Portable information terminal device using a single imaging element to perform identity verification

A portable information terminal device comprising:

• a first enclosure and a second enclosure of said portable information terminal device freely openable and closable about a hinge mechanism;
• an imaging element provided within said first enclosure;
• a first window provided on a front surface of said second enclosure for said imaging element and having a keyboard thereon;
• a first lens provided within said first enclosure for said imaging element;
• a second lens, a focal length of which being shorter than that of said first lens, provided within said first enclosure for said imaging element;
• a second window provided on a front surface of said first enclosure, said front surface thereof being opposite to said front surface of said second enclosure, when both of said enclosures being attached to each other;
• and
• a transparent plate, to which a tip of a finger of an user of said portable information terminal device is attached, being positioned on a back surface of said second enclosure so as to oppose to said first window;
• wherein said transparent plate, said first window, said second lens and said imaging element are arranged in one row when said first and second enclosures are contacted to each other to form a closed condition.