CITATION — REFERENCE ENTRY
Ellipsoidal Reflector Spotlight — ControlBooth Wiki
- Key
- controlbooth-wiki-ellipsoidal-reflector-spotlight
- Type
- webpage
- Container
- ControlBooth Wiki
- Publisher
- ControlBooth
Raw CSL JSON
{
"URL": "https://www.controlbooth.com/wiki/Ellipsoidal-Reflector-Spotlight",
"type": "webpage",
"title": "Ellipsoidal Reflector Spotlight",
"accessed": {
"date-parts": [
[
2026,
10,
6
]
]
},
"publisher": "ControlBooth",
"container-title": "ControlBooth Wiki"
}
Claims
-
An ellipsoidal reflector spotlight places the lamp at one focus of an elliptical mirror so that light is reflected through the other focus, where a gate with four framing shutters, an iris or gobos shape the beam. LekoLight, from the surnames of Joseph Levy and Edward Kook of Century Lighting, was a trademark in 1932; ETC introduced the Source Four in 1992; modern units are classed by beam angle (36, 26, 19, 10 and 5 degrees).
"By placing the lamp at one focus of an elliptically shaped mirror, all light leaving that lamp will be reflected through the other focus."
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