PROBLEM TO BE SOLVED: To detect a faint optic element with high accuracy by a biosensor provided with a light emitting element 24 and a light receiving element 26.SOLUTION: The biosensor includes a board 22 that has optical transparency, the light emitting element 24 that irradiates a subject with a light through the board 22, and the light receiving element 26 that receives the light from the subject through the board 22 and outputs a signal corresponding to the received light. The board 22 has anti-reflectiveness on an opposite surface to the light emitting element 24 and the light receiving element 26. To impart the anti-reflectiveness, the biosensor may have a structure in which an anti-reflection film 30, for example, is stuck on the opposite surface of the board 22.COPYRIGHT: (C)2013,JPO&INPIT【課題】発光素子24と受光素子26とを備える生体センサーにおいて微弱な光成分を精度良く検出する。【解決手段】光透過性を有する基板22と、被験体に対し、基板22を介して光を照射する発光素子24と、被験体からの光を、基板22を介して受光して、当該受光に応じた信号を出力する受光素子26と、を備え、基板22のうち、発光素子24および受光素子26との対向面に反射防止性を持たせる。反射防止性を持たせるために、基板22の対向面には例えば反射防止フィルム30を貼付する構成としても良い。【選択図】図4
