Industrial Inkjet
Code verification on glossy surfaces

Avoid reflections and glare

Diffuse lighting

To avoid reflections and mirroring, you need the right distance to the object, the right camera module and, above all, the right lighting. To be precise, diffuse lighting is required for code verification. Diffuse lighting is a uniform, soft light without shadows, contrast or extraneous light influences. This artificial indirect light is achieved using a diffuser (diffusing panel), which disperses the direct light before it reaches the product. For extremely diffuse lighting or DOME lighting, on the other hand, a matt white tube is used in the measuring chamber. Highly glossy surfaces are therefore no longer a challenge.

Objects from the medical technology or automotive industries often have complex 3D geometries that make it impossible to place the code to be checked directly on the code verification system. However, this is a decisive factor in achieving the goal of reproducible measurement results. A height-adjustable stand can help here. Installed in the stand, the code verification system can be precisely aligned with the product and the code can be read.

And the last decisive factor is the focal length of the camera module and, inextricably linked to this, the focus position of the object. The selected optical modules have to be adapted to the code size and module size on the one hand and take into account the distance (focus position) between the object and the verification system on the other.

All factors combined provide reliable and reproducible measurement results and quality assessments as required by marking regulations such as the Medical Device Regulation (MDR). Time delays produced by manual input because the code is not read immediately the first time will no longer disrupt operations.