Image dissector for counteracting magnification due to range closure

Claim 1

An image dissector tube for counteracting the effect of magnification of objects within the scene image, comprising: a. a tube housing having a transparent input end; b. a photocathode means at the input end of said tube for emitting an electron image of objects in a scene viewed at said tube input; c. readout means; d. focusing means for focusing the electron image emitted from said photocathode means and projecting the image upon said readout means; e. deflection means for moving the focused electron image about the surface of said readout means; f. said readout means comprising an aperture plate having a plurality of apertures extending from the center in progressively increasing magnitude to the outer edge of said aperture plate for sampling the electron image; g. an output anode for each aperture in said aperture plate to which is fed electron energy from respective apertures; h. respective microchannel electron multipliers provided for each aperture between respective apertures and output anodes to provide additional gain; and i. the size of said electron multipliers in both diameter and length being in proportion to their respective apertures.