By changing {HEAD ~ a voltage} between {TAIL ~ the first voltage application electrode} 13 and the first opposing electrode 17, a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15 
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By changing { HEAD ~ a voltage } between { TAIL ~ the first voltage application electrode } 13 and the first opposing electrode 17 , a phase that converts plane waves into spherical waves is imparted on light that is incident on the first phase changing layer 15
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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 OTH OTH OTH OTH OTH OTH