These are only three of several different approaches to hologram authentication, but they have in common the use of the diffraction grating as the vehicle for authentication--respectively measuring its period and orientation, its diffraction spectrum
or its physical characteristics.
electron microscope (SEM) and corresponding corrosive X-ray diffraction spectrum
(XRD) after immersing for 6 months in carbonation and chloride salt composite pore solution is shown in Figure 3(c).
Caption: FIGURE 4: The normalized diffraction spectrum
of DVG and EDVG.
The X-ray diffraction spectrum of neat PE consists of strong (110) and (200) diffraction peaks indicating the orthorhombic unit cell .
A significant observation from the X-ray diffraction spectrums is the evolution of the (002) graphitic nanoparticle peak in the MWCNT and GNP nanocomposites at 26[degrees], indicating the diffraction of the filler particles inside the nanocomposite.
We can see that the main phase is still the hexagonal wurtzite structure for ZnO (JCPDS 36-1451), but it can be clearly observed that there is several weak diffraction peaks except ZnO main phase in the X-ray diffraction spectrum
labeled as "a" of sol composite film.
(1990), Diffraction spectrum
and investigation techniques, Ed.
Figure 3b shows the X-ray powder diffraction spectrum
of the gold mercaptide/polystyrene blend (20% by weight of mercaptide) annealed at 250[degrees]C.
Figure 4 shows that XRD diffraction spectrum of specimens corresponds to electron beam treatment.
XRD diffraction spectrum of specimens was shown in Figure 3(b) with different Cr layer thickness and pulses number under 13 kV voltage.
Typical X-ray diffraction spectrums
at selected pressure is shown in Figure 2.