AXIVA OPTICA Cylindrical Cells with PTFE lid all sides polished

Polarimetric Measurement for some applications, e.g. in polarimetri and for circular dichroism measurements, it is important to check that the cells are free of strain birefringence. The effect of possible strain birefringence is determined in the following way: In a polarimeter the rotation of the plane of polarisation of the incident linearly polarised light is measured. The measurement is carried out in a circular area of approximately 3 mm diameter whose centre coincides with the centre height of the empty cell. Because of the measuring geometry, only cells with an aperture diameter or aperture width of greater than 3 mm can be measured in this way.