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Arc Light Sources :
Cairn xenon, mercury, and mixed-gas arc light sources offer ultra-high stability, high intensity illumination. The extreme point intensity and broad spectrum make them particularly suitable for fluorescence microscopy, but the modular design and wide range of couplings ensures that they can be equally effective for other purposes.
Available in two basic configurations, the original Classic and the higher output Optosource, both models are configured to produce high intensity focussed light for coupling either to the input slit of a monochromator, or directly into a light guide. Derivations of the basic design include versions with parabolic reflectors for producing a collimated output beam and auxiliary condenser lens optics to aid uniformity. A recent introduction is a variable power option, complimenting the ultra-high stability of the original design with the flexibility of two user defined power settings and real time switching between these two levels.
Applications :
- Fluorescence Microscopy
- Photometry and Imaging
- Photoactivation
- Solar emulation
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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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