state for case 1 and the b state for case 2 case 1 is indicated by solid line 520 and case 2 is indicated by dashed line 522 fig5 c shows the results for case 3 and 4 during which the compensator cell is in its a state and the slm is switched between the b state for case 3 and the a state for case 4 case 3 is represented by solid line 524 and case 4 is represented by dashed line 526 cases 1 4 correspond to cases 1 4 for the systems described above in the background and cases 1 4 described above for fig4 as clearly shown by fig5 b and 5c system 500 produces identical results that is a bright pixel for case 1 and 3 as indicated by lines 520 and 524 respectively it also produces identical results for cases 2 and 4 as indicated by lines 522 and 526 respectively this configuration also produces very good results over the entire wavelength range from 400 nm to 700 nm in fact as illustrated by lines 522 and 526 this configuration provides substantially uniform blockage of the entire range of wavelengths of the light that is directed into the spatial light modulator also in both cases.