Figure 2 (IMAGE)

Pohang University of Science & Technology (POSTECH)

Figure 2

Caption

Illustration of vectorial holographic color prints. With the naked eye, the device displays a two-colored QR code image but with laser illumination, the encrypted vectorial hologram image is projected in space. This holographic image with a unique polarization state can be selectively turned on or off via a liquid crystal analyzer, which can make only certain encrypted numbers visible.

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POSTECH

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