Expertise in Optical Metrology

Engineers working at Snellium have designed, developed and implemented a multitude of solutions for optical metrology of transparent and specular parts. We master the complete toolchain from the measurement hardware to the result display.

We developed prototypes for the measurement of the following metrics:

Sharpness Reduction and Pixel Distortion

These measurements are used to characterise the quality of an image when acquired through a transparent object. Using these two measurements, the effect of the object on the image can be described in both sharpness and distortion.

At Snellium, we developed a new approach allowing us to measure the two metrics at the same time. This saves time and money, but also allows easier study of correlation and dependencies between the two.

For more information about these metrics, take a look at our presentations of the Modulation Transfer Function algorithm for the sharpness reduction measurements and the Digital Image Correlation algorithm for pixel distortion.

Shape and Curvature

The measurement of the shape and curvature properties of an object are fundamental to assess its quality and study the performance of the production process. Today, most of the time these measurements are done using two separated setups.

At Snellium, we are able to compute both metrics together using Phase Measuring Deflectometry, improving proficiency and quality of the results.

Optical Distortion and Thickness

Using a collimated light system and previously described algorithms, we are able to compute optical distortion and thickness of transparent parts.

Collimated systems also allow the measurement the Sharpness Reduction and Pixel Distortion in a way that is independent of the camera system used. The combination of all these measurements composes the final solution for the automotive glass we propose.