| 摘要 |
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 multicolored light beam (25) is also disclosed. |
