适用范围：

l        精确检测相机，显微镜的镜头。

l        加工中的塑料模具的调整与检测。

l        检测玻璃艺术品等。

参数：

感光色方法检测

感光色方法测量，整个视野呈微红-紫色，这种彩色氛围被称为感光色。

放进样品，存在应力的部位呈绿-蓝色或橙黄-黄色。确定应力性质是压应力或张应力。

不存在应力的样品部位则呈微红-紫色。

Stress-direction-determining bar with no strain Stress-direction-determining bar <Acryl> having strain Stress-direction-determining bar <Glass> having strain The whole bar appears in reddish purple (sensitive color) similarly to the color of visual field. When force is applied with fingers to a bar, stress in tension is liberated in the direction indicated by arrows ←→ in the upper region of the bar, while stress in compression is liberated in the direction indicated by arrows ←→ in the lower region of the bar. When force is applied with fingers to a bar, stress in tension is liberated in the direction indicated by arrows ←→in the upper region of the bar, while stress in compression is liberated in the direction indicated by arrows←→ in the lower region of the bar.

* Due to difference in quality of a material, such as glass and acryl, there may a case that the foresaid relativity between the stress direction and the color change cannot be applied. In order to carry out accurate determination, it is recommended to check color change beforehand with a bar-shaped sample for preliminary purpose, which is made of the same material as that of a sample to be inspected.

Flowing State of Resin	Unevenness of Film	Strain resulted from Processing
Strain and cracks in a molded article.
Sample with substantially no strain Color of region in outer periphery of a sample, where strain exists, changes to greenish and bluish color or orangish and yellowish color.	Sample with less degree of strain A rotating frame of analyzer is rotated so that a region to be assayed (indicated with an arrow) gets darker.	Sample with greater degree of strain Color change of region in the outer periphery of a sample, where strain exists, extends inwardly. Also, the yellowish or bluish color appears more intensive and brighter than that of a sample with less degree of strain.
Sample at the Reference Position/ Rotated Angle 0 Only X-shaped region in the transmission axis direction of a polarizer or an analyzer does not cause color change and is kept in reddish purple color (sensitive color) similarly to the visual field.	Sample rotated by 45 X-shaped region appeared in sensitive color remains in the same direction irrespective of the direction change of a sample. Due to this, the pattern of strain varies.	Sample rotated by 90 Pattern of strain in a sample is same as that of a sample at the reference position.