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