ALLSHENG INSTRUMENTS

An advantage of the 'microscope spectrometer' is its ability to use microscope apertures to precisely control the area of sample analysis. Flat capillaries can be used for analyzing small liquid samples, up to about 10 micro-liters in volume. Quartz optics can be used for studying samples in the ultraviolet (UV) range down to wavelengths of about 200nm. Samples that emit fluorescence or delayed fluorescence (phosphorescence) when exposed to UV light, can be quantitatively investigated using a variety of excitation and barrier filters. A variety of observations can be made on samples of interest by using different illumination sources such as halogen, xenon, deuterium and mercury illuminators. Plane polarized light can also be used for studying birefringent samples.

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