EP 2005060 A2 20081224 - DEVICE FOR PRODUCING ISOTROPIC AMBIENT LIGHT
Title (en)
DEVICE FOR PRODUCING ISOTROPIC AMBIENT LIGHT
Title (de)
VORRICHTUNG ZUR ERZEUGUNG VON ISOTROPEM UMGEBUNGSLICHT
Title (fr)
DISPOSITIF DE PRODUCTION DE LUMIERE AMBIANTE ISOTROPE
Publication
Application
Priority
- FR 2007000473 W 20070320
- FR 0602448 A 20060321
- FR 0602447 A 20060321
Abstract (en)
[origin: WO2007107650A2] The invention concerns a device (1) for producing isotropic ambient light, comprising: at least one extended light source (Si) including several punctual light sources (101) spaced apart along two orthogonal axes (X, Y); a waveguide (11, 11') for propagating, by total reflections in a propagating direction (Z) perpendicular to the plane (X, Y), the light beams produced by the punctual light sources; and means (12) for scattering the light in the waveguide output (11, 11'). The dimension (L) of the waveguide (11, 11') along said propagating direction (Z) is further sufficient to allow the light intensity curve (I<SUB>i</SUB>,<SUB>x</SUB>) which is detected, for each light source (S<SUB>i</SUB>), in the waveguide output along one of the two axes (X or Y) and in a detecting range corresponding to the waveguide output section along said axis (X or Y), to have a maximum value (lmax) and a minimum value (lmin) which satisfy the following criterion of quasi-uniformity (Imax-lmoy) < 0.3.lmoy et (Imoy-lmin) = 0.3.lmoy, Imoy being the average value of the light intensity levels (I<SUB>I,x</SUB>) detected along said axis (X or Y).
IPC 8 full level
F21V 8/00 (2006.01); G02B 5/02 (2006.01); G02B 6/00 (2006.01); G02B 27/00 (2006.01)
CPC (source: EP US)
G02B 6/0068 (2013.01 - EP US); G02B 27/0994 (2013.01 - EP US); F21S 10/02 (2013.01 - EP US)
Citation (search report)
See references of WO 2007107650A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007107650 A2 20070927; WO 2007107650 A3 20071108; EP 2005060 A2 20081224; US 2009154154 A1 20090618; US 8011800 B2 20110906
DOCDB simple family (application)
FR 2007000473 W 20070320; EP 07731163 A 20070320; US 22540607 A 20070320