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An illusion based on Pepper's ghost involving projected images has been featured at music concerts (often erroneously marketed as "holographic"). [ 8 ] At the 2006 Grammy Awards , the Pepper's ghost technique was used to project Madonna with the virtual members of the band Gorillaz onto the stage in a "live" performance.
In practice, several more mirrors may be used to direct the beams in the required directions. Normally, transmission holograms [3]: Section 4.3.1 can only be reconstructed using a laser or a quasi-monochromatic source, but a particular type of transmission hologram, known as a rainbow hologram, can be viewed with white light.
Although widely called a "hologram protest" in news reports, [70] no actual holography was involved – it was yet another technologically updated variant of the Pepper's ghost illusion. Holography is distinct from specular holography which is a technique for making three-dimensional images by controlling the motion of specularities on a two ...
The Hering illusion (1861): When two straight and parallel lines are presented in front of radial background (like the spokes of a bicycle), the lines appear as if they were bowed outwards. Hollow-Face illusion: The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face.
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Holographic optical element (HOE) is an optical component (mirror, lens, directional diffuser, etc.) that produces holographic images using principles of diffraction.HOE is most commonly used in transparent displays, 3D imaging, and certain scanning technologies.
Ordinary holograms are three-dimensional images encoded in a two-dimensional surface, such as the hologram on a typical credit card. "This time, the entire universe is encoded," he said.
There are also puzzles, a mirror maze, and a vortex tunnel. Although the project is primarily a tourist attraction, it also serves as a learning centre about optical illusions, holograms, the origins of photography and about Edinburgh itself. Camera Obscura in Edinburgh