polariscope
1 Per Piece
1 Piece (MOQ)
‘TBG’ Polariscope is used to view the internal material stresses and material flow characteristics of PET preforms and containers. This is ideal for laboratory use and at-the-line preform and bottle inspection. Defects in preform can be easily detected by using this equipment. When a preform is held parallel to viewing field colour pattern is seen known as isochromatic fringe. This indicates magnitude of the stresses introduced during moulding process. When a perform is held 45 deg to viewing field a coloured pattern known as isoclinic is seen, this indicates direction of stresses.
Polariscope Computerized
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Polariscope is an optical device and used for the defect identification in PET preforms. Preforms develop internal defects due to external strain. These defects might create weak points when blown moulded into bottle. To avoid this, the preforms are tested prior mass production. The device has an incident light and polaroid lenses. The incident light passes completely through the test medium without any refraction. As a light encounter a defect, it changes its path doubly and create different patterns of light. Due to polaroid nature of lenses, the birefringence of light forms. This birefringence creates different patterns depending upon the type of the defect. The pattern can be matched with the defect chart to identify the defect. The sample is tested at two different angles, 45° and 90°. The strain viewer can be used for PET preforms and glasses also. It is equipped with two types of incident light Monochromatic and Sodium. The device can be connected with the computer for defect identification and report generation. The Polariscope computerized model is supplied complete with: Viewing Area: 260 * 240 mm Display: Pictorial through Inbuilt Software Power: 220V, Single phase, 50 Hz Lights: CFL Light Sodium Light Standard Template Measuring Angle: 45º and 90º
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polariscope
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Presto offers Polariscope, a highly efficient strain viewer that helps the manufacturers in testing the quality and transparency of the products so that best quality assurance could be ensured to the customers. The working of the Presto’s Polariscope is based on the principle that any change in refractive index is due to different strain distribution and this leads to lower transparency of the material. The testing instrument offered by Polariscope comes in variety of sizes and specifications according to the requirements of the clients Photoelasticity is a major phenomenon that occurs in PET, Preforms and Glass products. Photoelasticty means the change in the refractive index of the material when there is non-uniform strain distribution throughout the material. Photoelasticity can be a great problem for the manufacturers of PET and glass products as this is great flaw in the quality of the products. Presto offers two models of Polariscope that are Polariscope Dx and Polariscope computerized. The instruments are manufactured with best quality of materials to provide an extended service life and accurate testing procedures. The testing instrument is provided protection from corrosion and rust with Zinc and chrome plating and has been given a smooth and attractive finish in grey and blue color. The instrument is also provided with an instruction manuals and a conformance certificate that can be traced to any of the NABL approved laboratories.
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