| abstract |
A light-emitting device ( 100 ) is provided, comprising four light sources ( 101, 102, 103, 104 ) and a collimating element ( 105 ) for collimating and mixing the light from the light sources. The light-collimating element comprises three V-shaped profile surfaces ( 110, 120, 130 ) arranged with their edges ( 115, 125, 135 ) towards the light sources. The V-shaped profile surfaces are provided with dichroic filters that transmits light from the light sources that they are arranged in front of, and reflects light from the remaining light sources. Such a device is capable of collimating and mixing the light from the four light sources, such that essentially the same degree of collimation is achieved for all four light sources. |