SYSTEME OPTIQUE DE LECTURE DE MOCRORELIEFS, NOTAMMENT DES EMPREINTES DIGITALES

SYSTEME OPTIQUE DE LECTURE DE MOCRORELIEFS, NOTAMMENT DES EMPREINTES DIGITALES

First and second light pointlike sources in a sensor device are positioned to illuminate an upper inside surface of a transparent layer so that light is totally reflected onto an image sensor. The image sensor is positioned so that light reflected from a utilized portion of the upper surface falls o...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: JURY CATHERINE, MAINGUET JEAN FRANCOIS, RAMEL ROMAIN
Format: Patent
Sprache:fre
Schlagworte:
CALCULATING
COMPUTING
COUNTING
PHYSICS
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Beschreibung
Zusammenfassung:First and second light pointlike sources in a sensor device are positioned to illuminate an upper inside surface of a transparent layer so that light is totally reflected onto an image sensor. The image sensor is positioned so that light reflected from a utilized portion of the upper surface falls on the surface of the image sensor. The image sensor dimensions can be such that the image sensor receives light totally reflected from a first portion of the utilized portion in response light from the first light source, and receives light totally reflected from a second portion of the utilized portion in response light from the second light source.