A point source of light that is not exactly in focus produces a disk image at the retina. Assume that the image is acceptable provided the image diameter of the defocused point source is less than a. Show that the depth of field is inversely proportional to the diameter of the aperture.
A point source of light that is not exactly in focus produces a disk image at the retina. Assume that the image is acceptable provided the image diameter of the defocused point source is less than a. Show that the depth of field is inversely proportional to the diameter of the aperture.
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A point source of light that is not exactly in focus produces a disk image
at the retina. Assume that the image is acceptable provided the image
diameter of the defocused point source is less than a. Show that the
depth of field is inversely proportional to the diameter of the aperture.
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