Suzhou Ptc Optical Instrument Co., Ltd.

Measuring Principle The internal stress of glass and plastic products has a birefringent characteristic. In other words, if there is stress inside of these types of products, light from he polarized lamp will be divided into different units, which produce optical interference phenomenon(ripple patterns) in turn. Under white-light lamp, you can see aubergine ripples, which is caused by the presence of stress. From the observation of colored patterns, you can see stress distribution directly, then evaluate and improve the annealing process. The inspection of plastic molds is more complex as the colored patterns cased by stress is irregular. A similar situation may occur with glass products, which is called stress stretching. For example, a qualified mold will have a large amount of stress released by tension. The role of full-wave plate : When testing glass samples without the full-wave plate, usually only black or gray shadow patterns can be seen. The full-wave plate increases or decreases the full wavelength of a phase difference, thereby forming a colored pattern, which is easier to analyze.

The handheld Polariscope ( Ref.PSV-202-DL ) has been designed to cover a wide range of strain viewing applications. It can be applied to the quality control inspection of glass and plastics components and may be employed as a vertical or horizontal viewing instrument. Different from common bench type Polariscope , this handheld Polariscope adopt seperating design , that means the analyzer and polarizer are movable . In this way , the net weight is almost reduced to half . This lightweight design make it more convenient to carry . The working space available within the unit enables a wide variety of components to be accommodated for hand held examination under polarizing� light. �  Detecting object 1. any transparent glass products such as : fish tank , mobile phone cover, lighting tube, solar glass ,automobile glass,sapphire, glass container , glass handicraft 2. any transparent plastic samples such as : PET preform, plastic bottle , cosmetic bottle , beverage bottle, plastic tray, plastic film 3. Crystaline material Specifications Optical path difference of full-wave plate : 560nm  Viewing field illuminating area : 400mm*400mm Analyzer on the top ) : diameter 200mm Overall size:500mm*500mm*90mm Voltage: 220VAC  Light source: White LED lamp

The surface stress meter ( Ref. ASM-200-FAP measures surface stress of tempered glass and the depth of the stress layer according to photoelastic technology by letting light spread along the glass surface. This machine is equipped with a PC, which can reduce measurement errors caused by the operators . Moreover, it is more convenient for the management of testing data. Thickness Gauge is optional to improve the measurement efficiency. Features Advanced non-destructive testing method : Photoelastic analysis Refractormeter determination of qualified or unqualified (OK/NG ) according to operators setting( in continuous testing mode ) quantity accumulation of OK and NG samples automatically offer master piece to achieve self-calibration at any time Automated testing to ensure detecting accuracy and stability Data saved by PC to facilitate data analysis, providing guide for quality control Optional single testing mode to save testing time Recommended manual testing mode when samples are not in good tempered condition Led Lamp with 10,000 hours serving time automatic dripping device and automatic suction device controlled by specific software has been integrated into the body to save installation space Specifications Stress Measurement Range (Mpa) 0-1000 Stress Measurement Accuracy (Mpa) �±20 Depth Measurement Range (m) 5-50 Depth Measurement Accuracy (m) ±0.2m Measurement Object chemically tempered glass Min detecting objects (mm) 12*7 Light source Special LED Wave length (nm) 590±10 IR of Prism 1.72 PC special OS Analysis software each designed for Corning Gorilla Glass 3 , Glass 4 Power AC220V 3A Air Source (Mpa) 1(clean air) Measuring Head size 300600 250mm Measuring Head Weight (Kg) 14

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