Answers are grounded in this paper and cite their sources.
The response of a defocused aberration-free optical system to line-frequencies in the object is studied analytically. Curves are given showing the response as a function of line-frequency for a range of values of defect of focus. A comparison is made with the results to be expected from geometrical optics. A tolerance for defect of focus is obtained, which accords well with published experimental results. Both circular and rectangular apertures are considered.
No takes yet. Share an insight, caveat, or question.
Harold H. Hopkins (1955) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: