Lighting device in order to code reader indexes on the letters

摘要

The present invention relates to an illumination device for a reader of indexed codes on letters, permitting reading of these codes B1, B2 when the latter are written in a scanning (analysis) area 11 comprising a surface 31 which may be curved or otherwise. The scanning (analysis) area 11 is created on the letter 4 by a read head 2, equipped with an optical aperture 5 having a first longitudinal axis 12 contained in a first plane which is common with a second longitudinal axis 14 of the scanning (analysis) area 11. The illumination device 1 according to the invention comprises at least one first source of light L1, arranged on one side 15, 15' of the optical aperture 5 and at least one additional source of light LS arranged substantially in the first plane containing the two longitudinal axes 12, 14. IMAGE