Xenon arc lamp
ISS
The standard lamp utilized in ISS spectrofluorometers is a 300 W ceramic-design high-pressure xenon arc lamp. The design of the lamp is such that the light is entirely emitted in a narrow cone at an angle of about 10° around the optical axis. A condenser lens placed in front of the lamp easily collects almost all the light produced by the lamp and focuses it onto the entrance slit of the excitation monochromator. About 90% of the total light emitted is collected, and that is about 270 W of optical power! The lamp has a lifetime of approximately 2,500 hours and is easily replaced in minutes with the pre-aligned mechanical holder of the lamp housing.
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