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17 June 2009 Development of 3D control of a tiny dew droplet by scattered laser light
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In order to study dropwise condensation on a metal plate, the method for controlling a tiny dew droplet deposited on a copper plate has been developed by using scattered laser light. The method employed the proportional control combined with shifting movement by an integrator to control the intensity of the scattered laser light constantly. Also, the control simulation of the method has been developed to confirm the usefulness of the method and the simulated three-dimensional shape of controlled dew droplet was obtained with the control action. A tiny thin dew droplet, of which the diameter was of handreds micrometers and the mass was about 10-7 g, was controlled in the atmosphere at room temperature for 60 minutes at the preset level of the intensity of scattered laser light and the three-dimensional shape of the controlled dew droplet was shown from the interference fringes.
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Shigeaki Matsumoto "Development of 3D control of a tiny dew droplet by scattered laser light", Proc. SPIE 7389, Optical Measurement Systems for Industrial Inspection VI, 73892W (17 June 2009);

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