| 摘要 |
The present invention relates to a light irradiation apparatus and the like which can reduce background light noise from a plurality of wells provided on a microplate. The light irradiation apparatus comprises a microplate (20), a light guiding member (60), and a light source apparatus (62). The light guiding member (60) includes a plurality of light emitting units provided on a main surface (61a) in correspondence with the plurality of wells (21). Each light emitting unit includes depressions (61e) each having an opening on the main surface (61a). Measurement light from the light source apparatus (62) is inputted from a side surface (61b), refracted and reflected at the side surface of each depression (61e), and then outputted from the opening of each depression (61e). According to such a configuration, it becomes possible to significantly reduce the measurement light component which is inputted perpendicular to the back surface (23), among the measurement light inputted from the back surface (23). Therefore, background light noise from each well (21) which occurs in response to irradiation of the measurement light is effectively reduced.
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