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Xenon short-arc lamp: Difference between revisions
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Whenever a new xenon lamp is installed it must be properly aligned on the X, Y and Z axis (horizontal, vertical, axial) to have even illumination and achieve the proper luminance on screen. Poor lamp alignment can result in hot spots of light on screen, damage the reflector, lens, and even the print. A lamp alignment should be performed when a new lamp is installed and periodically thereafter because the position may drift over time. | Whenever a new xenon lamp is installed it must be properly aligned on the X, Y and Z axis (horizontal, vertical, axial) to have even illumination and achieve the proper luminance on screen. Poor lamp alignment can result in hot spots of light on screen, damage the reflector, lens, and even the print. A lamp alignment should be performed when a new lamp is installed and periodically thereafter because the position may drift over time. | ||
Lamp alignment should be done whenever a new lamp is installed. Lamp alignment should also be checked if you see hot spots or shadows on screen or if you discover embossing or burns on prints that you have run. If you are switching between different [[ | Lamp alignment should be done whenever a new lamp is installed. Lamp alignment should also be checked if you see hot spots or shadows on screen or if you discover embossing or burns on prints that you have run. If you are switching between different [[film gauges]] on the same projector, the position of the reflector should be adjusted to achieve the correct [[working distance]] between the focal point of the reflector and the aperture. Most dual format lamphouses have a toggle switch to make this adjustment. | ||
Most lamphouses have a mechanical adjustment to shift the position of the cathode end, while the anode end is supported by a post or yoke with an adjustable height. The height of the anode can usually be set during the initial installation, with only the cathode end being adjusted at every lamp change. If you center the cathode end, it will be apparent if the anode position is incorrect because the lamp will not be straight. | Most lamphouses have a mechanical adjustment to shift the position of the cathode end, while the anode end is supported by a post or yoke with an adjustable height. The height of the anode can usually be set during the initial installation, with only the cathode end being adjusted at every lamp change. If you center the cathode end, it will be apparent if the anode position is incorrect because the lamp will not be straight. | ||
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*Ushio lamps ship in a ballistic shield, with the anode and cathode ends supported by cardboard blocks. To dispose of used lamps, Ushio recommends returning the lamp to its original shield and box and dropping it from a height if three feet.<sup>[4]</sup> | *Ushio lamps ship in a ballistic shield, with the anode and cathode ends supported by cardboard blocks. To dispose of used lamps, Ushio recommends returning the lamp to its original shield and box and dropping it from a height if three feet.<sup>[4]</sup> | ||
In practice, their packaging is secure enough that it can be very difficult to destroy the lamp in this fashion. | *In practice, their packaging is secure enough that it can be very difficult to destroy the lamp in this fashion. | ||
==See Also== | ==See Also== | ||
*[[Lamphouses]] | *[[Lamphouses]] | ||
*[[Carbon | *[[Carbon arc lamp]] | ||
*[[Light sources]] | *[[Light sources]] | ||