Search International and National Patent Collections

1. (WO2016062500) LIGHTING DEVICE COMPRISING PUMP RADIATION SOURCE

Pub. No.:    WO/2016/062500    International Application No.:    PCT/EP2015/072335
Publication Date: Fri Apr 29 01:59:59 CEST 2016 International Filing Date: Wed Sep 30 01:59:59 CEST 2015
IPC: G03B 21/20
G03B 33/08
G02B 26/00
H04N 9/31
Applicants: OSRAM GMBH
Inventors: SCHNARRENBERGER, Martin
AMSBECK, Dirk
MAGG, Norbert
Title: LIGHTING DEVICE COMPRISING PUMP RADIATION SOURCE
Abstract:
The present invention relates to a lighting device (6) comprising a pump radiation source for emitting pump radiation (1), a first phosphor element (7) for converting the pump radiation (1) into a first conversion light (2), a second phosphor element (8) for generating a second conversion light (5), and a coupling-out mirror (15), which is arranged downstream of the first phosphor element (7) in a beam path (12) with at least part of the first conversion light (2), wherein the first conversion light (2) is a broadband conversion light having components (3a, b) in a first spectral range (4a) and a second spectral range (4b), which is different from said first spectral range, wherein the coupling-out mirror (15) arranged in the beam path (12) with at least part of the first conversion light (2) is transmissive only in one of the two spectral ranges (4a, b), but is reflective in the other spectral range, such that, downstream of the coupling-out mirror (15), light having a first spectral component (3a) in the first spectral range (4a) and light having a second spectral component (3b) in the second spectral range (4b) are present in a separated fashion, wherein at least part of the light having the first spectral component (3a) is available at an output (18) of the lighting device (6), and wherein furthermore the second phosphor element (8) is arranged in a beam path (21) with at least part of the light – separated by the coupling-out mirror (15) – having the second spectral component (3b) and, in response to this excitation, emits the second conversion light (5), which can be used jointly with the light having the first spectral component (3a) in order to increase the efficiency.