Calculating the illuminated image region (FOV)

In a large number of machine vision applications, LED illumination is used today. Typical radiation angles of an LED are mostly around 30 degrees, in special cases up to 120 degrees. The larger the radiation angle, the larger the illuminated object region. The illumination intensity, however, decreases as a function of working distance and aperture angle. LED illumination with widely radiating characteristics is often used in case of close working distances, not in order to illuminate large regions.

The following calculations apply to a dot-shaped light source, the actual size of the illumination is not considered!

Note: Even when using the drop-down lists own values can be entered. Please use the first entry "user def."!

Angle of radiation led:	User def. (deg.) 1 degree 5 degrees 10 degrees 15 degrees 20 degrees 25 degrees 30 degrees 35 degrees 40 degrees 45 degrees 50 degrees 60 degrees 70 degrees 80 degrees 90 degrees 100 degrees 120 degrees
Working distance of light source in mm:
Approx. diameter of light spot of point light source:
Area in square meters:

Attention: Please explicitly observe the data sheets of the illumination manufacturers about the homogeneity of the light dot and the reduction of the illumination intensity towards the margin!