Ultraviolet characterization of integrating spheres
نویسندگان
چکیده
منابع مشابه
Ultraviolet characterization of integrating spheres.
We have studied the performance of polytetrafluoroethylene integrating spheres in the ultraviolet (UV) region with wavelengths as short as 200 nm. Two techniques were used for this study; first, the spectral throughput of an integrating sphere irradiated by a deuterium lamp was analyzed by a monochromator. Second, a UV laser beam was directed into an integrating sphere, and spectrally dispersed...
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Integrating sphere reflectometers are used in the majority of instruments used for spectral reflectance measurements of non-specular (scattering) samples. Knowledge of directional-hemispherical spectral reflectance (and transmittance, in the case of semi-transparent samples) allows one to derive the spectral directional emittance , which is of considerable practical interest for numerous heat t...
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Theoretical models of the signal detected by a CCD camera during hyperspectral imaging with an integrating sphere are derived using Markov chains with absorbing states. The models provide analytical expressions that describe the real reflectance of the sample as a function of the detected signal at each pixel of the image. Validation of the models was done by using reflectance standards and tis...
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Synthetic colloidal spheres play a central role in applications as diverse as catalysis, medical diagnostics, and photonics. Even as many applications advance toward single-sphere implementations, methods for characterizing colloidal spheres typically offer only sampleaveraged overviews of such properties as spheres’ sizes and porosities. Moreover, such characterization methods as mercury adsor...
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ژورنال
عنوان ژورنال: Applied Optics
سال: 2007
ISSN: 0003-6935,1539-4522
DOI: 10.1364/ao.46.005119