Patent ID: 7920728

Claim:
A fingerprint recognition apparatus, comprising: a light source for generating a monochromatic light; an optical component having a first surface and a second surface, configured to receive the monochromatic light entering the optical component through the first surface and exiting from the second surface; a transparent member having a first, a second and a third optical surfaces, wherein the second surface of the optical component adjoins to the first optical surface and the second optical surface comprises a platen area for receiving a fingerprint pressed thereon; and an imaging device disposed outside the third optical surface for transferring an optical image signal to an electrical image signal; wherein the transparent member is configured to receive the monochromatic light through the optical component adjacent to the first optical surface, whereby the monochromatic light forms a plurality of interference fringes on the platen area of the second optical surface, the platen area for reflecting an optical image signal of the interference fringes to exit the transparent member from the third optical surface; and wherein the imaging device is configured to receive the optical image signal of the interference fringes.