| 摘要 |
PROBLEM TO BE SOLVED: To efficiently determine particle information by detecting light being emitted from each particle at the first flow region of a sample liquid flow, picking up the particle image of each particle at a second flow region, obtaining a first feature parameter from the detected light, and obtaining a second feature parameter from the particle image that has been picked up. SOLUTION: Beams L1 and L2 from a continuous emission laser light source 1 and a pulse light source 2 are applied to a square-shaped sheath flow cell 3 so that they orthogonally cross each other. Sample liquid containing a particle is guided to the sheath flow cell 3, thus forming a liquid flow that is narrowed thinly. A continuous emission laser beam is applied to a sample liquid flow via a condenser lens 4, is collected by a condensation lens 5, and is received by a photodiode 7. An image pickup control circuit supplies an emission trigger signal to a pulse light source 2, and a data-processing device calculates a second feature parameter from the projection image of each particle and creates a two-dimensional scattergram according to the first and second feature parameters for displaying on a display.
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