Features
Tesca Transmitted Light Polariscope is a bench top mounted frame which allows  the study of stress patterns and photoelasticity resulting from geometrical changes in loaded  mechanical models. Photoelastic analysis is achieved by passing light through the mechanical stress  models while a tensile load is applied. The frame has the Transmitted Light Polariscope filter and  quarter wave plate mounted to rotational frames. These frames allow the rotational angle of the plates  and filters to be adjusted and hence vary the colourisation seen by the user. The frame can sits in  front of a light box which supplies monochromatic or white light. Rubber mounting feet enable it to sit  firmly onto the light source. ransmitted Light Polariscope can be vertically or horizontally mounted  onto the light box.

Specifications
To be bench top unit for teaching of photoelastic principles 
To be used with white light or monochromatic light source 
To be supplied with quarter wave plates and polarisation filters, and light box 
Wave plates and filters to be easily mounted 
A variety of mechanical specimens supplied 
Adjustable loading mechanism 
To have fine tuning loading mechanism using loading spring, dial gauge and screwjack 
Wave plates and filters can be rotated through varying angles to vary colourisation

Experiments

1. Photoelastic analysis of standard mechanical models 
2. Analysis of Crane hook under tensile load 
3. Tensile loading of beams, perforated beams, plates, overlap element 
4. Variation of stress colourisation 
5. Rotational position of wave plate and filters