Figure 6.

(a) The optical microscope image indicating the trajectories of blood cells, (b) the fluorescent microscope image of HeLa cells, and (c) the superimposed image at the outlet of the double spiral channel at 40 ml/h. HeLa cells are stained with green and 20 × diluted blood cells are unstained. (a′)–(c′) The optical, fluorescent and superimposed microscope images taken at the outlet of the double spiral channel at 60 ml/h. (d) The composite image of cells collected at the middle outlet of the double spiral at 60 ml/h. (e) The composite image of cells collected at the inner outlet at 60 ml/h.