Patent ID: 6956608
Filing Date: 2005-10-18
Classification: G06K

Abstract:
1. A device for creating an image of a fingerprint pattern on an image sensor, the device comprising: an optical plate including: an illuminating tool that illuminates the finger field to create imaging light rays relating to the fingerprint pattern; and an imaging lens to receive the imaging light rays reflected from the array of microreflectors to create the fingerprint pattern image at a location external to the optical plate, the imaging lens including an aperture stop that defines an aperture light beam of the reflected imaging light rays forming the image of the fingerprint pattern; in which the microreflectors are inclined to the base surface so that an area of a projection of the microreflectors on the base surface taken along a path of the imaging light rays reflected at the surface of the microreflectors and passing through the aperture stop exceeds an area of a projection of the microreflectors on the base surface taken along a path of the reflected imaging light rays incident to the surface of the microreflectors.