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:
Aug. 18, 2009
Filed:
Jun. 22, 2005
Matthieu Rouget, Maisons Laffitte, FR;
Laurent Lambert, Paris, FR;
Jean-christophe Fondeur, Levallois, FR;
Matthieu Rouget, Maisons Laffitte, FR;
Laurent Lambert, Paris, FR;
Jean-Christophe Fondeur, Levallois, FR;
Sagem Securite, Paris, FR;
Abstract
An optical device for biometric sensing by contact, comprising: an optical element () having a face () constituting a surface for apposition of a body part from which a biometric characteristic is to be sensed; a radiation source () for illuminating the face () of the optical element; and sensor means () for picking up the radiation coming from the face (); the face () is coated in a thin layer defining a pattern and made of a material such that in association with the material constituting the optical element, the layer is transparent in the presence of radiation emitted by the radiation source () when a body part is placed on the face () and is significantly less transparent in the presence of external parasitic radiation () that is inclined relative to the face (); whereby the image received by the sensor means can be distinguished depending on whether it is real or latent.