OPTICAL FINGERPRINT ACQUISITION APPARATUS USING A PRISM

摘要

An optical formula fingerprint capturing device using a prism is provided to improve the quality of the image sensor by removing unwanted beam of beams irradiated to the image sensor and to install the image sensor at inclined state. A first holding surface(12) is formed in order to be extended in one end of the input side. A second holding surface(14) is formed in order to be extended in one end of the contact surface. A pentagon prism(10) is scattered in the ridge part of the finger if beam irradiated to the input surface is irradiated as the contact surface. An illumination source(20) is installed at the input side of the pentagon prism and is generated beam by the input side. An imaging lens is installed in order to investigate the beam irradiated from the output side.