the aspherical lens 16 of the projector 42 shown in fig3 can be moved in conjunction with the projection lens 22 for creating an offset as for the projector 44 shown in fig4 the aspherical lens 16 can be moved in conjunction with the projection lens 22 for creating an offset please refer to fig7 fig7 is a diagram of a projector 50 according to a fifth embodiment of the present invention the projector 50 contains different components than the projector 10 and also contains a plurality of gears 60 70 for adjusting the positions of the concave mirror 18 and he projection lens 22 in fig7 the projector 50 contains a folding mirror 51 for reflecting light beams 30 emitted by a lamp not shown in fig7 to a concave mirror 18 the use of the folding mirror 51 allows the projector 50 to be built with a compact shape for reducing the overall size of the projector 50 the light beams 30 are reflected from the concave mirror 18 to the dmd 20 and are then reflected to the pupil of the projection lens 22 the aspherical lens 16 is not shown in fig7 for clarity but may also be included in the projector 50 the body of the projection lens 22 has adjusting legs 58 that rest against rigid members 52 of the housing of the projector 50 the rigid members 52 keep the projection lens 22 in place while allowing the adjusting legs 58 to move up and down against the.