Results 21 to 30 of about 753,519 (186)

The impact of polarization‐maintaining and multimode fibre lengths on strain and temperature sensitivities of single‐mode–multimode–polarization‐maintaining–multimode–single‐mode‐based fibre optic sensors

open access: yesIET Optoelectronics, 2021
A fibre loop mirror sensor is proposed and demonstrated for strain and temperature measurements in experiment. In these schemes, fibre loop mirrors are constructed with single‐mode‐multimode‐polarization‐maintaining‐multimode‐single‐mode optical fibre ...
Jinpeng Wei   +5 more
doaj   +1 more source

Chinese mirrors from the burials of the nomads of Eastern Europe of the second half of the 1st millennium BCE — first centuries CE: typology, chronology, distribution and technology of manufacture [PDF]

open access: yesМатериалы по археологии и истории античного и средневекового Причерноморья, 2022
This article is devoted to Chinese mirrors found in the burials of the nomads of Asian Sarmatia. The typology and chronology of mirrors are presented.
Ravich, I., Treister, M.
doaj   +1 more source

System design of gyro north-seeker calibration system

open access: yesThe Journal of Engineering, 2019
Aimed at the metrology support requirements of weapons found north orientation equipment, a gyro north-seeker calibration system is designed. The system uses one plane mirror and two 1 m collimators to set up three north benchmarks at the same time, and ...
Yongjie Fu
doaj   +1 more source

Optical Characterization of a New Facility for Materials Testing under Concentrated Wavelength-Filtered Solar Radiation Fluxes

open access: yesSolar, 2023
The materials used to manufacture solar receivers for tower power plants must withstand high fluxes of concentrated solar radiation (from 0.1 to even 1.5 MWm−2) and operate at high operating temperatures (>800 °C).
Noelia Estremera-Pedriza   +2 more
doaj   +1 more source

Space-enhanced terrestrial solar power for equatorial regions [PDF]

open access: yes, 2019
This Paper investigates the concept of solar mirrors in an Earth orbit to provide large-scale terrestrial equatorial solar farms with additional solar power during the hours of darkness. A flower constellation of mirrors is considered in highly eccentric
Bonetti, F., McInnes, C.
core   +1 more source

Understanding what is visible in a mirror or through a window before and after updating the position of an object.

open access: yesFrontiers in Human Neuroscience, 2014
In the Venus effect observers assume that Venus is admiring her own reflection in the mirror (Bertamini et al. 2003). However, since the observer sees her face in the mirror, Venus is actually looking at the reflection of the painter.
Marco eBertamini
doaj   +1 more source

High Power and Contamination Properties of All-Silica High Reflectivity Multilayers

open access: yesIEEE Photonics Journal, 2021
Optical multilayers created from a single material have been demonstrated to have lower stress and lower thermal expansion mismatch than standard two-material coatings; however, questions of high power operation and vulnerability to environmental ...
Phyo Lin   +5 more
doaj   +1 more source

Czas, ulice i lustra — „Cléo od piątej do siódmej” Agnès Vardy

open access: yesStudia Filmoznawcze
This article focuses on the analysis of Agnès Varda’s Cléo from 5 to 7, mainly examining three elements—time, places and the motif of mirrors. The text discusses relations between these layers and how these problems affect the main character.
Norbert Pilarz
doaj   +1 more source

Beam divergence studies on a hard edge unstable resonators for a long pulse XeCl excimer laser [PDF]

open access: yes, 1997
The focusability of a long pulse XeCl excimer laser has been improved using confocal positive branch unstable resonators where the outcoupling is done through the convex mirror. A nearly diffraction limited output beam is obtained from hard edge unstable
Goor, F.A. van   +2 more
core   +3 more sources

Mirror, mirror.

open access: yesJournal of the Mississippi State Medical Association, 2012
Using mirrors gives children the opportunity to explore reflection and symmetry, and to look at shapes and objects in new and exciting ways, writes Viv Hampshire.
  +7 more sources

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