NOVELTY - The arrangement has an optical device (3) or collecting lens with an optical axis for focussing light and a scattering lens (2) arranged between the optical device and the surface, whereby the distance between the scattering lens and the surface essentially corresp. to the focal length of the scattering lens, which is movable essentially perpendicularly wrt. the optical axis of the optical device. USE - For illuminating a surface, esp. for coupling light into an optical conductor. ADVANTAGE - The arrangement is of simple design.