Vignetting

Relevant for: ImageMaster^®

Vignetting in an optical system is the gradual reduction of the image brightness with increased off-axis angle. This phenomenon results from the apparent limitation of the clear aperture depending on the field angle.

Vignetting is defined as the ratio of the central transmission and the transmission at the edge of the field of view.

The ImageMaster^®-Software measures continuously the light intensity of the test pattern in order to avoid saturation. In this way the necessary data is available for determining the vignetting.

Relevant for: ImageMaster^®