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Determine the suitable backlight - Calculating the working distance or backlight size

Normal", entocentric lenses have a fixed aperture angle, with increasing working distance the captured field of view increases.
However, the test object usually does not lie directly on the backlight, the illumination is usually somewhat further away.
As the field of view increases with a larger working distance, the illumination must also "grow" accordingly.
The maximum working distance or the required size of the backlight can be calculated here.

Calculation of the maximum working distance with known illumination size


Size of the component / field of view in mm:

Backlight size in mm:
Working distance from camera to component in mm:

Max. working distance from camera to lighting:
Max. distance between component (upper side) and illumination:


We respect your privacy: We do not store any inputs, results or recipients. Send your calculation with your own email program (MailTo-link).

Calculation of the required backlight size at a known distance


Size of the component / field of view in mm:

Working distance from camera to component in mm:

Working distance from camera to backlight in mm:
Required minimum size of backlight in mm:


We respect your privacy: We do not store any inputs, results or recipients. Send your calculation with your own email program (MailTo-link).

Durchlichtbeleuchtung Backlight Messen Bildverarbeitung

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