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