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Showing 1 to 13 of 13 for “"integrating sphere"”.
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Design, construction, & calibration of a sixty-inch integrating sphere photometer
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science, 1932
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Building a better flat-field : an instrumental calibration projector for the Large Synoptic Survey Telescope
… an alternative projector prototype, based on an integrating sphere, that satisfies each criterion well within our tolerances. The magnitude of improvement granted by the integrating sphere projector suggests that future work further investigate this approach.
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Hyper-Spectral Sensor Calibration Extrapolated from Multi-Spectral Measurements
… solution to the attenuation of flux within an integrating sphere, the best laboratory source of non-directional radiance for numerous radiometric applications, is given. Relative component attenuations due to integrating sphere coating, exit port escape, and atmospheric absorption are derived …
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Nanomorphology dependent optical and mechanical properties of aerogels
… Light scattering (haze) was studied with an integrating sphere, thermal conductivity with the hot plate method and mechanical strength with uniaxial compression. Delamination of wet-gels from glass substrates during drying into aerogels was traced to the nature mass fractal of the secondary …
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An experimental investigation of diffuse optical scattering from stationary and flowing dispersions
… the single fibre bundle and the conventional integrating sphere method show good agreement, but only after making large specular reflectance corrections in the latter case. Measurements made on latex volume fractions (v) up to 0.4 showed a maximum in S at about v = 0.2, Interpreted as …
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SOLAR MIRRORS CHARACTERIZATION FOR CONCENTRATING SOLAR POWER TECHNOLOGY
… at different characterization steps; - An integrating sphere of 150 mm in diameter (DRA ¡V Diffuse Reflectance Accessory); - A VASRA (Variable Angle Specular Reflection Accessory); - A UV chamber to accelerate the ageing process; - A £gScan SMS Scatterometer for RMS Roughness and BDSF …
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The maximum quantum efficiency of CO2 assimilation declines with depth in the canopies of the C4 crops Miscanthus x giganteus and Zea mays
… fractional light absorptance (α) measured in an integrating sphere. In addition, dark-adapted maximum quantum yield of photosystem II (PSII; ΦPSII, max), operating yields of CO2 assimilation (ΦCO2), and PSII photochemistry (ΦPSII) were determined. These allowed calculation and analysis of …
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Quantum Yields And Mechanism In Titanium Dioxide Mediated Photocatalysis
… suspensions. In this procedure a modified integrating sphere method was used for the measurement of the absorbance of TiO{dollar}sb2{dollar} suspensions. A ferrioxalate chemical actinometer was used to measure the flux of absorbed photons. As a check on the method, good agreement with well …
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Beam profile characterization of light-emitting-diode curing units and its effect on polymerization of a resin-matrix composite
… with LCU power measurements obtained using an integrating sphere/spectrometer assembly. The influence of distance on irradiance, radiant exposure (RE) and degree of conversion (DC) on the top and bottom surfaces of a RMC increment, using various LCUs, at two clinically relevant distances was …
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The Hemispherical Blackbody (HSBB) for improved traceability of longwave downward radiation
… infrared radiation that is emitted in the atmosphere and incident on the surface of the Earth. It is directly related to the greenhouse effect of the Earth and therefore particularly interesting for climate related research in the context of climate change. Measurements of longwave downward …
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Upconversion quantum yield and luminescence of beta-NaYF4:Yb3+,Er3+ nanoparticles
… purpose, in the first study of this thesis an integrating sphere setup (ISS), as well as corresponding relevant guidelines for the measurement conditions, has been developed enabling the absolute determination of the key parameter upconversion quantum yield &Phi UC with minimum uncertainty …
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Spojování světla dvou zdrojů v integrační sféře
Novo vyvíjaná generácia koherenciou riadeného holografického mikroskopu bude vybavená fluorescenčným modulom. Práca pojednáva o základných princípoch a aplikácii fluorescenčnej mikroskopie vrátane popisu holografického mikroskopu. Je vykonaná a vyhodnotená rešerš dostupných svetelných zdrojov …