title: Polychromatic MTF of electrostatic point symmetric electron lenses.
abstract: Electrostatic electron lenses have been evaluated in terms of their image transfer characteristics. The effect of polychromatic radiation with different spectral energy distributions on the performance of an electron emitter-lens combination has been studied.
authors.affiliation: Instruments Research & Development Establishment, Dehra Dun-248008, India.
authors.forename: O P
authors.initials: OP
authors.lastname: Nijhawan
authors.forename: S K
authors.initials: SK
authors.lastname: Gupta
authors.forename: R
authors.initials: R
authors.lastname: Hradaynath