Biometric identity verifiers and methods
For use in verifying the identity of a user, an identity verifier comprising an optical fingerprint sensor coupled to an ID (identification) card reader. In one embodiment of the present invention, the optical fingerprint sensor includes a light source on a PCB assembly, a diffuser that receives light from the light source, a right angle prism that receives light from the diffuser, a collimating lens that receives light from the prism, a first mirror that receives light from the collimating lens, a second mirror that receives light from the first mirror, a third mirror that receives light from the second mirror, an imaging lens that receives light from the third mirror, and an image sensor on the same PCB assembly as the light source that receives light from the imaging lens. In one embodiment of the present invention, an ID (identification) card reader reads an ID card that contains biometric information about the user, and compares the biometric information on the card with the fingerprint of the user captured by the optical fingerprint sensor captured by the optical fingerprint sensor.
1. A system, comprising:
an optical fingerprint sensor, comprising:
a light source;
a prism for receiving a plurality of light rays from said light source, 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 plurality of light rays and for reflecting the plurality of light rays;
a second mirror for receiving the plurality of light rays from the first mirror and for reflecting the plurality of light rays;
a third mirror for receiving the plurality of light rays from the second mirror and for reflecting the plurality of light rays;
an imaging lens for receiving the plurality of light rays from the third mirror and focusing the plurality of light rays onto a sensor;
wherein said light source and said sensor are located on the same printed circuit board; and
an ID (identification) card reader, coupled to the optical fingerprint sensor, for reading the information from an ID card,
wherein comparison of the biometric information on the ID card with that obtained from the user is the only necessary means of verification of the user's identity.
2. The system of claim 1 , further comprising a diffuser for receiving the plurality of light rays and uniformly distributing the plurality of light rays to the prism.
3. The system of claim 1 , further comprising a collimating lens, coupled between the prism and the first mirror, for receiving the plurality of light rays from the prism and for converging the plurality of light rays to the first mirror.
4. An apparatus, comprising:
an optical fingerprint sensor for detecting a fingerprint of an individual comprising;
a light source; and
a sensor;
three or more mirrors for folding a plurality of light rays from said light source to said sensor;
wherein said light source and said sensor are located on the same printed circuit board, and
an ID (identification) card reader for reading information from an ID card, the ID card including biometric information about the individual, wherein the biometric information obtained by the ID card reader is compared to the fingerprint of the individual obtained by the optical fingerprint sensor,
wherein comparison of the biometric information on the ID card with that obtained from the user is the only necessary means of verification of the user's identity.
5. The apparatus of claim 4 , wherein the apparatus comprises a hand-held device.
6. The apparatus of claim 4 , wherein the apparatus comprises a PDA (personal digital assistant) device.
7. The apparatus of claim 4 , wherein the apparatus comprises a computer.
8. A method for verifying identification, comprising:
detecting a fingerprint of an individual; and
reading information from an ID card comprising a biometric information on the individual; and
verifying identification of the individual by comparing the fingemrint of the individual to the biometric information of the individual;
wherein comparison of the biometric information on the ID card with that obtained from the user is the only necessary means of verification of the user's identity;
wherein the detecting step comprises:
emitting a plurality of light rays from a light source;
reflecting a plurality of light rays at a top surface of a prism, comprising:
if a finger surface is touching the top surface, absorbing the plurality of light rays that impinges the top surface of the prism by the finger surface, which destroys internal reflection condition; and
if a finger surface is not touching the top surface, reflecting the plurality of light rays by the internal reflection of the prism;
collimating the plurality of light rays;
folding the plurality of light rays through three or more mirrors; and
detecting the plurality of light rays by a sensor;
wherein an image of said fingerprint is formed on said sensor located on the same PCB as the light source.
9. The method for imaging a fingerprint of claim 8 , prior to the step of reflecting a plurality of light rays at the top surface of prism, further comprising receiving the plurality of light rays by a diffuser.
10. The method for imaging a fingerprint of claim 9 after the folding step, further comprising focusing the plurality of light rays through an imaging lens.