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1. (WO2016055741) OPTICAL LENS, LIGHT DIFFUSER AND ALARM DEVICE INCLUDING SAME

Pub. No.:    WO/2016/055741    International Application No.:    PCT/FR2015/052706
Publication Date: Fri Apr 15 01:59:59 CEST 2016 International Filing Date: Fri Oct 09 01:59:59 CEST 2015
IPC: G02B 19/00
F21V 5/08
G02B 13/06
G08B 17/103
Applicants: FINSECUR
Inventors: DI MARCO, Stéphane
PICHARD, Laurent
Title: OPTICAL LENS, LIGHT DIFFUSER AND ALARM DEVICE INCLUDING SAME
Abstract:
The invention relates to an optical lens (10) for diffusing light, having a rear surface (23) intended for being contiguous to a wall (18) and a front surface intended for illuminating a place. The lens is symmetrical relative to a plane and comprises: a portion (20) having a concave rear surface (21) and a convex front surface (27), referred to as upper portion; and a portion (22) having a planar or convex rear surface (28) and a convex front surface (26), referred to as lower portion. In certain embodiments, a line of coplanar points of the concave rear surface (21) in which the planes tangential to the concave rear surface cut the plane of symmetry according to mutually parallel axes is offset on the side of the upper portion, relative to a line of coplanar points of the convex front surface (26, 27) wherein the planes tangential to the convex front surface cut the plane of symmetry according to mutually parallel axes.