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On the rotation-free and distortion-free systems

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Special attention has been paid to the projection system. The rotation free-system was studied in detail. The existence of spiral distortion is intimately related to the rotation of the image that takes place in the magnetic electron lenses. The improved performance has been achieved by the simultaneous correction of spiral and radial distortion in a two single pole lens system. Values of the chromatic change of magnification and rotation are estimated.
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Document Type: Research Article

Affiliations: Department of Physics, Assiut University, Assiut, Egypt

Publication date: 2004-02-01

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