Thus, {HEAD ~ a signal} proportional to the total amount of light received by the photo detecting elements 6a and 6b is supplied to {TAIL ~ the light intensity control circuit D} 
is supplied to
Thus , { HEAD ~ a signal } proportional to the total amount of light received by the photo detecting elements 6a and 6b is supplied to { TAIL ~ the light intensity control circuit D }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL