Dimensional inspection

Dimensional inspection is performed on geometrical aspects of products. This includes a long list of measurements including length, height, diameter, radius, depth, incision, >> measurements. Usually the product is illuminated using back light (bright field) illumination making the edges of the product clearly visible.

For full inspection the products are normally rotated. This requires dedicated and stable handling of the products as misalignment or vibration may cause incorrect measurements. Inspection without rotation is also performed. In some cases rotation is not an option due to production speed, product shapes, production process etc. In these cases multiple image views can be used to get a full view (360 degrees) of the product.

Vision camera technology

Some products need dedicated measurements such as OPC (One Point Cut) measurement for ampoules. The cut, point and rings need to be measured accurately but this requires special lighting and a dedicated camera view. With a regular view the foreground and background of the rings may overlap leading to incorrect measurements (for minimum values).

Also gaps, holes and satellites may not been seen with a “regular” view. For other products additional viewing angles may be needed to see all aspects.

For correct Inner Diameter (I.D, flange ID, vial ID, >> a perpendicular view may be needed. This can be completed by a telecentric lens. Also customized views have been realized where the system looks inside the products.

General overview