Figure 3
From: High-resolution 1D moirés as counterfeit security features
Fabricated base and revealing layers. (a) Optical image of fabricated Au base layers on glass substrate for a circular 1D moiré moving along spirals. (b) Magnified microscope image of this base layer corresponding to the dashed square area in Figure 3(a). (c) A more magnified microscope image of the base layer corresponding to the dashed square in Figure 3(b). (d) An optical picture of a bent lenticular array fabricated over a flexible substrate and SEM images of the lenticular arrays fabricated from (e) a commercial master, (f) a positive photoresist master fabricated in our laboratory and (g) a magnified image of the lenses shown in (f).
