Computerized Polariscope (Ref : PSV-702
)
This Polarimeter adopts automatic Senarmont to
measure the internal stress in
transparent objects . 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.
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
|
Detecting range
|
0-280nm
|
|
Magnification
|
1-24 times
|
|
Viewing field
|
max 176×132mm min 6.9×5.2mm
|
|
Accuracy
|
about ±1.5nm (scale compass rotation
: ±
0.5°)
|
|
Dimension
|
W280*D380*680mm
|
|
Light source
|
LED
|
|
Power supply
|
AC220V
|
|
Weight
|
15kg
|
Composition :
polarized stress meter , laptop computer ,
operating system,
CCD camera, zoom
lens, cable, operating manual etc
Detecting methods
Sensitive Color method
( roughly determine the location that has stress )
Senarmont
(Switch to Senarmont. Accurate test is performed
in the parts with stress. In the interface above
, the image luminance is 34.4
when the rotation angle on the scale compass is 0°.
Manually rotate the scale compass to adjust the
image luminance to the minimum. As
shown in the figure
below, the value is 16.5. A
nd the value of analyser
angle is the same as the
rotation angle on the scale compass. At this time, the software automatically calculates the stress
value 0.12KG/cm2 .
