Method of illuminating a digital representation of an image

摘要

An illumination unit for positioning adjacent a record medium support surface of an analyze scanner on which a record medium to be scanned is positioned in use. The unit comprises a housing with a slot extending at least partially along its length. At least one radiation source is supported within the housing, whereby a beam of radiation passes through the slot. A radiation absorbing surface is provided offset from the radiation source so as to form a background when viewing the slot through the medium support surface in a direction offset to the beam direction.