a small spot of typically 200 2000 nm in the plane 15 this plane 15 is subsequently projected using demagnifier 14 onto the converter plate 2 the demagnifier can be a 1 1 projector or may be capable of projecting at a reduced size for instance 1 4 in fig3 furthermore an aperture plate 40 and electrostatic deflection strips 41 are shown the electrostatic deflection strips 41 are connected to a power source 42 in this embodiment the scanning of beamlets 6 is performed by electrostatic means the electrons are first accelerated towards aperture plate 40 in the second part of their trajectory after passing the aperture plate 40 the electron beamlets are deflected by strips 41 which carry voltages alternatively positive and negative the combination of the focussing magnetic field and the electrostatic field deflects the electrons in a direction perpendicular to both the magnetic vide fig1 and electrostatic field another embodiment of the current invention shown in fig4 uses an array of light sources close to or directly on top of the converter plate 2 this array of light sources can for instance be an array of light emitting diodes led 39 s 2 the light sources are switched on and off using computer system s 8 the light sources are connected to the computer systems 8 by electronical data cables 20 in order to reduce cross talk an optical fiber plate can be placed between the array of light sources and the converter plate 2 in another embodiment the array of light sources is projected onto the converter plate 2 using a demagnifier in.