| 摘要 |
<p>The invention relates to an optical reading device (1) for optical information (7) on a carrier, in particular on a banknote, comprising an illumination unit (5) for producing a light beam coming from the information (7), an optical system (3) having at least two focal planes (40, 41, 42) at a distance from each other, which optical system divides the light beam into at least two sub-beams, at least one image sensor (4, 4a), on which each of the sub-beams produces images (8, 8a, 8b) of the information (7) of different sharpness, and an image processing system, which is connected to the at least one image sensor (4, 4a) and which determines an image (8, 8a, 8b) having the highest sharpness.</p> |
