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WPI Technical Theatre Handbook: Ellipsoidal Reflector Spotlights
 
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Ellipsoidal Reflector Spotlights

Ellipsoidal reflector spotlights (often called ERSs, or Lekos, after a company's ellipsoidal instrument) are among the most complex non-automated lights found in a theatrical lighting setup. Ellipsoidals consist of an incandescent lamp, an elliptical reflector, and one or two plano-convex lenses. There are many types of ellipsoidal instruments, but they all share the common trait of producing a sharp beam that can be focused and shaped. Most employ four shutters that allow the spill of light to be controlled. Ellipsoidals typically have provisions for color frames and gobo projection. Typical uses of ellipsoidals are: acting area lighting, specials, back or side lighting, and pattern projection (discussed a little later in this chapter). Figures 5.6 and 5.7 show typical ERS instruments.

Figure 5.6: Typical non-axial ellipsoidal reflector spotlight.
\begin{figure}\psfig{file=lighting/leko2.eps}\end{figure}

Figure 5.7: An Altman Shakespeare, a modern ellipsoidal reflector spotlight.
\begin{figure}\psfig{file=lighting/shakespr.eps}\end{figure}


next up previous contents index
Next: Automated Instruments Up: Lighting Instruments Previous: Fresnel Spotlights   Contents   Index
Steve Richardson 2000-07-06

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