Recent Developments in Planetarium Projector Technology
In recent years, planetariums — or dome theaters—have broadened their offerings to include wide-screen or "wraparound" films, fulldome video, and laser shows that combine music with laser-drawn patterns. The newest generation of planetariums such as Evans & Sutherland's Digistar 3, Global Immersion's Fidelity or Sky-Skan's DigitalSky, offer a fully digital projection system, in which a single large projector with a fish eye lens, or a system of digital video or laser video projectors around the edge of the dome, are used to create any scene provided to it from a computer. This gives the operator tremendous flexibility in showing not only the modern night sky as visible from Earth, but any other image they wish (including the night sky as visible from points far distant in space and time).
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