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Polarising microscopes are used to observe the polarisation characteristics of materials. Typical specimens are geological, crystals, asbestos, fibres and polymers.
This type of microscope typically has an upper polariser (called an ‘Analyser’) in the head of the microscope and a lower polariser (called a ‘Polariser’) which is mounted beneath the specimen stage and above the illumination. The polarisers are rotatable and are often positioned so that they are ‘crossed’ at 90 degrees to each other. With no specimen in place this will produce a black image (called extinction’).
When a birefingent specimen is placed on the stage, light is differentially refracted, producing an often beautifully coloured image where the colours are proportional to the bi-refractive characteristics of the specimen.
The specimen stage is always round to allow specimens to be rotated by specific degrees allowing the analysis of the materials under observation.
Our products include entry-level hobbyist microscopes, a great range of robust university teaching grade microscopes and top-end research microscopes. There are transmitted (bottom) light, incident (top) light and both dual illuminated versions available. More advanced models have waveplate inserts and Bertrand Lenses for additional analysis such as conoscopy.
GT Vision offer the largest range of polarising microscopes in Europe. This is one of GT Vision’s specialist areas.