| abstract |
A multi-staged lighting device ( 1 ) for generating a polarized multi-colored light beam ( 25 ) is disclosed. The multi-staged lighting device ( 1 ) comprises two or more light concentrators ( 5, 15 ), each light concentrator ( 5, 15 ) having a wavelength converter ( 8, 19 ) configured to convert light entering the light concentrator ( 5, 15 ) to light having a longer wavelength, and at least one polarizing beam splitter ( 10 ) configured to split converted light coupled out from a light concentrator ( 5, 15 ) into two light beams having different polarizations, one of the light beams being transmitted to a different light concentrator ( 5, 15 ) and the other light beam forming a color component of the polarized multi-colored light beam ( 25 ). Light converted by wavelength converters ( 8, 19 ) of different light concentrators ( 5, 15 ) has different wavelengths, and the light concentrators ( 5, 15 ) are arranged in order of increasing wavelength of the converted light, a first light concentrator ( 5 ) being arranged to receive light from at least one light source ( 2, 17 ). A method for generating a polarized multi-colored light beam ( 25 ) is also disclosed. |