No. 09/800,470 to Glukhovsky et al., but may also be any other suitable type of light sources, including but not limited to, infrared light sources, monochromatic light sources, band limited light sources known in the art or disclosed hereinabove. [0050] It is noted that while in accordance with one embodiment of the present invention the light sources 63A, 63B, 63C and 63D are shown to be identic