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Polarization stress meter PSV-590 equipment use and detection method

  • Source: Unknown
  • Date: 2022-11-27
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Scope of application:
1. It is suitable for detection lamps and other products with complex structures.
2. Detect high-density plastic products, such as contact lenses.
3. Detect optical crystals, such as calcium fluoride.
 
Equipment specification:
1. Polarization stress meter light field brightness ≥ 120cd/m2 (590nm orange light 50w)
2. The degree of polarization at any point of the polarizing element of the polarizing stress meter is greater than or equal to 99%
3. The polarization field of the stress meter is 200 * 200mm
4. Polarization stress meter structure: 1/4 wave plate and full wave plate (wavelength: 565nm) are respectively placed between the polarizer and polarizer. The slow axis of the 1/4 wave plate is 90 degrees to the polarization plane of the polarizer, and the slow axis of the full wave plate is 45 degrees to the polarization plane of the polarizer
5. Measuring device with rotation angle on the top of the polarizer (scale value is 1 degree, maximum measuring range is 180 degrees)
 
Test method:
Sensitive Color:
In the light sensitive method, when the dial is at zero, the whole field of vision is orange. This color is divided into light sensitive colors. When the sample is put in, the part with stress is light white or grayish black, which is different from the background color. And determine that the stress property is pressure or tension. The part of the sample without stress is orange, which is the same as the background color.
 
SenarmonMethod compensation method:
Senarmont compensation method can be used for quantitative stress analysis and detection. Turn on the power supply. When the sample dial is at zero, the entire field of vision is dark brown. When the sample is put in, do not rotate the polarimeter, and observe the most bright spot, which is the point of maximum stress. Rotate the dial on the polarizer until the highlight turns dark brown. Record the rotation angle of the dial and the thickness of the point at this time, that is, the stress value can be converted using the formula. Calculation formula: stress=optical path difference/(optical path length of the measured point * photoelastic coefficient)=nm [cm * (nm/cm)/MPa]
 
 
That's it Stress meter Supplier - Dongyi Seiko's sharing of "Polarization Stress Instrument PSV-590 Equipment Use and Test Method".
The glass surface stress meter is used to check the size and distribution of stress in transparent objects. It is not only widely used in optical glass, optical instruments, glass products, plastic products and other industries, but also plays an important role in the inspection of safety explosion-proof indicators of building materials, lamps, pharmaceuticals, beverages, handicrafts, and also has many applications in the fields of crystal jewelry production, geology and minerals, and materials science. At the same time, the surface stress instrument provided by Dongyi Seiko is also an ideal teaching experimental equipment for colleges and universities.

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