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PTC® Polariscope
PTC® Polariscope

Six Inch Bench Polariscope #243

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Six Inch Bench Polariscope
Part Number: 243
Availability: In Stock.
Made in the USA
The Polariscope is a crucial tool for identifying strain patterns that develop during fabrication and manufacturing. It permits immediate determination of strains in most transparent materials. It is valuable in production or as a laboratory tool wherever glass is fabricated, welded, or bent. Check the liquid in glass thermometers for stress and strains. 

As polarized light travels through strained glass or plastic, it undergoes a retardation proportional to the amount of stress. A Polariscope is an instrument that can be used to view this retardation qualitatively. 

Tech Note: When a photoelastic material is subjected to a load and illuminated with polarized light from the measurement instrumentation (called a reflection polariscope), patterns of color appear which are directly proportional to the stresses and strains within the material. The sequence of colors observed as stress increases is: black (zero stress), yellow, red, blue-green, yellow, red, blue-green, yellow, red, etc. The transition lines seen between the red and green bands are known as "fringes." The stresses in the material increase proportionally as the number of fringes increases. Closely spaced fringes mean a steeper stress gradient, and uniform color represents a uniformly stressed area. Hence, the overall stress distribution can easily be studied by observing the numerical order and spacing of the fringes. 

Documentation PDF: 243 Polariscope

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