PROJECT XENON LAMP BULB MOVIE THEATRE PROJECTION 1000W:



The box says Project Xenon Lamp Shanghai Bulb Factory No. 3 1 KW (equal to 1000 watts). The bulbs measure 7.5" in length and is about 5" in diameter around the middle. The ends are threaded and all writing on the box and bulbs is foreign.

Xenon short-arc lamps are point light sources providing high luminance and colour temperature. They emit a continuous spectrum of light, ranging from ultraviolet through visible to infrared.

Conventional xenon short-arc lamps are inadequate light sources for precision photometry, since their light emissions are unstable due to arc point shift and fluctuation. Solving the problems of arc point shift and fluctuation is essential in order to use xenon short-arc lamps in photometric applications.

These super-quiet xenon lamps have completely solved these problems by using a highly durable cathode. This cathode exhibits virtually no shift and minimal fluctuation of the arc point for the lifetime of the lamp. Our super-quiet xenon lamps deliver unprecedented long service life.

Xenon short-arc lamps were invented in the 1940s in Germany and introduced in 1951 by Osram. First launched in the 2 kW size (XBO2001), these lamps saw a wide acceptance in movie projection where it advantageously replaced the older carbon arc lamps. The white, continuous light generated with this arc is of daylight quality but plagued by a rather low lumen efficiency.

Today, all movie projectors in theaters employ these lamps with a rating ranging from 900 watts up to 12 kW. When used in Omnimax projection systems, the power can be as high as 15 kW in a single lamp. Lamps may be water-cooled lamps. In those used in IMAX projectors, the electrode bodies are made from solid Invar and tipped with thoriated tungsten. In (continuous wave pumped) lasers the lamp is inserted into a fixed lamp jacket and the water flows between the jacket and the lamp.

An O-ring seals off the tube, so that the naked electrodes do not get into contact with the water. In low power applications the electrodes are too cold for efficent electron emission and are not cooled, in high power applications an additional water cooling circuit for each electrode is necessary. To save costs, the water circuits are often not separated and the water needs to be highly deionized, which in turn lets the quartz or some laser mediums dissolve into the water. Theoretically the water can be pressurized to disburden the hot quartz, practically it only alleviates the effect of lamp breakage.