HOW TO SOLVE COMPLICATED

ILLUMINATION SET UPS >

Learn more about intelligent lighting | Part 2

Read more
Innovative camera features

GET MORE OUT OF YOUR GIGE

VISION SYSTEM ARCHITECTURE >

Learn more about two great innovative camera features

Read more

LINE SCAN BAR >

Fast and precise, flat and wide

Read more

Vignetting

All images from lenses suffer from intensity variation from the centre to the edge of the image. As this can affect the suitability of a lens for an application, it is often necessary to examine the performance of a lens for this behaviour, which is known as vignetting.

The effects of vignetting can be pronounced, and care must be taken when choosing the optimum lens solution. Vignetting is particularly undesirable in line-scan cameras, as it creates an uneven sensitivity across the sensor which can be very long.

In contrast to sensor-shading, where the intensity variation is caused by the sensor, vignetting is primarily caused by the lens.

There are two types of vignetting:

  • Lens or mechanical vignetting (shadowing)
  • Cos4 vignetting

Learn more on this topic with our Imaging & Vision Handbook! Order it now for FREE!