PROBLEM TO BE SOLVED: To provide a personal authentication device, personal authentication system, and operational device for executing personal authentication capable of detecting a position and shape of a finger even in a situation where a contour of the finger is not captured in a photographed image.SOLUTION: A blood vessel image photographing device comprises: a plurality of light sources 60 arranged in the lateral direction on a lateral side of an aperture 20 light amount control means for radiating light from the plurality of light sources 60 at different timings and a photographing unit 4 for photographing respective images on the basis of the respective light from the plurality of light sources 60, where part of a finger presentation region includes a tip presentation region in which the tip side of a finger is presented and a root presentation region in which the root side of the finger is presented, and a direction from the tip presentation region side to the root presentation region side is defined as a longitudinal direction. The blood vessel image photographing device detects a contour position of the presented finger in the finger presentation region on the basis of respective luminosity values of the plurality of images.COPYRIGHT: (C)2015,JPO&INPIT【課題】撮像画像内に指輪郭が映らない状況でも、指の位置や形状を検出できる個人認証装置、個人認証システム、個人認証を実行する演算装置を提供する。【解決手段】指提示領域の一部は、指の先端側を提示させる先端提示領域と、指の根元側を提示させる根元提示領域であって、前記先端指示領域側から前記根元提示領域側へ向かう方向を縦方向と定義した場合、複数の光源60は、前記開口部20の側方に、横方向に配列され、光量制御手段は、前記複数の光源60からの光を、タイミングを変えて照射させ、撮像部4は、前記複数の光源60からの夫々の光に基づいて、画像を夫々撮影し、前記複数の画像の夫々の輝度値に基づいて、前記指提示領域における、提示された指の輪郭位置を検出する血管画像撮影装置。【選択図】図1
