the projector 18 preferably the radial offset dr is limited to relatively increasing concentrations of light within certain of the aperture angles within the range required for illuminating the object field 30 another alternative multiplexed beam generator 90 is shown in fig5 here a plurality of effective light sources 94 remain aligned with axes 98 of associated beam shaping optics 96 within a common housing 100 but the axes 98 of the beam shaping optics 96 are inclined to the objective optical axis 42 through an angular offset d u03b8 shown measured with respect to parallel axes 102 for concentrating light within aperture angles prone to reaching the object field 30 through the front relay lens 24 the inclinations of the axes 98 are preferably taken within axial planes that include the objective axis 42 similar to the preceding embodiment mirror symmetry is preferably provided between the effective sources 94 and associated beam shaping optics 96 on opposite sides of the objective stop 26 for balancing illumination across the object field 30 also similar to the preceding embodiment the shapes and sizes of the effective light sources 94 are preferably limited in relation to the beam shaping optics 96 for generating light beams through the range of aperture angles required for illuminating the object field 30 as imaged by the objective 12 or the projector 18 the angular offset d u03b8 is limited to relatively increasing concentrations of light within certain of the aperture angles within the range required for illuminating the object field 30 various combinations of offsetting the effective.