Patent ID: 8335353

Claim:
A biometrics authentication system comprising: a light source; a detection section where a living body is placed; a light guide section totally reflecting light emitted from the light source to guide the light to the living body; a diffraction section diffracting light propagating through the light guide section, the diffraction section including a plurality of groove sections with each groove section having a depth, the depths of the groove sections are adjusted so that a diffraction efficiency of the diffraction section changes with respect to the distance from the light source; an image pickup lens section condensing light from the living body and including a micro lens array having a plurality of micro lenses, the micro lens array operative to change its refractive characteristics; an image pickup device obtaining image pickup data based on the light condensed by the image pickup lens section; and an authentication section performing authentication of the living body based on the image pickup data obtained in the image pickup device.