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- W173625629 abstract "An arbitrary choice of image curvature is impossible. Coefficients of curvature are subject to limitations connected with parameters of Gaussian optics. Such limitations are represented in the form of inequalities that do not include distributions of field between conjugate points. Sagittal curvature is constant in sign and greater than a certain positive quantity. Limitations for meridional curvature de pend essentially on the location of the diaphragm. Deduced formulae allow the exclusion of regions of the diaphragm for which a correction of curvature is impossible. For the meridional curvature of extremely short lenses to have positive values, it is sufficient that magnification m satisfy the condition --4 < m < --1/4, regardless of the co-ordinates of the diaphragm. Astigmatism is not subject to limitations which exist for other curvature coefficients. Curvature coefficients are represented by convenient positive forms in the case of which the accumulation of errors is reduced to a minimum, and which are applicable to experimental field distribution data. The formulas obtained are in accordance with relativity. There is a quantitative dependence of the curvature coefficients of magneto-immersion systems upon initial field tensities and normal coefficients of aberration. This dependence is expressed in a simple formula which takes accountmore » of the normal coefficients of curvature, spherical aberration and anisotropic coma. There are no grounds for asserting that the curvature of image in magnetic fields is incorrigible. Such assertions are due to the obvious generalization for arbitrary fields of results applicable in the case of short fields only. (auth)« less" @default.
- W173625629 created "2016-06-24" @default.
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- W173625629 date "1961-01-01" @default.
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- W173625629 title "SOME PROPERTIES OF THE CURVATURE OF THE ELECTRONOPTICAL IMAGE IN MAGNETIC FIELDS" @default.
- W173625629 hasPublicationYear "1961" @default.
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