fake fingerprint detection is possible optical fingerprint input device

摘要

PURPOSE: An optical fingerprint input apparatus capable of detecting a fake fingerprint is provided to discriminate a bio fingerprint from a fake fingerprint only by analyzing characteristics of fingerprint images. CONSTITUTION: A prism(110) forms a reflection side at a fingerprint input window touched with the fingerprint. A light source(120) radiates the light to the reflection side through the prism. A lens(130) receives the light reflected by the reflecting side and forms an optical image. A photographing unit(140) converts the optical image into electric signals, processes the electric signals and acquires the image.