Abstract
This paper describes a novel measurement technique for three dimensional shape of micro droplet utilizing micro LIF (Laser Induced Fluorescence) technique. A measurement system consisted of microscope equipped with 10x lens, high sensitive CCD camera, CW Nd:YAG laser, optical filters and so on. Calibration curve between thickness of droplet and emission of fluorescence dye was carried out by the use of the PDMS microchip, whose depth varied from 8 to 120 μm. Measurement accuracy was about 2 μm assessed using laser displace meter. The technique is useful to investigate a two phase flow in micro scale.
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