wherein an amount of defocusing performed by said means for defocusing and an adjustment of said gain by said means for adjusting are dependent on {HEAD ~ a content} of {TAIL ~ said composite signal} 
of
wherein an amount of defocusing performed by said means for defocusing and an adjustment of said gain by said means for adjusting are dependent on { HEAD ~ a content } of { TAIL ~ said composite signal }
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 HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL