulian Zhang, Lihong Guo, Zengfa Wang, Yang Yu, Xinwei Liu, Fang Xu   +5 more
doaj   +1 more source

Measurements of the Beam-Wave Fluctuations over a 142-km Atmospheric Path [PDF]

, 2006
An optical link has been established between the Canary Islands La Palma and Tenerife. A 1064-nm transmitting laser was located on La Palma whereas a BPSK communication receiver and measurement instruments were installed in ESA's OGS on Tenerife.
Perlot, Nicolas, K. Zettl, Knapek, Markus, Zettl, Karl, H. Henniger, Giggenbach, Dirk, D. Giggenbach, Henniger, Hennes, Horwath, Joachim, J. Horwath, N. Perlot, M. Knapek   +11 more
core   +1 more source

Characterization of optical fiber imaging bundles for swept-source optical coherence tomography [PDF]

, 2011
Fiber imaging bundles have been investigated for use in endoscopic optical coherence tomography (OCT) systems, to obviate the requirement for scanning components within the endoscope probe section.
Helen D. Ford, Ralph P. Tatam, Tatam, Ralph P., Ford, Helen D.   +3 more
core   +1 more source

Experimental measurement of group velocity dispersion during operation in cladding-pumped large-mode-area Yb-doped fibers [PDF]

, 2015
Paper 95253Z, 7 S.Ever higher output power of fiber lasers leads to growing requirements on the fibers used. The increasing intensity of light in the fiber core is compensated by enlargement of the area of the doped core.
Hartmann, Peter, Taudt, Christopher, Christopher Taudt, Baselt, Tobias, Lasagni, Andrés-Fabián, Peter Hartmann, Andrés-Fabián Lasagni, Tobias Baselt   +7 more
core   +1 more source