THE DIFFRACTION CHARACTER OF ER FLUIDS AND EMR FLUIDS
电流变液与电—磁流变液的衍射特性

In this paper,the diffraction character of ER fluids has been studied. It is found that ERfluid can be considered as an optical grating when an external electric field is applied. With the electricfield to be rising, the grating constants increase, that is, the grating is adjustable. Meanwhile,EMR fluids are studied in different condition. When an electric -field and a magnetic field are applied atthe same time, each other perpendicularly,a two-dimension mesh structure is found in EMR fluids,and the laser diffraction fringe photograph has been obtained.