マイクロバブルのレーザートラッピグにおける光学力の評価 : 第1報 : レーザー捕捉力とマイクロバブル浮上軌跡 : 流体工学 , 流体機械

概要

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We have improved a laser trapping method to control bubble positions without contact. In this method, we use an empty laser cone obtained by focusing a laser ring. Bubbles of the order of 10 micron in diameter have been trapped and manipulated successfully using a dry objective lens with large working distance. We have also evaluated the optical force acting on a bubble both experimentally and theoretically. It is shown that the axial force is about 90 pN when the net laser power is about 110 mW. The thinner the thickness of laser curtain becomes, the stronger the optical force becomes. The trajectory of a rising bubble is calculated by taking the optical force into account. The result shows that the predicted trajectory is in good agreement with experimental data.
社団法人日本機械学会の論文
2001-02-25