lower substrate as described above the position controller 220 shown in fig2 may control the positions of an upper substrate 310 or the lower substrate 340 so that one among the plurality of regions a f is positioned under and faces an observation object 370 according to the control signal again referring to fig3 a local electric field 380 formed by the metal nanostructures 320 and 330 overlaps the observation object 370 positioned on the upper substrate 310 and the phosphor included in the observation object 370 may emit the light by the local electric field since the lower substrate 340 or the upper substrate 310 may be moved in the x direction or the y direction i e the transverse direction or the longitudinal direction by a position controller the position of the lower substrate 340 or the upper substrate 310 may be controlled so that the local electric field may overlap a region of the observation object 370 that has not overlapped the local electric field at an initial position of the lower substrate 340 and the upper substrate 310 that is the scanning and image acquisition for the entire region of the observation object 370 are possible by moving at least one of the lower substrate 340 and the upper substrate 310 in the x direction by moving the lower substrate 340 or the upper substrate 310 in the x direction an image of a specific region of the observation object 370 may be obtained by using the various metal nanostructures 320 and 330 for the specific region of the observation object 370 for example by moving the lower substrate 340 shown in fig3 in the right side or moving the upper substrate.