Refractive Distortions of Two-Particle Correlations

Refractive Distortions of Two-Particle Correlations from Classical Trajectory Calculations

Particle Size Distribution Retrieval from Multispectral Optical Depth: Influences of Particle Nonsphericity and Refractive Index

Retrieval of size distributions from multispectral optical depth measurements requires solution of an illposed inverse problem. The illposedness causes problems such as solution ambiguity. Size distribution retrieval becomes more complicated in the presence of nonspherical particles and/or refractive index errors. A new retrieval algorithm is first developed that allows for both smoothing and n...

Final State Distortions in Two-particle Correlations

Final state interactions in two-particle interferometry is considered for two-particle potentials which are the Coulomb plus “strong” one. For a simple model of the source we provide a full numerical calculation of the correlation function with taking into account two-particle Coulomb interaction plus final state strong interaction. It is found that for small sources (R0 = 1− 4 fm) the contribu...

Adaptive particle image velocimetry based on sharpness metrics

Background: Optical distortions can significantly deteriorate the measurement accuracy in particle image velocimetry systems. Such distortions can occur at fluctuating phase boundaries during flow measurement and result from the accompanied refractive index changes. The usage of a wavefront sensor can be hindered by disturbing light reflexes or scattering. Methods: A combination of sharpness me...

Are optical distortions used as a cue for material properties of thick transparent objects?

Fleming, Jäkel, and Maloney (2011) asked subjects to match perceived material properties of thick, clear transparent objects in photo-realistic scenes by adjusting the refractive index. They found approximate correspondence between standard and test objects but also large systematic deviations. Nevertheless, they concluded that estimated refraction is used as an indicator for material propertie...