Patent ID: 6750955
Filing Date: 2004-06-15
Classification: G06K

Abstract:
An optical fingerprint sensor, comprising:a diffuser for receiving the plurality of light rays and collimating the plurality of light rays to the prism; a prism for receiving a plurality of light rays, the prism reflecting the light rays when a finger surface is in contact with the upper surface of the prism; a first mirror for receiving the light rays and for reflecting the plurality of light rays from the prism; a collimating lens, coupled between the prism and the first mirror, for receiving the plurality of light rays from the prism and for focusing the plurality of light rays to the first mirror; a second mirror for receiving the plurality of light rays from the first mirror and for reflecting the plurality of light rays; and an imaging lens for receiving the plurality of light rays from the second mirror and focusing the plurality of light rays onto a sensor.