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:
Oct. 18, 2022
Filed:
Apr. 23, 2020
Idemia Identity & Security France, Courbevoie, FR;
Laurent Trouboul, Courbevoie, FR;
IDEMIA IDENTITY & SECURITY FRANCE, Courbevoie, FR;
Abstract
The invention relates to a papillary print sensor comprising an acquisition surface () extending over a length L, a light source () configured to emit a light pulse, a sheet () adapted to propagate light rays by reflection on the first face () and the second face (), which defines a critical angle (θ), and an imager (), wherein the thickness (e) of the sheet is less than a thickness e=L/×tan(θ), such that a first part of the light rays () is propagated without reflection on the acquisition surface () while a second part of the light rays () is reflected towards said acquisition surface () after reflection on the second face (), and the imager () is configured to acquire a first image during the reception of the first part of the light rays and a second image during the reception of the second part of the light rays.