The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2022
Filed:
Sep. 08, 2021
Omnivision Technologies, Inc., Santa Clara, CA (US);
Paul Wickboldt, Walnut Creek, CA (US);
OmniVision Technologies, Inc., Santa Clara, CA (US);
Abstract
An optical fingerprint sensor with spoof detection using polarization includes a plurality of lenses; an image sensor including a pixel array that includes a plurality of first photodiodes; a line between a center of a light-sensitive surface of each first photodiode and an optical center of each lens forms an optical axis of a plurality of optical axes; at least one apertured baffle-layer positioned between the image sensor and the plurality of lenses and each having a respective plurality of aperture stops, each aperture stop being center-aligned with the optical axis; a plurality of second photodiodes intercalated with the plurality of first photodiodes, wherein each second photodiode is configured to detect light having passed through lens and at least one aperture stop not aligned along optical axis; and at least one polarizing element positioned to polarize electromagnetic energy impinging the plurality of second photodiodes.