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 the blue beam to form {HEAD ~ an image beam} according to {TAIL ~ image signals} 
according to
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 the blue beam to form { HEAD ~ an image beam } according to { TAIL ~ 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 OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL