PTC China is a national high-tech enterprise specializing in the design and manufacture of glass Surface Stress Meter , Polariscope , automatic Optical Inspection Equipment ( AOI ） and Vision Inspection System .
In the previous manual Senarmont method, the observer needs to determine the brightest point and the darkest point by their eyes, thus operation errors can not be prevented .
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.
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., such as fish tank.
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.