This device automatically detects the image luminance, thereby finding the darkest point precisely . By inputting sample photoelastic constant and thickness in advance , the stress value will be calculated by the computer . In addition, Sensitive Color method is used to clearly define the direction of stress. 

Features

1. greatly improve the measurement accuracy with the combination of Senarmont, Sensitive Color method and machine vision processing;

2. equipped with a zoom lens for detection of small samples ;

3. measurement can be finished in 10s;

4. save data and images automatically with a laptop

Application

1. measurement of residual stress in various types of glass products ;

2. stress presence and stress distribution in plastic products ;

3. phase difference measurement of optical film ;

4. stress presence in crystalline materials

Detection objects

1. lighting industry , such as light bulbs, light tubes

2. beverage and medical packaging industry, such as drink bottles , Penicillin bottles, ampoule bottles ;

3. household glassware, such as red wine glass , crisper, salad bowl ;

4. other glass products , such as contact lenses, solar glass ,automobile glass;

5. optical crystals, such as calcium fluoride

Instrument parameters