Characterization of aerosol scattering and spectral absorption by unique methods: a polar/imaging nephelometer and spectral reflectance measurements of aerosol samples collected on filters

2010 ◽  
Author(s):  
Gergely Dolgos ◽  
J. Vanderlei Martins ◽  
Lorraine A. Remer ◽  
Alexandre L. Correia ◽  
Manfredo Tabacniks ◽  
...  
Keyword(s):  
Spectral Reflectance ◽  
Spectral Absorption ◽  
Aerosol Scattering ◽  
Reflectance Measurements

Characterization of Quantum well Structures Using Microscope-Spectrophotometry

1993 ◽  
Vol 324 ◽  
Author(s):  
Rachel M Geatches ◽  
Karen J Reeson ◽  
Alan J Criddle ◽  
Roger P Webb
Keyword(s):  
Quantum Wells ◽  
Spectral Reflectance ◽  
Visible Spectrum ◽  
Ultra Violet ◽  
Measurement Range ◽  
Aluminium Content ◽  
Quantum Well Structures ◽  
Nondestructive Characterization ◽  
Reflectance Measurements

AbstractIn this paper the application of microscope-spectrophotometry to the nondestructive characterization of a variety of multi-layer GaAs/A1GaAs structures, is described. Spectral reflectance results are used to indirectly determine variations in aluminium content, and the interdependency of aluminium content with layer thicknesses. The penetration depth of light from the visible spectrum is assessed from the correlation between spectral reflectance measurements and fitted optical models. Finally, a series of single quantum wells are investigated, and it is concluded that a significant improvement in the characterization of these materials will be achieved with an extension of the spectral measurement range into the ultra violet.

Regional predictions of soil organic carbon content from spectral reflectance measurements

2009 ◽  
Vol 104 (3) ◽  
pp. 442-446 ◽  
Author(s):  
H. Aïchi ◽  
Y. Fouad ◽  
C. Walter ◽  
R.A. Viscarra Rossel ◽  
Zohra Lili Chabaane ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Content ◽  
Spectral Reflectance ◽  
Organic Carbon Content ◽  
Soil Organic Carbon Content ◽  
Reflectance Measurements

Synthesis and Characterization of Magnetic Al/NiO Composite Pigments with Low Infrared Emissivity

2017 ◽  
Vol 898 ◽  
pp. 1561-1568 ◽  
Author(s):  
Yun Feng Liu ◽  
Jian Liang Xie ◽  
Mei Luo ◽  
Bo Peng ◽  
Long Jiang Deng
Keyword(s):  
Magnetic Properties ◽  
Efficient Method ◽  
Spectral Reflectance ◽  
Synthesis And Characterization ◽  
Magnetic Composite ◽  
Infrared Emissivity ◽  
Flowing Liquid ◽  
Aluminum Flake ◽  
Addition Amount

Generally, traditional low infrared coatings based on metallic pigments cannot have low lightness, low infrared emissivity and low radar reflectivity simultaneously. Herein, we used a simple and efficient method to synthesize magnetic Al/NiO composite pigments which possessed all these attributes to a degree. The results indicated that the covering area of NiO on the aluminum flake could be tuned by the addition amount of NiCO3 and the reaction temperature of hot-flowing, both of which played a key role on the VIS/IR spectral reflectance and magnetic properties. The magnetic Al/NiO composite pigments with low lightness and low infrared emissivity could be obtained at 130 °C for 24 h in hot flowing liquid. The lightness L* could be decreased to 75.94, however the infrared emissivity (8-14 μm) was also low to 0.421. Compared with the single aluminum flakes, the Al/NiO magnetic composite pigments presented stronger magnetic properties. Therefore, the Al/NiO magnetic composite pigments offered a new choice for the pigments of multispectral stealth coating.

Characterization of soil's structural crust by spectral reflectance in the SWIR region (1.2-2.5 mum)

Terra Nova ◽  
2001 ◽  
Vol 13 (1) ◽  
pp. 12-17 ◽  
Author(s):  
N. Goldshleger ◽  
E. Ben-Dor ◽  
Y. Benyamini ◽  
M. Agassi ◽  
D. G. Blumberg
Keyword(s):  
Spectral Reflectance
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