Mirascope

The Mirascope uses twin parabolic mirrors to project a real, three-dimensional image that floats untouchably above the aperture.

This optical device utilizes two identical concave parabolic mirrors in a clamshell configuration: the focal point of each mirror is positioned at the vertex of the other. When a small object (e.g., a 4 cm plastic frog) is placed at the bottom mirror's focus, light rays reflect twice—first off the top mirror, then off the bottom—to converge precisely at the top mirror's central opening. This double-reflection process creates a real, laterally inverted image that appears solid and tangible in the air, yet fingers pass right through it (a classic demonstration of geometric optics, not a true laser-generated hologram).

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