Absorption of solar radiation by clouds and aerosols in the visible wavelength region

1998 ◽  
Vol 65 (1-2) ◽  
pp. 1-10 ◽  
Author(s):  
K. Ya Kondratyev ◽  
V. I. Binenko ◽  
I. N. Melnikova
Keyword(s):  
Solar Radiation ◽  
Wavelength Region ◽  
Visible Wavelength

scholarly journals Investigation of optical and photoelectric properties of poly (ohydroxyamide) sensitized by phthalocyanine as a perspective material for solar cells

2020 ◽  
Vol 220 ◽  
pp. 01019
Author(s):  
Elvira Fazalova ◽  
Konstantin Kochunov ◽  
Elena Bodyago ◽  
Georgii Konoplev ◽  
Nikolay Mukhin ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Radiation ◽  
Near Infrared ◽  
Wavelength Region ◽  
Organic Dye ◽  
Glass Substrates ◽  
Photoelectric Properties ◽  
Zinc Phthalocyanines ◽  
Infrared Spectral ◽  
Potential Use

Optical and photoelectric properties of poly (ohydroxyamide) (PHA) sensitized with zinc phthalocyanines were investigated in the visible and near infrared spectral regions. The structures were deposited on glass substrates by centrifugation and subsequent drying of a PHA film without thermal annealing. Optical spectra revealed characteristic absorption peaks of phthalocyanine in the longer wavelength region at 620-640 nm and 680-700 nm; absorption of the PHA matrix monotonously increases to the shorter wavelengths starting from 700 nm. Measurements of the photocurrent under irradiation with a high-power LED at a wavelength 630 nm showed photoconductivity related to the organic dye; photoconductivity also was observed while irradiated at 540 nm, presumably due to the absorption of PHA matrix. For non-sensitized (dye-free) PHA films no detectable photocurrents were produced by 630 nm irradiation. It was shown that introducing of phthalocyanines significantly improves optical absorption and photoconductivity of PHA thin films at the wavelengths, where the maximum in the spectral distribution of solar radiation lies. It was concluded that phthalocyanine-sensitized PHA has the potential use as a photosensitive organic material for solar applications, for example in developing composite organicinorganic structures with ferroelectrics.

Freestanding non-periodic GaN gratings in visible wavelength region

2017 ◽  
Vol 25 (12) ◽  
pp. 3020-3026
Author(s):  
王永进 WANG Yong-jin ◽  
张锋华 ZHANG Feng-hua ◽  
高绪敏 GAO Xu-min ◽  
施 政 SHI Zheng
Keyword(s):  
Wavelength Region ◽  
Visible Wavelength

scholarly journals A fast visible-wavelength 3D radiative transfer model for numerical weather prediction visualization and forward modeling

2020 ◽  
Vol 13 (6) ◽  
pp. 3235-3261
Author(s):  
Steven Albers ◽  
Stephen M. Saleeby ◽  
Sonia Kreidenweis ◽  
Qijing Bian ◽  
Peng Xian ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Radiative Transfer ◽  
Numerical Weather Prediction ◽  
Land Surface ◽  
Weather Prediction ◽  
Lower Boundary ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Numerical Weather ◽  
Visible Wavelength

Abstract. Solar radiation is the ultimate source of energy flowing through the atmosphere; it fuels all atmospheric motions. The visible-wavelength range of solar radiation represents a significant contribution to the earth's energy budget, and visible light is a vital indicator for the composition and thermodynamic processes of the atmosphere from the smallest weather scales to the largest climate scales. The accurate and fast description of light propagation in the atmosphere and its lower-boundary environment is therefore of critical importance for the simulation and prediction of weather and climate. Simulated Weather Imagery (SWIm) is a new, fast, and physically based visible-wavelength three-dimensional radiative transfer model. Given the location and intensity of the sources of light (natural or artificial) and the composition (e.g., clear or turbid air with aerosols, liquid or ice clouds, precipitating rain, snow, and ice hydrometeors) of the atmosphere, it describes the propagation of light and produces visually and physically realistic hemispheric or 360∘ spherical panoramic color images of the atmosphere and the underlying terrain from any specified vantage point either on or above the earth's surface. Applications of SWIm include the visualization of atmospheric and land surface conditions simulated or forecast by numerical weather or climate analysis and prediction systems for either scientific or lay audiences. Simulated SWIm imagery can also be generated for and compared with observed camera images to (i) assess the fidelity and (ii) improve the performance of numerical atmospheric and land surface models. Through the use of the latter in a data assimilation scheme, it can also (iii) improve the estimate of the state of atmospheric and land surface initial conditions for situational awareness and numerical weather prediction forecast initialization purposes.

Raman Imaging System with Dual Holographic Grating Tunable Filter

1994 ◽  
Vol 48 (8) ◽  
pp. 1015-1020 ◽  
Author(s):  
David M. Pallister ◽  
Anurag Govil ◽  
Michael D. Morris ◽  
Willis S. Colburn
Keyword(s):  
Integrated Circuit ◽  
Imaging System ◽  
Wavelength Region ◽  
Tunable Filter ◽  
Raman Imaging ◽  
Holographic Grating ◽  
Filter Performance ◽  
Visible Wavelength ◽  
Mineral Inclusions ◽  
Average Transmission

A tunable filter is described for microscopic Raman imaging. The filter employes two matched-volume holographic transmission gratings in a dispersion/dedispersion configuration and is useful throughout the visible wavelength region. Average transmission is greater than 75%. The filter performance is demonstrated with brightfield images of a bar target, Raman images of a silicon integrated circuit, and brightfield images of mineral inclusions in glass.

Light-induced wide range color switching of liquid crystal blue phase doped with hydrogen-bonded chiral azobenzene switches

RSC Advances ◽  
2014 ◽  
Vol 4 (54) ◽  
pp. 28597-28600 ◽  
Author(s):  
Ouyu Jin ◽  
Dengwei Fu ◽  
Jie Wei ◽  
Huai Yang ◽  
Jinbao Guo
Keyword(s):  
Liquid Crystal ◽  
Wavelength Region ◽  
Visible Wavelength ◽  
Wide Range ◽  
Blue Phase ◽  
Color Switching ◽  
Hydrogen Bonded

Reversible phototuning of the reflection color of BP I over the visible wavelength region was achieved in a LC-BPs by employing a new kind of H-bonded chiral azobenzene switches.

High-power stability of optical fibers for the visible wavelength region

2001 ◽  
Author(s):  
Johannes Kirchhof ◽  
Sonja Unger ◽  
Siegmund Schroeter ◽  
Anka Schwuchow ◽  
Holger Frost ◽  
...  
Keyword(s):  
Optical Fibers ◽  
High Power ◽  
Wavelength Region ◽  
Power Stability ◽  
Visible Wavelength
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