PROBLEM TO BE SOLVED: To provide an information terminal device for improving convenience.SOLUTION: The information terminal device switches into a blood vessel imaging mode among the blood vessel imaging mode imaging a blood vessel and an object imaging mode imaging the object other than the blood vessel, radiates the near infrared beams, and collates the information to be compared with the vessel to be imaged by means of the imaging element 14c, in response to that a slide plate 31, which movably holds a polarization plate 27 having polarization axes in a direction perpendicular to a direction of radiation in which near infrared beams are radiated, is moved and to that the polarization plate 27 is arranged on a light path of an imaging element 14c.COPYRIGHT: (C)2011,JPO&INPIT【課題】利便性を向上し得る情報端末装置を提供する。【解決手段】近赤外光が照射される照射方向に対して直交する方向に偏光軸を有する偏光板27を移動自在に保持するスライド板31が移動され、撮像素子14cの光路上に偏光板27が配されることに応じて、血管を撮像する血管撮像モードと上記血管以外の被写体を撮像する被写体撮像モードとのうちの血管撮像モードに切り替え、近赤外光を照射して撮像素子14cにより撮像される血管と比較すべき情報とを照合する。【選択図】図6
