PROBLEM TO BE SOLVED: To provide a biological feature input device and a biological feature input method which can obtain even an image of a dry finger and a wet finger.SOLUTION: A biological feature input device 10 includes: an irradiation system 20 for making light incident onto an inside of a finger FG from surrounding of the finger FG； a fiber plate 30 having on its upper portion an incidence plane 30a on which a finger print portion FP of the finger FG is placed and through which transmitted light irradiated from the finger print portion FP among transmitted light from the finger FG is made incident； a prism body 40 positioned in a lower portion of the fiber plage 30 and having a reflective coating surface 40a； and an image capturing system 50 for generating a reduced image of a finger print from the transmitted light reflected by the reflective coating surface 40a and for capturing an image of a finger print.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】乾燥指や湿潤指でも画像を取得できる生体特徴入力装置及び生体特徴入力方法を提供する。【解決手段】生体特徴入力装置１０は、指ＦＧの周囲から指ＦＧの中に向かって光を入射させる照射系２０と、指ＦＧの指紋部ＦＰが置かれ、指ＦＧの透過光のうち、指紋部ＦＰから出射される透過光を取り込む入射面３０ａを上部に有するファイバプレート３０と、ファイバプレート３０の下部に位置し、反射コーティング面４０ａを有するプリズム体４０と、反射コーティング面４０ａで反射された透過光から、縮小された指紋画像を生成し、指紋画像を撮像する撮像系５０と、を備える。【選択図】図２
