Title:
LIGHT GUIDE ELEMENT FOR MODIFYING THE LIGHT DISTRIBUTION PATTERN OF A LIGHT SOURCE
Document Type and Number:
WIPO Patent Application WO/2014/044926
Kind Code:
A3
Abstract:
A light guide element (201) for modifying a light distribution pattern of a light source (202) is presented. The light source radiates first light beams to a first quarter-space (203) and second light beams to a second quarter-space (204), where the first and second quarter-spaces are defined by mutually perpendicular spatial planes (xy, xz) and one (xy) of the spatial planes constitutes a planar boundary between the first and second quarter-spaces. The light guide element comprises transparent material (207) on a route of the first light beams for modifying the light distribution pattern of the first light beams and a reflective surface (208) for reflecting at least a part of the second light beams to the first quarter-space. A surface of solid material on a route of the second light beams comprises grooves (213) for spreading the light distribution pattern of the second light beams in the direction ( ±y) of the section line between the spatial planes.
Inventors:
LAAKKIO OLLI-PEKKA (FI)
Application Number:
PCT/FI2014/050008
Publication Date:
May 30, 2014
Filing Date:
January 07, 2014
Export Citation:
Assignee:
LEDIL OY (FI)
International Classes:
F21V5/08; G02B19/00; F21V13/04; G02B17/08
Foreign References:
| US20110096533A1 | 2011-04-28 | |||
| GB2180051A | 1987-03-18 |
Attorney, Agent or Firm:
BEGGREN OY AB (P.O. Box 16, Helsinki, FI)
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