In some embodiments systems as described herein include optical elements that fold light beams 12 such that light beams 12 converge on image plane 13 at angle α (as shown for example in Fig. 1) while SLMs 15 and/or light sources 14 are not aligned with the parts of light beams 12 that converge on image plane 13. An example of such a structure is illustrated in Fig. 4.