FIELD: physics.
SUBSTANCE: apparatus includes at least one light source which emits a light towards a paper sheet; a light-guiding element which receives both reflected light, which is reflected from multiple regions on the paper sheet, and transmitted light which has passed through multiple regions on the paper sheet owing to emission of the light on the paper sheet from the light source, condenses the received light and outputs the condensed light from a light outputting region; an optical processing unit which generates spectral distribution from the condensed light output from the light outputting region of the light-guiding element; and a recognition unit which recognises the paper sheet based on a feature of the spectral distribution generated by the optical processing unit.
EFFECT: simplification of the apparatus and enlarging the recognition regions.
18 cl, 39 dwg
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