Patent ID: 8315511

Claim:
A finger authentication device for authenticating using biological information with respect to a finger of a user, comprising: a base; and an upper case which inclines with an angle from a distal end side to a proximal end side with respect to the base, and is integrally formed with the base, wherein the base includes a finger guide on which the finger is set, an optical system for guiding transmissive light irradiated to penetrate the finger, and an image pick-up unit for picking up an image of a pattern of the light guided by the optical system; wherein the finger guide further comprises a wall with a height to block incidence of ambient light, and a slope portion which is inclined from the wall along an inner portion for stabilizing the finger disposed at both sides of the finger guide; and wherein the inner portion is defined with the angle of the upper case with sufficient space to accommodate the finger of the user, and the upper case includes light sources for irradiating a center tip and both sides of the finger set on the finger guide.