Abstract
The images of semitransparent objects, if taken from many angles or at many frequencies, can be reconstructed into an accurate description of such objects. These methods can be used with radiation or acoustic beams, in emission or absorption, on intensities or phase velocities, or in any hybrid combination of the above. In this paper, the back filtering methods are compared with the iterative superposition methods. The problems arising from the desirability of both wide angular coverage and high speed measurement rates are considered in the context of various fluid dynamics cases.
© 1986 Optical Society of America
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