A second embodiment of the present invention is provided for overcoming the above problems of the first embodiment and includes structural components for providing {HEAD ~ a feature} of {TAIL ~ Spot Wobble Defocus} 
of
A second embodiment of the present invention is provided for overcoming the above problems of the first embodiment and includes structural components for providing { HEAD ~ a feature } of { TAIL ~ Spot Wobble Defocus }
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