DISPOSITIF D'ACQUISITION D'IMAGES, DISPOSITIF DE MANIPULATION DE FEUILLES, DISPOSITIF DE MANIPULATION DE BILLETS DE BANQUE ET PROCÉDÉ D'ACQUISITION D'IMAGES

摘要

The present invention provides an image acquisition device, a sheet handling device, a banknote handling device, and an image acquisition method enabling acquisition of an image from which a feature of a sheet is detectable in an opaque portion and an image from which a feature of the sheet is detectable in a transparent portion. The image acquisition device includes a light receiving unit and an image generating unit. The light receiving unit receives a first transmitted light generated by transmission of a first emitted light having a first quantity of light through a sheet to output a first image signal and receives a second transmitted light generated by transmission of a second emitted light having a second quantity of light through the sheet to output a second image signal. The image generating unit generates a first transmission image from the first image signal and generates a second transmission image from the second image signal. The second quantity of light is set to be smaller than the first quantity of light.