The quality assurance in PET bottles requires many tests and one of the test is performed using polarization light equipment. Many of the defects found in PET container preforms can be detected by using the Polarization Light. Preforms viewed in polarized light exhibit a colored birefringence pattern. The birefringence is a result of the polymer flow lines (molecular orientation strain) produced during the injection molding process.

With angle adjusting design, operator can view the preform as their most convenient angle, and the upgraded wider viewing area and sample platform means more preforms could be placed and viewed at the same time.

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