نتایج جستجو برای: photochromic lens
تعداد نتایج: 52071 فیلتر نتایج به سال:
Fluorescent switching systems containing photochromic molecules have attracted significant attention on account of their potential uses as optical memory media and photoswitchable devices. Most systems offering the photomodulation of luminescence involve a photochrome covalently linked to an organic or metal–organic fluorophore, wherein the luminescence is regulated by an intramolecular energy ...
Objective- Assessment of the lens anterior – posterior (AP) diameter as compared with the eye globe by ultrasonography in rabbit. Design- Descriptive study. Animals- 120 male and female rabbits, two months to four years old, and weighting between 300 to 1500gr. Procedures- 2D ultrasonography of the eyes was performed and AP diameter of the eyes and lens were measured using Sonosite Tit...
Horn antennas can result in good impedance matching between the waveguide and free space due to the gradual increase in the aperture size. In this paper, a novel plasmonic sectoral horn nanoantenna based on using lens in the aperture is proposed. It is investigated that in addition to improvement of the directivity, the reflection coefficient is also reduced using the proper lens structure. The...
We report a theoretical study of single molecule conduction switching of photochromic dithienylethene molecules. The light-induced intramolecular transformation drives a swapping of the highest occupied molecular orbital and lowest unoccupied molecular orbital between two distinct conjugated paths. The shuffling of single and double bonds produces a significant conductance change when the molec...
Photochromic oxygen-containing yttrium-hydride thin films are synthesized by argon magnetron sputtering on microscope slides. Some of them encapsulated with a thin, transparent, and nonphotochromic diffusion-barrier layer either Al2O3 or Si3N4. Ion-beam-based methods prove that these protective diffusion barriers stable free from pinholes, thicknesses only few tens nanometers. Optical spectroph...
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