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Fresnel - Fresnels are typically 8-, 6- or 4-inch, referring to the diameter of the lens. This light is named after Augustin-Jean Fresnel who invented the distinctive Fresnel lens which has a 'stepped' appearan. Used . ce instead of the 'full' or 'smooth' appearance of other lenses. The stepped nature of the lens causes a corresponding pattern of circles of light, so Fresnel lenses are usually 'stippled' on. Used . the flat side. This pattern of small bumps helps to break up the light passing into the lens to smooth out its eventual pattern.

Fresnels use a spherical reflector, with the filament of the bulb ...

Zoom Lens - A mechanical assembly of lens elements with the capability to vary its focal length allowing for a closer or farther view of a subject, without changing perspective. Zoom lenses are often described b. Used . y the ratio of their focal lengths from longest to shortest. A 100mm to 400mm zoom may be described as a 4:1 or 4× zoom.

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Beamage - The beam of light projected from lights as it appears in the air.. Used . . Used . ...

Ballyhoo - A set of programmed moves for automated lights where the lights move randomly within a specific area.. Used . . Used . ...

Analog signal - An analog or analogue signal is any variable signal continuous in both time and amplitude. It differs from a digital signal in that small fluctuations in the signal are meaningful. Analog is usually t. Used . hought of in an electrical context, however mechanical, pneumatic, hydraulic, and other systems may also use analog signals.

The word "analog" implies an analogy between cause an. Used . d effect, voltage in and voltage out, current in and current out, sound in and frequency out.

An analog signal uses some property of the medium to convey the signal's information. For example, an ...