at least an imaging device receiving {HEAD ~ the red beam}, the green beam, and the blue beam from the light source and reflecting predetermined parts of the red beam, {TAIL ~ the green beam}, and the blue beam to form an image beam according to image signals 
at least an imaging device receiving { HEAD ~ the red beam } , the green beam , and the blue beam from the light source and reflecting predetermined parts of the red beam , { TAIL ~ the green beam } , and the blue beam to form an image beam according to image signals
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH