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|Title:||General condition for moving objective lens (MOL) with combined electrostatic and magnetic fields|
|Source:||Zhao, Y.,Khursheed, A. (1999). General condition for moving objective lens (MOL) with combined electrostatic and magnetic fields. Optik (Jena) 110 (12) : 563-568. ScholarBank@NUS Repository.|
|Abstract:||This paper presents a theoretical study on the Moving Objective Lens (MOL) for general focusing and deflection system with combined electrostatic and magnetic fields. A general MOL condition is derived from the paraxial ray equation instead of from conventional field expansions. Conditions are predicated for hybrid-field MOLs in which the focusing and deflection fields are of different type. A test system consisting of a magnetic with bell-shaped axial field distribution and in-lens electrostatic deflectors is used to analyze the characteristics of the hybrid-field MOL. Third order geometrical and first order chromatic aberrations are also studied in comparison with its pure-field counterpart. Based upon these results, some applications of the hybrid-field MOL concept are recommended.|
|Source Title:||Optik (Jena)|
|Appears in Collections:||Staff Publications|
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