Described herein is a barcode-reading system for a mobile device that may include an optic system with a reflective surface for folding a field of view of a camera of the mobile device towards a target area positioned at a top side of the mobile device, a reflective surface for folding a field of illumination of a white light source of the mobile device towards the target area, and a target-generating mechanism for narrowing the field of illumination of the white light source along a first direction such that the field of illumination of the white light source has a divergence angle in the first direction that is approximately the same as a divergence angle of the field of view of the camera in the first direction.