0 degrees can also be caused by fabrication this angle u03c6 of 0 degrees can be selected to deviate to an extent which is above that caused by fabrication tolerances as is readily evident in fig1 and 15 the particular angle u03b1 is determined by the relative orientation of the particular coating system 7 a or 5 a and the direction of light incidence of the light entering through channel k r b g for white light the geometric conditions according to the invention on light splitters and valves rlv in particular x cubes and light valves rlv as shown qualitatively in fig1 and 15 can be realized through specific formation of the x cube or the light splitter itself namely by tilting their emergent faces corresponding to k r or k b as well as their coating systems 5 a and 7 a and direct application of the valves on the tilted faces in fig1 15 in dashed lines at k r u03c6 k b u03c6 alternatively u2014 and simpler u2014 the u201c tilting u201d is realized through the corresponding positioning of the rlvs and the implementation of illumination or recombination optics with the x cube or light splitter remaining geometrically unchanged a simple realization form results.