| 摘要 |
Information on the position and displacement of a detection-subject substance T can be presented by adoption an evanescent light illumination technology. An evanescent light beam PE has a property that the intensity thereof abruptly attenuates in accordance with an exponential function with increases in distance Z from a boundary surface S capable of generating the evanescent light beam PE. The detection-subject substance T fixed on the boundary surface S is excited by the evanescent light beam PE having the property described, generating the original fluorescent light beam f of the detection-subject substance T. On the basis of the intensity I of the fluorescent light beam f, information Z on the position of the detection-subject substance T and informationΔz on the displacement of the detection-subject substance T can be acquired. In addition, by making use of the information Z and the informationΔz, it is possible to obtain information on the structure of the detection-subject substance T, its structural change, a base sequence of a nucleic acid chain serving as the detection-subject substance T, the existence/non-existence of substance interactions and the state of progress of the interactions.
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