FINGER SENSOR USING POLARIZED LIGHT AND ASSOCIATED METHODS
First Claim
Patent Images
1. A multi-biometric finger sensor comprising:
- an integrated circuit (IC) substrate for receiving a user'"'"'s finger;
an optical source for projecting light of a known polarization angle onto the user'"'"'s finger;
at least one optical sensing pixel on said IC substrate for detecting a relative depolarization angle of the light reflected from the user'"'"'s finger; and
at least one other biometric finger sensing pixel on said IC substrate for sensing at least one other biometric characteristic from the user'"'"'s finger.
2 Assignments
0 Petitions
Accused Products
Abstract
A multi-biometric finger sensor may include an integrated circuit (IC) substrate for receiving a user'"'"'s finger. The multi-biometric finger sensor may also include an optical source for projecting light of a known polarization angle onto the user'"'"'s finger and at least one optical sensing pixel on the IC substrate for detecting a relative depolarization angle of the light reflected from the user'"'"'s finger. The multi-biometric finger sensor may also include at least one other biometric finger sensing pixel on the IC substrate for sensing at least one other biometric characteristic from the user'"'"'s finger.
-
Citations
29 Claims
-
1. A multi-biometric finger sensor comprising:
-
an integrated circuit (IC) substrate for receiving a user'"'"'s finger; an optical source for projecting light of a known polarization angle onto the user'"'"'s finger; at least one optical sensing pixel on said IC substrate for detecting a relative depolarization angle of the light reflected from the user'"'"'s finger; and at least one other biometric finger sensing pixel on said IC substrate for sensing at least one other biometric characteristic from the user'"'"'s finger. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A multi-biometric finger sensor comprising:
-
an integrated circuit (IC) substrate for receiving a user'"'"'s finger; an optical source on said IC substrate for projecting light of a known polarization angle onto the user'"'"'s finger; at least one optical sensing pixel on said IC substrate for detecting a relative depolarization angle of the light reflected from the user'"'"'s finger; at least one polarization filter in an optical path between said optical source and said at least one optical sensing pixel; at least one other biometric finger sensing pixel on said IC substrate for sensing at least one other biometric characteristic from the user'"'"'s finger; and a processor coupled to said at least one optical sensing pixel and said at least one other biometric finger sensing pixel and cooperating therewith to reduce spoofing. - View Dependent Claims (17, 18, 19, 20, 21)
-
-
22. A method for multi-biometric finger sensing comprising:
-
receiving the user'"'"'s finger adjacent an integrated circuit (IC) substrate; projecting light on the user'"'"'s finger from an optical source; sensing a depolarization angle of reflected light from the user'"'"'s finger by using at least one optical sensing pixel on the IC substrate; and sensing another biometric characteristic of the user'"'"'s finger by using at least one other biometric sensing pixel on the IC substrate. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
-
Specification