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| Terms Infusion - v. |
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| Lamp Flicker |
| As the lamp ages, the shape of two anodes may changes from two points to a flattened state. When this occurs, the arc jumps across the gap from varying points. This is seen as image flicker. Turning the Lamp Conditioning feature ON will pulse the lamp and gradually “condition” the two anodes back to two points. Lamp Conditioning may take seconds, minutes or hours to reach full effectiveness. NOTE: Lamp flicker can occur at any time in the lamps life. The length of time, over which flicker may occur varies considerably and unpredictably. This behavior is inherent in UHP lamps. |
| Line of Best Viewing |
| When light from a projector is incident on a screen, the light reflects from the screen such that the angle of reflection equals the angle of incidence. The Line of Best Viewing is along the line of reflection. |
| Linearity |
| The reproduction of the horizontal and vertical size of characters and/or shapes over the entire screen. |
| LiteLOC™ |
| A Christie software feature where samples of output light from a projector trigger automatic adjustments in the lamp ballast power in order to maintain a constant light output over time. Also known as brightness tracking. |
| Loopthrough |
The method of feeding a series of high impedance inputs from a single video source with a coaxial transmission line in such a manner that the line is terminated with its characteristic impedance at the last input on the line.
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| Lumen (ANSI) |
| The unit of measure for the amount of visible light emitted by a light source. |
| Luminance |
| The signal representing the measurable intensity (comparable to brightness) of an electronic image when the image is represented as separate chrominance and luminance. Luminance also expresses the light intensity of a diffuse source as a function of its area; measured in lumens or candles per square foot (1 lumen per square foot = 1 footlambert). SMPTE RP 98 calls for a luminance of 12 to 22 footlamberts for theatre screens. See: Footlambert. |
| Lux |
| The amount of visible light per square meter incident on a surface. 1 lux = 1 lumen/square meter = 0.093 foot-candles |
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