Patent ID: 7991205

Claim:
A biometrics device comprising: a supporting mechanism which movably supports a finger; a light source which emits near infrared rays to the finger moving on the supporting mechanism; first and second reflective light sources arranged in a substantially horizontal direction of which the first reflective light source irradiates visible light to a right side of the finger moving on the supporting mechanism and the second reflective light source irradiates visible light to a left side of the finger moving on the supporting mechanism; an imaging unit which images a plurality of venous images from the finger, a plurality of first surface images obtained from the right side of the finger and a plurality of second surface images obtained from the left side of the finger, while alternately causing the first and second reflective light sources and the light source of near infrared rays to emit light; an image processing unit programmed to: compute travel distances of characteristic points of the plurality of first and second surface images obtained, and process the plurality of venous images into a single image pattern; and a luminous energy adjusting unit which adjusts the luminous energy of the first and second reflective light sources arranged in a substantially horizontal direction, wherein, after the luminous energy outputs of the first and second reflective light sources have been stabilized, the imaging unit picks up and acquires an image of the finger for authentication processing.