A method, comprising: emitting two or more beams (3, 4) of light with a first intensity, each of the two or more beams (3, 4) of light being polarized and having a majority polarization state and a minority polarization state; applying a respective polarization pattern on the majority polarization state of each of the two or more beams (3, 4) of light, wherein applying of the respective polarization pattern on the majority polarization state of each of the two or more beams of light comprises splitting each of the two or more beams of light into two split beams each corresponding to a majority polarization state or a minority polarization state, respectively spatially stacking the split beam of each of the two or more beams of light corresponding to the majority polarization state to provide a first beam of light corresponding to the majority polarization state]; spatially stacking the split beam of each of the two or more beams of light corresponding to the minority polarization state to provide a second beam of light corresponding to the minority polarization state]; applying a majority polarization pattern on the first beam of light;]; and applying a minority polarization pattern on the second beam of light;]; and combining the two or more beams of light to provide a single beam of light with a second intensity greater than the first intensity. emitting two or more beams (3, 4) of light with a first intensity, each of the two or more beams (3, 4) of light being polarized and having a majority polarization state and a minority polarization state; applying a respective polarization pattern on the majority polarization state of each of the two or more beams (3, 4) of light, wherein applying of the respective polarization pattern on the majority polarization state of each of the two or more beams of light comprises splitting each of the two or more beams of light into two split beams each corresponding to a majority polarization state or a minority polarization state, respectively spatially stacking the split beam of each of the two or more beams of light corresponding to the majority polarization state to provide a first beam of light corresponding to the majority polarization state]; spatially stacking the split beam of each of the two or more beams of light corresponding to the minority polarization state to provide a second beam of light corresponding to the minority polarization state]; applying a majority polarization pattern on the first beam of light;]; and applying a minority polarization pattern on the second beam of light;]; and splitting each of the two or more beams of light into two split beams each corresponding to a majority polarization state or a minority polarization state, respectively spatially stacking the split beam of each of the two or more beams of light corresponding to the majority polarization state to provide a first beam of light corresponding to the majority polarization state]; spatially stacking the split beam of each of the two or more beams of light corresponding to the minority polarization state to provide a second beam of light corresponding to the minority polarization state]; applying a majority polarization pattern on the first beam of light;]; and applying a minority polarization pattern on the second beam of light;]; and combining the two or more beams of light to provide a single beam of light with a second intensity greater than the first intensity.