A second reflecting surface of an ellipse group reflecting {HEAD ~ surface} such as a rotated elliptic surface having a first focus located substantially on the light source and having {TAIL ~ a second focus} at a predetermined position 
having
A second reflecting surface of an ellipse group reflecting { HEAD ~ surface } such as a rotated elliptic surface having a first focus located substantially on the light source and having { TAIL ~ a second focus } at a predetermined position
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH