Measurement of plane parallelism of piezo-stacks

Today, manufacturers face the increasing demand of ever more sophisticated fuel injection systems for lower fuel consumption and a decrease of pollution and noise.


The use of piezoelectric fuel injection systems allows, due to their low mass and short switching times, the exact control of both the injection discharge rate and the injection fuel quantity.

For EPCOS, an automotive supplier and manufacturer of fuel injection systems with a leading competence in piezo technology Alicona have developed a robust and highly accurate measurement bench to measure the plane parallelism of the stack.

Based on two optical white light sensors the system measures the distance between the two faces, measurement results have a resolution below 1µm towards the optical axis.

Length measurement has an accuracy of ~ ±1µm.

Accuracy and automatic self calibration are achieved throughout the process by an integrated calibration tool.

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3d micro-coordinate measurement technique for roughness and form measurement

Alicona offers optical 3d surface measurement systems for quality assurance in research and production. Core competence is the measurement of roughness and form also across large measurement areas and volumes. The cutting edge measurement and the measurement of small radii and angles are typical applications. Focus-Variation, the core technique of the InfiniteFocus line, combines the traditional surface metrology and the micro coordinate measurement technology. This technology achieves traceable and repeatable results in highest resolution even in production.