Grating coaxial line scan light application
Theory： 
Use new optical element with coaxial line scan light can be used for detection of bump on smooth surface. The light source is equipped with a grating element. When a bump is detected, the fringe image will be deformed, and the deformation position is the position of the bump.
Feature：
1.High light transmittance, good uniformity
2.Designed with coaxial line scan light
3. Special optical design, good imaging effect
Application：
1.Detection of bump, scratch, dark spot on smooth surface
Case:
1.Reflective film surface, bump detection
Workpiece picture 1.
Effective picture 1.
2.Mobile phone polarizing film surface, bump detection
Workpiece picture 2.
Effective picture 2.
Note: For bump points on smooth surface, it is easy to find the defect location and enlarge the defect by judging the bend of the stripe. Line scan system has a large detection area, and a relatively large light source can be selected according to the size of samples to meet the FOV. The uniformity line scan light is better than that of area scan light.
3. Polarizing film slight scratches and other detection
3. Polarizing film slight scratches and other detection
Workpiece picture 3.
Effective picture 3.
