Glass is an essential material used across many industries — from architecture and electronics to aerospace and medical devices. With modern advancements, new types of high-tech glass like 3D curved glass, smart glass, and optical glass are now common.
These advanced glass products require high-precision quality control, especially in surface inspection, to ensure there are no scratches, particles, or defects that could impact performance.
Why Surface Defect Detection Matters
Glass manufacturing involves many complex steps: cutting, grinding, polishing, bending, cleaning, and more. Among these, surface quality inspection is critical — it directly affects product yield and helps reduce cost losses for manufacturers.
The Measurement Challenge
In this project, the goal was to inspect circular glass wafers for very small defects like:
Scratches
Tiny foreign particles (as small as 2 μm in diameter)
Surface irregularities
The Solution
HPS-LCX1000 3D Line Confocal Sensor was used for this task.
Key features of the setup:
Scanning Method: Non-contact 3D surface scanning using line confocal technology
Accuracy: Capable of detecting defects down to 2 μm
Surface Scanned: Both sides of the circular glass sample
Alignment: The glass sample platform was kept parallel to the sensor head for accuracy
Speed: Scanning speed reached up to 12.4 mm/s
Results
The sensor successfully detected fine scratches, missing areas, and micro foreign particles
Stable performance even on reflective glass surfaces
Ideal for transparent and curved glass inspection
Fully suitable for industrial automation and quality control systems
