Quantitative polarizing stress meter PTC-413

Scope of application:
Suitable for products with complex structures such as detection lamps.
Detect high-density plastic products, such as contact lenses, etc.
Detect optical crystals, optical lenses, such as calcium fluoride, etc.
Parameters:
Model

Size

Weight
Approx.
Effective length of measuring sample

Measuring space height

Light source
Light source (life span is about 10,000 hours)
Power supply
AC< br/>
Specifications
:
, Light field brightness of polarizing stress meter
, The polarization degree of any point of the polarizing element of polarizing stress meter is greater than or equal to 99%
The polarization field of this stress meter*
, the structure of the polarizing stress meter: a wave plate and a full wave plate (wavelength) are respectively placed between the analyzer and the polarizer. The slow axis of the wave plate and the polarization The polarization plane of the mirror is in degrees
and there is a measuring device for the rotation angle at the top of the analyzer (the scale value is in degrees and the maximum measurement range is in degrees)
Detection method
:
. - Photosensitive color method detection
Photosensitive color method measurement, the entire field of view is reddish-purple, this color is called photosensitive color.
Put in the sample, and the areas with stress will appear green-blue or orange-yellow. and determine whether the nature of the stress is pressure or tension.
The sample parts without stress are reddish-purple.
. Compensation method
The compensation method can perform quantitative analysis and detection of stress. Turn on the power, and the entire field of view before placing the sample will be dark brown. Put the sample in, and do not rotate the analyzer. The brightest point observed is the point of maximum stress. Rotate the dial on the analyzer until the brightest point turns dark brown. Record the angle of rotation of the dial at this time and the thickness of the point. You can use the formula to convert the stress value.
Calculation formula: stress optical path difference/(optical path length of the measured point * photoelastic coefficient)
[* (/)/]