Patent ID: 7600898
Filing Date: 2009-10-13
Classification: G07D

Abstract:
1. An illuminating device for linearly illuminating a flat object such as a bank note, comprising at least one or a plurality of linearly disposed light sources, a mirror arrangement serving as a reflector, which extends in parallel to the linearly disposed light sources, with an optical axis (OA) perpendicular thereto, said mirror arrangement comprising plane mirrors, including a first mirror having a structure which images the light source to form two linear images in parallel to the minor arrangement which are disposed mirror-symmetrically to the optical axis (OA), and two second mirrors imaging the two linear images to form a linear illumination in parallel to the mirror arrangement on the optical axis (OA) or in the proximity of the optical axis (OA); wherein the first mirror is formed as a single flat plane mirror and the structure that images the light source is formed in segments into which a surface of the first plane mirror is divided; and wherein at least one first segment is formed as a peak and valley configuration having a first height ratio, and at least one second segment is formed as a peak and valley configuration having a second height ratio, different from the first height ratio.