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Matthieu Rouget

Jean-Christophe Fondeur

Laurent Lambert

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.

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Maisons Laffitte, France

Matthieu Rouget