The integral photography and deconvolution techniques have been applied to identify the three-dimensional (3D) positions of particles levitating in plasma. Artifacts in the light field, i.e. ghost particles, are removed by collating between results of integral photography and direct Richardson-Lucy deconvolution (RLD). Our reconstruction system is tested with known target particles and it is found that it works well in the range of our dust experiment. By applying the integral photography and RLD techniques to the obtained experimental image, we identified the 3D positions of dust particles floating in a radio-frequency plasma. Ghost particles are eliminated from the results by deconvolution and we succeeded in obtaining the 3D structure of a dusty plasma from a single-exposure image obtained from one view port.
This research aimed to clarify the physical effects of plasma on microorganisms levitated in radio-frequency (RF) plasma and to develop a technology for classifying and confining microorganisms by controlling their behavior when levitated. In the experiment, multiple types of microorganisms were injected into the RF plasma one by one, and their behavior was analyzed. An external electric field was applied to the plasma. The experimental results revealed that the behavior of the levitated microorganisms differs depending on the species and the magnitude of RF discharge power.
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