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The Cairn microfluorescence detection system is designed with complete flexibility in mind and can be configured to suit a wide range of applications. The optical pathway in all arrangements is broadly similar to that for a dual emission photomultiplier system as shown below. The light path inside the assembly approximates to parallel meaning that the combined image of the sample and the diaphragm blades can be effectively "relayed" to several detection devices simultaneously. This is usually done using dichroic mirrors so that certain wavelengths can be sent selectively to different detectors. In the most obvious case this is used to distribute light between photomultipliers in a dual emission configuration. In all cases where images are being relayed high quality achromatic doublets are fitted to ensure faithful reproduction.
As an alternative to a microscope system we can offer a cuvette holder assembly. This item is fully compatible with our photomultipliers, filter holders and all the fluorescence excitation equipment detailed in the previous section. If you are using a purely cuvette based set-up then please ignore the sections on infrared viewing as this is clearly of no value in such applications.