Results 31 to 40 of about 626,937 (305)
, 1999 The purpose of these lecture notes is to describe the gravitational lens effects in different astrophysical contexts. These notes are voluntarily focused on the fundamental mechanisms and the basic concepts that are useful to describe these effects.
Bernardeau, F.
core +2 more sources
Microfabricated rubber microscope using soft solid immersion lenses [PDF]
, 2006 We show here a technique of soft lithography to microfabricate efficient solid immersion lenses (SIL) out of rubber elastomers. The light collection efficiency of a lens system is described by its numerical aperture (NA), and is critical for applications
Gambin, Yann +2 more
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Photonics, 2021 This paper proposes the use of digital-grating moiré effect for measuring the focal lengths and radius of curvatures of biconvex and biconcave spherical simple lenses and spherical mirrors.
Chien-Yuan Han +5 more
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Using two-dimensional graphene lenses to increase the effectiveness of solar panels
Revue des Énergies Renouvelables, 2023 We aim to enhance the efficiency of solar panels by covering them with graphene lenses that collect and concentrate light rays onto the panels. The simulation was performed using the Monte Carlo method and provided precise results regarding the ...
Abid Boudiar +2 more
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Dr TIM: Ray-tracer TIM, with additional specialist scientific capabilities
, 2013 We describe several extensions to TIM, a raytracing program for ray-optics research. These include relativistic raytracing; simulation of the external appearance of Eaton lenses, Luneburg lenses and generalized focusing gradient-index (GGRIN) lenses ...
Courtial, Johannes +2 more
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Microlens Parallax Asymmetries Toward the LMC [PDF]
, 1998 If the microlensing events now being detected toward the Large Magellanic Cloud (LMC) are due to lenses in the Milky Way halo, then the events should typically have asymmetries of order 1% due to parallax from the reflex motion of the Earth. By contrast,
Andrew Gould +6 more
core +3 more sources
Advancing vision care in children – bridging science, policy, and practice
BMC PediatricsPediatric vision health is a cornerstone of child development, learning, and social well-being. This editorial synthesizes current advances, challenges, and emerging frontiers in childhood vision care as reflected in this collection, emphasizing equity ...
Bharat Gurnani, Dipesh Patel
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Changes in the Thickness of the Sublens Water Layer in Patients Using Scleral Lenses
OftalʹmologiâPurpose of the study. To analyze the change in the thickness of the sublens water layer depending on the time of wearing lenses in patients using scleral lenses using the SkyOptix Laboratory lenses as an example.Patients and methods.
O. I. Ryabenko +3 more
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Delhi Journal of Ophthalmology, 2018 Lenses and mirrors have always been an integral part of an ophthalmologist’s armamentarium. Since time immemorial curious minds have been trying to peep inside the eye using various techniques, be it indentation of the limbus and using direct ...
Aditi Singh, Meena Menon
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Photoaligning and Photopatterning: New LC Technology
Crystals, 2020 We demonstrate a physical model of photoalignment and photopatterning based on rotational diffusion in solid azo-dye nanolayers. We also highlight the new applications of photoalignment and photopatterning in display and photonics such as: (i) liquid ...
Vladimir Chigrinov +2 more
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