Field of View and Focal Length The calculated field of view refers to the size of the object being taken. The size of the field of view is determined by the distance from the lens to the object being picked up, the focal length of the lens and the required imaging size.
The focal length of the lens, the size of the field of view and the distance from the lens to the object being taken are calculated as follows:
f = wL / W
f = hL / H
f: lens focal length
w: width of the image (image width of the object on the CCD target surface)
W: Subject width
L: Distance from the subject to the lens
h: height of the image (height of the subject imaged on the CCD target) field of view (scene taken) height
H: The height of the subject
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