PURPOSE: To enable selection of desired and undesired cells efficiently in a short time by irradiating an undesired cell dyed with a fluorescent pigment with a concentrated light beam with a wavelength high in an absorption ratio of the fluorescent pigment.
CONSTITUTION: When a sample 5 wherein an undesired cell dyed by a fluorescent pigment is mixed with a desired cell that will not be dyed or will be only dyed slightly by the fluorescent as it is pigment is irradiated with a concentrated light beam 2 with a wavelength high in absorption ratio with respect to absorption characteristic of the fluorescent pigment, the desired cells allows the transmission of most of energy of the concentrated light beam 2 through transparent ones. On the other hand, the undesired cells are damaged and exterminated as the fluorescent pigment dyeing them absorbs the energy of the concentrated light beam 2.
IWAKIRI YACHIYO
MURAKAMI SEI
ISOBE KENICHI
ISOBE KENICHI
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