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