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I found this hologram on a book.

Apart from the usual rainbow colors, it sported a convex mirror effect on it.

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Here, you can see my phone's reflection in the tiny circles.

It would be interesting to know how they make mirror like reflections on a plane flat holographic sticker?

Maybe we could use these holographic mirrors as a substitute for the ordinary spherical mirrors which are difficult to manufacture and handle, too?

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Those circular regions are actually Fresnel reflectors consisting of thin concentric grooves whose faces are tilted as if formed from a parabolic mirror sliced into thin rings and "accordioned" down onto a surface. They can be made holographically, diamond ruled, or made using a microlithographic process.

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