| 摘要 |
The invention relates to a biometric sensor configured to acquire at least one image of an object (5) to be authenticated as part of the human body, said object being placed in an acquisition position (7) in an acquisition field (6) of said sensor, comprising: a first light source (1) configured to emit light in order to illuminate the object (5); and an imager (3) configured to acquire, in the acquisition field (6), at least one image of the object to be authenticated placed in the acquisition position (7); characterised in that the sensor comprises at least one second light source (2) configured to emit light into the acquisition field (6) of the sensor in order to illuminate the object (5) to be authenticated placed in the acquisition position (7), said second light source (2) having, from the acquisition position (7) an apparent size smaller than half the apparent size of the first light source (1). |
