An optical arrangement comprising a light guide (101) having a light-entry portion (103) with a light-entry surface (105), a tapering portion (107) with a light reflecting surface, and a light-exit surface (109). The light-entry portion (103) is arranged to guide light from the light-entry surface (105) in a first direction (x) towards the light reflecting surface (H I), the light reflecting surface being arranged in relation to the first direction (x) so that incident light from the light-entry portion (103) is reflected towards the light-exit surface (109). A light transmitting layer (113) is adapted to transmit light diffusively and arranged to cover at least a portion of the light-entry edge surface (105) of the light guide (101). The arrangement is e.g. suitable for use in a LED based luminaire and allows for efficiency and forming of a light beam able to fulfill glare requirements. The arrangement may advantageously be used in a downlighting application.
申请公布号
WO2008126023(A3)
申请公布日期
2008.12.11
申请号
WO2008IB51355
申请日期
2008.04.10
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;IJZERMAN, WILLEM, L.;VISSENBERG, MICHEL, C., J., M.;VAN DER TEMPEL, LEENDERT;SABOU, FLORIAN, C.
发明人
IJZERMAN, WILLEM, L.;VISSENBERG, MICHEL, C., J., M.;VAN DER TEMPEL, LEENDERT;SABOU, FLORIAN, C.