In {TAIL ~ another aspect} of {HEAD ~ the invention}, a spot wobble scheme may be employed alone in a static defocussing system, without dependence upon the video signal content 
In { TAIL ~ another aspect } of { HEAD ~ the invention } , a spot wobble scheme may be employed alone in a static defocussing system , without dependence upon the video signal content
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH