PROBLEM TO BE SOLVED: To provide a compact authentication apparatus without the sense of pressure for a user and resistant to external light in imaging of a finger blood vessel pattern with transmission light.SOLUTION: An authentication apparatus comprises a guide groove 108 which positions the finger position, a near infrared light source 114 which is provided on both sides or one side of the guide groove 108 and emits transmission light passing through a finger, an imaging unit (camera) 112 which images the transmission light, light shielding means 116 (a light shielding plate) which restricts the irradiation region of light emitted from the light source, means for measuring the size of the finger, means for controlling the light quantity of the light source on the basis of the measurement result, recording means which records registration imaging patterns of a plurality of fingers, means for collating the imaging pattern of the imaging unit 112 with the registration pattern, and control means which controls difference processes in accordance with the collation result.COPYRIGHT: (C)2015,JPO&INPIT【課題】透過光による指血管パターンの撮像において、ユーザにとって圧迫感がなく、外光に強いコンパクトな認証装置を提供する。【解決手段】指位置を決めるガイド溝108と、ガイド溝108の両側又は片側に設けられ指を通過する透過光を照射する近赤外光源114と、透過光を撮像する撮像部(カメラ)112と、光源から照射された光の照射領域を制限する遮光手段116(遮光板)とを設ける。さらに指の太さを計測する手段と、測定結果をもとに光源の光量を制御する手段と、複数の指の登録撮像パターンを記録する記録手段と、撮像部112の撮像パターンと登録パターンとの照合手段と、照合結果に応じて異なる処理を制御する制御手段と、を設ける。【選択図】図1
