Flat dome lighting is suitable for defect detection on curved products, surface inspection of metal products, and print inspection on irregular surfaces such as bumps. When combined with a polarizing filter on the lens, the impact of halation can be reduced, allowing for clearer observation in some cases.
● The degree of wear on drill bits
● Scratches and foreign objects in fibers
● Cracks in the bent section (marked area) of the processing
In all cases, normal ring lighting results in intense halation and reflections that obscure certain areas from view.
Switching to flat dome lighting with polarization improved visibility, but further enhancements were achieved by attaching a polarizing filter to the lens.
As measures to suppress halationare common approaches:
・ Using a monochrome camera
・ Attaching polarizing filters to both the lens and lighting
The advantage of this method is the use of a color camera and the installation of only a single polarizing filter on the lens, which allows the colors seen on the monitor to closely resemble those of the actual object, enabling observation without any color mismatch.
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Flat dome lighting DC-30D series |
