Application: Optical Tomography

How does it work? We'll tell you: we use a physical trick - when you put stress on a body, it deforms. This response - the change in shape - is the result of the stiffness of the body, which is often very complex. For example, material combinations, body shapes and joint types interact spatially and non-linearly.

We have succeeded in predicting this behaviour and mapping it in our intelligent software in a simple and decomposed way. The key to this world of deformation is stable, fast and highly accurate sensing. This is what our patented camera sensor technology does. We measure nanometre-scale deformations in fractions of a second. The system is suitable for fully automated use in harsh production environments.

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Camera tomographic inspection of moulded circuit boards. The right column (1) shows the test result for a flawless moulding compound. The electronic components on the board are also visible. (2) shows the result for a component with air inclusions near the centre chip. In (3) these defects have been automatically coloured. At this point, key figures are also available for further documentation (No. of defects, depth, diameter, etc.)

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So how do I use Camera Tomography? Quite simply:

1. Test components are placed under the camera.

2. The component is precisely stressed by an excitation module (heat or pressure). This involves a heating of +2 Kelvin or a pressure change of 20 mbar. During this excitation, a short video is recorded for approximately 1 second. The software automatically calculates the depth view with real-time display.

3. The test result can be analysed manually or automatically. The software contains various algorithms for defect detection (e.g. delaminations, inclusions, cracks).