A lens 10 comprises a first surface 12 and a second surface 14. The first surface 12 is provided with a plurality of horizontal, linear Fresnel lenses 16 and the second surface 14 is provided with a plurality of horizontal pillow optics 18. In the lens 10 the horizontal, linear fresnel lenses 16 of the...http://www.google.fr/patents/US20050024887?utm_source=gb-gplus-shareBrevet US20050024887 - Single lens for LED signal light
Numéro de demande: 10/879,953 Numéro de publication: US 2005/0024887 A1 Date de dépôt: 29 juin 2004 Brevet délivré: US7484871 ( Date de délivrance 3 févr. 2009)
