As shown in FIG 7, the number of the light focus means 16 is represented by N, which is equal to {HEAD ~ the total light points} generated in {TAIL ~ every revolution} 
generated in
As shown in FIG 7 , the number of the light focus means 16 is represented by N , which is equal to { HEAD ~ the total light points } generated in { TAIL ~ every revolution }
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 HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL