Product number: HSM60

The HSM60 polariscope is a bench top mounted frame which allows the study of stress patterns and photoelasticity resulting from geometrical changes in loaded mechanical models.

The frame has integral slots along its lengths into which can fit quarter wave plates and polarisation filters. The frame has both polarisation filters and quarter wave plates mounted in to a rotational mechanism that allows independent angular adjustment and hence vary the colourisation seen by the user.

A lightbox (supplied as standard) provides monochromatic or white light to pass through the specimens when loaded. The light box is mounted vertically to suit the frame. 

Specimens are made from CR39 photoelastic material which is a highly specialised reactive plastic polymer commonly used in lens manufacture. A variety of specimens can be optionally supplied and each one in turn is mounted into the loaded mechanism using quick connect knobs. 

The loading mechanism consists of a loading spring, dial gauge and screw-jack for precise loading of the specimens.  This mechanism allows the user to calculate the load applied to the specimen in tension. The loading mechanism can be adjusted to suit the length of the specimen using the quick release knobs supplied. 250N loading is achievable from the loading mechanism. Standard specimens supplied include rod and square plate. 

Specifications and resources

Bench top unit for teaching of Photoelastic principles
To be supplied with quarter wave plates and polarisation filters
Wave plates and filters to easily slide in frame assembly and rotate independently
Fine tuning loading mechanism using loading spring, dial gauge and screw-jack
A variety of mechanical specimens supplied as optional extras
To load the specimen in tension & compression