This instrument is a stress measurement device that automatically detects the retardation and the slow axis direction of transparent objects which displays birefringence phenomenon under polarizing light. By inputting sample thickness and phoelastic constant in advance , stress vaule( Mpa) will display automatically.
Objects of Polariscope
glass container , glass vial , water glass
industrial new material glass , optical new material glass
optical lens ,crystal , quartz
glass wafer , glass tube , laboratory glassware
float glass plate, automotive glass
resin plate , resin film , mold injection resin products
Measuring principle
When light travels through the polarizer, it becomes circular polarized light. When a stressed sample is placed, there is an optical retardation between the slow axis and fast axis . Thus the outgoing light becomes elliptical polarized light. By rotating the analyzer , the rotating angle of the polarized light which is affected by the presence of internal stress can be detected precisely. By applying the rotating angle to a formula, stress value in the sample will be calculated.
During one measurement, this full-automatic Polariscope can take images at a specialized angle, and simultaneously obtain the stress value and slow axis direction of all sample areas in the viewing field and output the 3D stress distribution.
Application
Glass Inspection
