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Xenon short-arc lamp: Difference between revisions
→Lamp Alignment
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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. | ||
[[File:anode-shadow.jpg|right|thumb|450px|Shadow of the anode assembly seen on screen during lamp alignment, once the lens has been removed. ''Photo credit: Katherine Greenleaf'']] | |||
During alignment you will see the following on screen: The shadow of the anode assembly at the end of the lamp is the dark circle, immediately ringed by visible plasma (the electron arc). Surrounding it is the circle of light collected by the [[reflector]], and reflected upon the screen. This area comprises most of what we see, and should appear bright white and essentially even in luminance upon completion of the alignment. | During alignment you will see the following on screen: The shadow of the anode assembly at the end of the lamp is the dark circle, immediately ringed by visible plasma (the electron arc). Surrounding it is the circle of light collected by the [[reflector]], and reflected upon the screen. This area comprises most of what we see, and should appear bright white and essentially even in luminance upon completion of the alignment. | ||