Abstract
IN the opening paragraphs attention is directed to the methods of treating the aberrations on the principle of equal optical paths (A. E. C., Monthly Notices of R.A.S., January and March, 1904, and April, 1905) and to the author's recent determination of the actual light distribution at and near the focus in the presence of aberration (Monthly Notices, June, 1919). The sine-condition is also discussed.
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Microscopical Optics 1 . Nature 104, 548–550 (1920). https://doi.org/10.1038/104548a0
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DOI: https://doi.org/10.1038/104548a0