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Použití klasického digitálního fotoaparátu pro fotografii v blízkém IR záření
Hošek, Jan
The goal of the presented work was to use the standard CCD photographic camera for visualization of near IR spectral source. Almost every standard CCD camera chip is usually sensitive not only in visible spectral range but the maximum of spectral sensitometric characteristics of CCD chip is around wavelength 800 nm. In order to be possible take snapshots with standard CCD photographic camera without color distortion caused by near IR illumination the sensitivity of the camera chip is artificially decreased.
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Jednoobjektivový systém pro měření pozice a velikosti bublin
Hošek, Jan
Modern symmetry group theory provides constructive procedures for finding similarity transformations and invariants, leading to fundamental change in the similarity solutions of shear flows, based so far on inspection analysis, ad hoc assumptions, and physical considerations. The new approach is here demonstrated on classical Stokes' (1851) problem of the suddenly accelerated flow above a stationary flat plate, with the gradual growth of boundary layer thickness.
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