Results 11 to 20 of about 8,275,469 (344)

Design of a Multipoint Cost-Effective Optical Instrument for Continuous In-Situ Monitoring of Turbidity and Sediment. [PDF]

Sensors (Basel), 2020
A cost-effective optical instrument for continuous in-situ monitoring applications is presented. With a production cost in raw materials of 38 €, a power consumption of 300 µA in sleep mode and 100 mA in active mode (5 ms reading), and a capacity to ...
Matos T, Faria CL, Martins MS, Henriques R, Gomes PA, Goncalves LM.   +5 more
europepmc   +2 more sources

Accelerated measurement of perikymata by an optical instrument. [PDF]

Biomed Opt Express, 2013
The proposed device considerably reduces the measuring time of important microscopic features of tooth crown surfaces. The instrumentation is accompanied by a computer program to analyse the results.
Elhechmi I, Braga J, Dasgupta G, Gharbi T.   +3 more
europepmc   +2 more sources

The Optical Corrector for the Dark Energy Spectroscopic Instrument [PDF]

Astronomical Journal, 2023
The Dark Energy Spectroscopic Instrument (DESI) is currently measuring the spectra of 40 million galaxies and quasars, the largest such survey ever made to probe the nature of cosmological dark energy.
T. Miller, P. Doel, G. Gutierrez, R. Besuner, D. Brooks, G. Gallo, H. Heetderks, P. Jelinsky, S. Kent, M. Lampton, M. Levi, M. Liang, A. Meisner, M. Sholl, J. Silber, D. Sprayberry, J. Aguilar, A. de la Macorra, D. Eisenstein, K. Fanning, A. Font-Ribera, E. Gaztañaga, S. Gontcho, K. Honscheid, J. Jiménez, D. Joyce, R. Kehoe, T. Kisner, A. Kremin, M. Landriau, L. Le Guillou, C. Magneville, P. Martini, R. Miquel, J. Moustakas, J. Nie, W. Percival, C. Poppett, F. Prada, G. Rossi, D. Schlegel, M. Schubnell, H. Seo, R. Sharples, G. Tarlé, M. Vargas-Magaña, Zhi-Min Zhou   +46 more
semanticscholar   +1 more source

The Near-Infrared Spectrograph (NIRSpec) on the James Webb Space Telescope. I. Overview of the instrument and its capabilities [PDF]

Astronomy & Astrophysics, 2022
We provide an overview of the design and capabilities of the near-infrared spectrograph (NIRSpec) onboard the James Webb Space Telescope. NIRSpec is designed to be capable of carrying out low-resolution ($R\!=30\!-330$) prism spectroscopy over the ...
P. Jakobsen, P. Ferruit, C. A. de Oliveira, S. Arribas, G. Bagnasco, R. Barho, T. L. Beck, S. Birkmann, T. Böker, A. Bunker, S. Charlot, P. de Jong, G. de Marchi, R. Ehrenwinkler, M. Falcolini, R. Fels, M. Franx, D. Franz, M. Funke, G. Giardino, X. Gnata, W. Holota, K. Honnen, P. Jensen, M. Jentsch, T. Johnson, D. Jollet, H. Karl, G. Kling, J. Kohler, M. Kolm, N. Kumari, M. Lander, R. Lemke, M. López-Caniego, N. Lutzgendorf, R. Maiolino, E. Manjavacas, A. Marston, M. Maschmann, R. Maurer, B. Messerschmidt, S. Moseley, P. Mosner, D. Mott, J. Muzerolle, N. Pirzkal, J. Pittet, A. Plitzke, W. Posselt, B. Rapp, B. Rauscher, T. Rawle, H. Rix, A. Rodel, P. Rumler, E. Sabbi, J. Salvignol, T. Schmid, M. Sirianni, C. Smith, P. Strada, M. Plate, J. Valenti, T. Wettemann, T. Wiehe, M. Wiesmayer, C. Willott, R. Wright, P. Zeidler, C. Zincke   +70 more
semanticscholar   +1 more source

A review of common-path off-axis digital holography: towards high stable optical instrument manufacturing

Light: Advanced Manufacturing, 2021
Digital holography possesses the advantages of wide-field, non-contact, precise, and dynamic measurements for the complex amplitude of object waves. Today, digital holography and its derivatives have been widely applied in interferometric measurements ...
Ji-Wei Zhang, Si-Qing Dai, Chao-Jie Ma, Te-Li Xi, Jiang-Lei Di, Jianlin Zhao   +5 more
semanticscholar   +1 more source

The increase of students’ critical thinking abilities on optical instrument topic through pbl-stem with virtual simulation media

Journal of Physics, Conference Series, 2021
The optical instrument topic is considered difficult because of its abstract nature, and it involves mathematics so that it resulted in the low critical thinking abilities (CTA) on students.
Parno, S. Fauziyah, N. A. Pramono, R. Anggraini, A Hidayat, E. Supriana, M. Ali   +6 more
semanticscholar   +1 more source

A Novel Strategy for Rapid Fluorescence Detection of FluB and SARS-CoV-2

Molecules, 2023
Undoubtedly, SARS-CoV-2 has caused an outbreak of pneumonia that evolved into a worldwide pandemic. The confusion of early symptoms of the SARS-CoV-2 infection with other respiratory virus infections made it very difficult to block its spread, leading to
Zhijin Yang, Zhiwei Xue, Kejie Zheng, Yule Zhang, Guorong Sui, Haima Yang, Songlin Zhuang, Lulu Zheng, Dawei Zhang   +8 more
doaj   +1 more source

3D free-assembly modular microfluidics inspired by movable type printing

Microsystems & Nanoengineering, 2023
Reconfigurable modular microfluidics presents an opportunity for flexibly constructing prototypes of advanced microfluidic systems. Nevertheless, the strategy of directly integrating modules cannot easily fulfill the requirements of common applications ...
Shaoqi Huang, Jiandong Wu, Lulu Zheng, Yan Long, Junyi Chen, Jianlang Li, Bo Dai, Francis Lin, Songlin Zhuang, Dawei Zhang   +9 more
doaj   +1 more source

Quantum-assisted optical interferometers: instrument requirements [PDF]

Astronomical Telescopes + Instrumentation, 2020
It has been recently suggested that optical interferometers may not require a phase-stable optical link between the stations if instead sources of quantum-mechanically entangled pairs could be provided to them, enabling extra- long baselines and ...
A. Nomerotski, P. Stankus, A. Slosar, S. Vintskevich, Shane Andrewski, G. Carini, D. Dolzhenko, D. England, E. Figueroa, Sonali Gera, J. Haupt, S. Herrmann, D. Katramatos, M. Keach, A. Parsells, O.-P. Saira, J. Schiff, P. Svihra, T. Tsang, Ying-Wen Zhang   +19 more
semanticscholar   +1 more source

Multimodal predictive classification of Alzheimer's disease based on attention‐combined fusion network: Integrated neuroimaging modalities and medical examination data

IET Image Processing, 2023
Early diagnosis of Alzheimer's disease (AD) plays a key role in preventing and responding to this neurodegenerative disease. It has shown that, compared with a single imaging modality‐based classification of AD, synergy exploration among multimodal ...
Hui Chen, Huiru Guo, Longqiang Xing, Da Chen, Ting Yuan, Yunpeng Zhang, Xuedian Zhang   +6 more
doaj   +1 more source