Stigmatic Demagnified Image Formation by Three Elements Electrostatic Quadrupole Lenses
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概要
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Stigmatic demagnified real image can be formed by three elements electrostatic quadrupole lenses. A first element acts as a strong focusing singlet and it forms astigmatic virtual image within it. By thinking of this image as an object, a stigmatic real image is formed by a following doublet at a desired distance outside the lens system. A large demagnifying ratio can be obtained over a wide range of object and image distances under reasonable ratio of them. Lens strengths of the three elements for such an operation are given as a calculated under a modified bell-shaped model. The model can be defined by two parameters determined by electrolytic tank experiments. The calculated results using a rectangular model, which is used frequently for its simplicity, are also given and compared with the former results.
- Elsevier Scienceの論文
- 1973-05-00
Elsevier Science | 論文
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