PROBLEM TO BE SOLVED: To highly precisely detect a living body in a simple constitution in a biometrics authentication apparatus.SOLUTION: This biometrics authentication apparatus is provided with a plurality of light sources 102, 103, 106 and 107 having different wavelengths and illuminating a finger 200, or an authentication object, and light receiving parts 104 and 105 detecting lights transmitting through the finger. This biometrics authentication apparatus determines whether it is a living body or not by finding a transmittance, or a light intensity ratio of the illumination light from the light sources to the detection light detected by the light receiving part and comparing its dimension with a threshold of the preset transmittance.COPYRIGHT: (C)2008,JPO&INPIT【課題】生体認証装置において、簡単な構造で、高精度で短時間に生体検知すること。【解決手段】認証対象となる指200へ、各々異なる波長を有する複数の光源102,103,106,107と、指を透過する光を検出する受光部104,105を設ける。上記光源からの照射光と、上記受光部で検出する検出光との光強度比である透過率を求め、予め設定した透過率の閾値との大小を比較することで、生体か否かを判定する。【選択図】図1
