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