The object of the present invention is to provide a forgery proof and copying proof diffraction structure which by {HEAD ~ virtue} of {TAIL ~ a high spatial frequency} has a clearly recognizable pattern 
of
The object of the present invention is to provide a forgery proof and copying proof diffraction structure which by { HEAD ~ virtue } of { TAIL ~ a high spatial frequency } has a clearly recognizable pattern
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH