{HEAD ~ Objective lens driving system} in a optical pick up and method of modulating the resonance frequency of {TAIL ~ its lens holder} 
{ HEAD ~ Objective lens driving system } in a optical pick up and method of modulating the resonance frequency of { TAIL ~ its lens holder }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL