OPTICAL DEVICE FOR A LED ILLUMINATION APPARATUS SHAPING AN ELONGATED ILLUMINATED AREA

摘要

The invention relates to an optical device for imparting an elongate shape to a light beam. The optical device according to the invention is particularly relevant for lighting surfaces which have a great length with respect to their width, such as a road, a street or a motor way. The optical device comprises an entry diopter (3), an exit diopter (4) which comprises a first convergent section (41), a second convergent section (42) and a divergent section (43) bridging said first and second convergent sections, and an internal reflective surface (21) arranged such that at least part of the light entering the optical device (2) by the entry diopter (3) is reflected on the internal reflective surface (21) so as to exit the optical device (2) by the exit diopter (4).