HSM45 Transmitted Light Polariscope

HSM45 Transmitted Light Polariscope

The HSM45 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 polarisation 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 (the optional HSM45D) which supplies monochromatic or white light. Rubber mounting feet enable it to sit firmly onto the light source. The frame can be vertically or horizontally mounted onto the light box.

A variety of specimens are supplied and each one in turn is mounted into the loaded mechanism using quick connect joints. The 250N loading mechanism consists of a loading spring, dial gauge and screwjack for precise loading of the specimens. The loading mechanism can be adjusted to suit the length of the specimen using the quick release knobs supplied. Specimens supplied include bar, overlap beam, crane hook, plate, perforated beam.

The unit comes supplied with specimens, quarter wave plate, polarisation filter, and a comprehensive instruction manual. A 2 year warranty is also offered.

HSM45 Transmitted Light Polariscope
  • 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
  • A full technical instruction manual is supplied, which details full unit operation, experimental technique, example results and relevant theory.
  • 2 year warranty


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