Patent ID: 8340371

Claim:
A biodetetector making it possible for an image of a hand or of at least one finger of a user to be recorded, and comprising: a biodetection image formation device, designed for recording said image when a first face of the hand or of the finger is placed substantially within a portion of an image capture plane, characterized in that said portion of image capture plane is situated within a placement volume for the hand or for the finger devoid of any contact surface, and in that the biodetector also comprises: a device for projecting two components of a visual sign, designed so that said sign is recomposed from said components in a locating plane substantially parallel to the image capture plane, said locating plane being situated, when the biodetection image is formed, at a distance from the image capture plane such that the recomposed sign is visible on a second face of the hand or of the finger opposite said first face.