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Teaching & Learning Aids


Model 080 Teaching Polariscope System

Photoelastic methods of stress analysis provide a complete "picture" of the stress distributions in a structure. As a result, they have become increasingly important elements in the design of products. The 080 Series Teaching Polariscope System will enable you to give your students a firm foundation in this valuable technology and will add new understanding to courses in design and strength of materials.

The Model 081 Teaching Polariscope is a complete working polariscope which can be used to graphically demonstrate and teach the principles of photoelasticity and its application to stress analysis. Because it has all the elements of a bench-mounted laboratory instrument, the 081 is also an excellent device for teaching the theory and operation of a polariscope.

The 081 can be easily carried to the classroom and quickly set up for use. It is designed to be placed on an overhead projector and allows students to observe the different measuring operations necessary to determine the stress directions and magnitudes of the projected photoelastic pattern. Quantitative measurements are made through the use of a transparent dial which surrounds the projected pattern.

The Polariscope consists of a sturdy anodized metal frame, two plane polarizing filters, two removable quarter-wave filters, and the transparent numbered dial. A mechanical drive system is provided for rotating all four filters simultaneously. The filters are laminated in glass for excellent light transmission as well as durability.

A full line of accessories is also available to extend the usefulness of the polariscope in teaching and research. The recommended 080 System would include a straining frame with mechanical force dial indicator, support stage for stress-frozen models, uniform-field digital compensator, monochromator, and a set of educational models.

For additional information on the 080 Series Teaching Polariscope System, ask for Bulletin 306 from the Vishay Measurements Group office in your area.