Patent ID: 7327861

Claim:
An organism authenticating apparatus for recognizing a blood vessel pattern of a finger of a hand by using infrared rays passed through the finger, working in a horizontal direction with the finger pressed against a vertical plane of a U-shaped finger guide composed in a gap of the authentication apparatus, and comprising: a positioner to fix a position of the finger; an infrared ray radiator to radiate infrared rays; an infrared ray image input to input an image of a blood vessel pattern of the finger, said infrared ray image input being placed at an opposite side of said finger with regard to said infrared ray radiator; an organism recognizer to recognize that the organism is live; a processor that processes data that are inputted by said infrared ray image input so that it collates inputted data with image data that are registered in advance; and an output to output the result of processing carried out by said processor, wherein said infrared ray radiator and said infrared ray image input are structured so that a line connecting said infrared ray radiator and said infrared ray image input is horizontally flat and the finger is placed between the input and the radiator, wherein said organism recognizer measures at least one of a temperature, a resistance, or an impedance at a specified frequency of the finger to be recognized in order to recognize the organism by using electrodes or a temperature sensitive element that are attached to said positioner that fixes the position of the finger of the hand, wherein said processor controls commencement of operation of said infrared ray radiator and said infrared ray image input according to the measurement result measured by said organism recognizer, and wherein said infrared ray radiator comprises a plural number of infrared LEDs that are placed in line and are driven by a current at a saturated level such that a luminosity of the LEDs is maximum, and a shielding means that is provided with a predetermined gap width between a camera and the finger to be recognized in order to cut unnecessary rays except infrared rays.