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