Polarization sensitive eye authentication system
AssigneeMeta Platforms Technologies, LLC
InventorsMantas Zurauskas, Mohamed Tarek Ahmed El-Haddad
Life of this patent
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Abstract
A system for authentication of a user includes a light source to transmit polarized light, a polarization sensor, and processing logic. The system may cause the light source to illuminate an eye of the user with the polarized light, cause the polarization sensor to take an image of the eye to collect polarization characteristics particular to the eye when illuminated with the polarized light, and compare the polarization characteristics with previously collected polarization characteristics to authenticate the user.
Claims20
A system for authentication of a user, comprising:
- a light source to transmit polarized light;
- a polarization sensor;
- and
- processing logic coupled to the light source and the polarization sensor, wherein the processing logic is to perform operations including to:
- cause the light source to illuminate an eye of the user with the polarized light;
- cause the polarization sensor to take an image of the eye of the user to collect an angle of linear polarization and a degree of linear polarization particular to the eye when illuminated with the polarized light, the angle of linear polarization and degree of linear polarization based on a tissue of the eye of the user that is uniquely birefringent;
- and
- compare the angle of linear polarization and the degree of linear polarization with a previously collected angle of linear polarization and degree of linear polarization associated with the eye, the angle of linear polarization and degree of linear polarization based on the tissue of the eye of the user that is uniquely birefringent to authenticate the user and confirm a liveness of the eye.
A method for authentication of a user, comprising:
- causing a light source to illuminate an eye of the user with polarized light having a polarized state;
- causing a polarization sensor to take an image of the eye to collect an angle of linear polarization and a degree of linear polarization particular to the eye when illuminated with the polarized light, the angle of linear polarization and degree of linear polarization based on a tissue of the eye of the user that is uniquely birefringent;
- and
- comparing the angle of linear polarization and the degree of linear polarization collected from the image of the eye with a previously collected angle of linear polarization and degree of linear polarization associated with the eye, the angle of linear polarization and degree of linear polarization based on the tissue of the eye of the user that is uniquely birefringent taken while the eye was illuminated under a similar polarization state, to authenticate the user and confirm a liveness of the eye.
A system for authentication of a user, comprising:
- a light source to illuminate an eye of the user with polarized light;
- and
- a polarization sensor to detect light received back from the eye of the user, and wherein an angle of linear polarization and a degree of linear polarization of the light detected received back from the eye, the angle of linear polarization and degree of linear polarization based on a tissue of the eye of the user that is uniquely birefringent, is used for identifying the user by comparing a previously collected angle of linear polarization and degree of linear polarization, the angle of linear polarization and degree of linear polarization based on the tissue of the eye of the user that is uniquely birefringent to confirm that the eye is live.
Dependencies are inferred from the claim text.