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Journals and Conferences
A classification scheme and nomenclature for inhomogeneous refractive-index distributions is proposed which is consistent, unambiguous, and appeals to intuition. The classification is based on (1) the generic shape of the isoindicial surfaces, (2) the detailed dependence of the index on some position coordinate characterizing the isoindicial surfaces, and… (More)
The mathematical content of a simple modelTUBERS predicting the graded yield and development of potatoes is summarised. The operation of this model using a pocket calculator is demonstrated using a systematic tabular computing scheme and a set of tables. The facilities available in a personal computer programTUBERS PC based on this model are described.
The aberration coefficients of Buchdahl have been used almost exclusively in situations where rays are specified by their points of intersection with a pair of planes in the object space of the system. A simple method is presented in this paper whereby rays may be specified by their points of intersection with a pair of not necessarily plane surfaces… (More)