Device for trapping or stretching microscopic substance and method thereof

摘要

The present invention provides a device for trapping or stretching a microscopic substance comprising (a) a light source for irradiating laser beam; (b) an acousto-optic modulator (AOM) for regulating the direction of said laser beam irradiating from said light source; (c) a beam-expander for expanding and collimating the light beam emitting from said AOM; (d) an object lens for focusing the laser beam passing through said beam-expander; and (e) an incoherent light source for imaging said microscopic substance. The present invention further provides a method for trapping or stretching a microscopic substance comprising (a) providing a focused laser beam to form a focal spot and (b) scanning a plurality of points on said microscopic substance by said focal spot by way of the AOM.