适用范围：

检测小尺寸的玻璃容器或加工过程中的小尺寸的塑料产品，安装及条件检测。

参数：

循环偏振光法

整个视野将出现黑色。样品置于观测台，存在应力的部位为明亮的白色，没有应力的部位将呈现黑色，和未置样品时同样的黑色。

其中，变为蓝色、绿色、红色等颜色的位置，是应力比较多的集中区。

当应力比较大时，即使旋转样品，应力的分布也不会发生变化。检测不受主应力方向的影响。这一点便是循环偏振光法的优势了。

显示图像举例如下：
 

Example of Appearance under Inspection
Flowing State of resin	Unevenness of a film	Strain resulted from Processing
Strain and cracks in a molded article.
Sample with substantially no strain The whole of a sample appears dark in blackish color similarly to the visual field.	Sample with less degree of strain Only a region of a sample with strain appears in whitish color.	Sample with greater degree of strain Only a region of a sample with strain appears in whitish color, and the whitish region appears broader and brighter than that of a sample with less degree of strain.
Sample at the Reference Position/ Rotated Angle 0 X-shaped region in the transmission axis direction of a polarizer or an analyzer does not appear in blackish color. A region with strain appears in whitish color.	Sample rotated by 45 Pattern of strain in a sample does not change irrespective of causing rotation of the sample.	Sample rotated by 90 Pattern of strain in a sample is same as the patterns of samples rotated by 0and 45