Abstract A high-resolution direct-view storage tube comprises an envelope having a viewing face, a phosphorescent screen on the inner surface of the envelope face, a wire mesh signal-storage electrode adjacent the phosphorescent screen, an electron beam write-gun disposed to scan the storage electrode, a wide-angle flood-gun disposed to flood the storage electrode with relatively low-velocity electrons, and a collector electrode disposed between the storage electrode and the two guns. The tube further comprises a conductive coating for the phosphorescent screen effective to develop an electric field between such screen and the storage electrode for attracting electrons to the screen and a wire mesh control electrode adjacent the storage electrode for developing an electric field therebetween having a potential gradient approximately equal to that of the electric field on the opposite side of the storage electrode, whereby divergence of the electron streams passing through the storage electrode can be controlled by adjustment of the potential of the control electrode, preferably to minimize such divergence.
A high-resolution direct-view storage tube comprising: an envelope having a viewing face; a phosphorescent screen on the inner surface of said face; a foraminate signal-storage electrode adjacent said screen and comprising a conductive support having a dielectric coating on the side opposite said screen; an electron beam write-gun disposed to scan said dielectric coating of said storage electrode; an axial wide-angle flood-gun disposed to flood said dielectric coating of said storage electrode with relatively low-velocity electrons; a collector electrode disposed between said storage electrode and said guns disposed to collect secondary-emission electrons from said storage electrode; means for developing an electric field between said conductive support of said storage electrode and said screen for attracting electrons to the latter; and means including a foraminate control electrode between said collector electrode and said storage electrode and adjacent said storage electrode for developing an electric field between said control electrode and said conductive support having a potential gradient approximately equal to that of the electric field on the opposite side of said conductive support of said storage electrode, whereby divergence of the electron streams passing through said storage electrode may be controlled.
Claim 2
Dependent Claim
190 words
A high-resolution direct-view storage tube comprising: an envelope having a viewing face; a phosphorescent screen on the inner surface of said face; a foraminate signal-storage electrode adjacent said screen and comprising a conductive support having a dielectric coating on the side opposite said screen; an electron beam write-gun disposed to scan said dielectric coating of said storage electrode; an axial wide-angle flood-gun disposed to flood said dielectric coating of said storage electrode with relatively low-velocity electrons; a collector electrode disposed between said storage electrode and said guns disposed to collect secondary-emission electrons from said storage electrode; means for developing an electric field between said conductive support of said storage electrode and said screen for attracting electrons to the latter; and means including a foraminate control electrode between said collector electrode and said storage electrode and adjacent said storage electrode for developing an electric field between said control electrode and said conductive support having a potential gradient approximately equal to that of the electric field on the opposite side of said conductive support of said storage electrode, whereby divergence of the electron streams passing through said storage electrode may be controlled.
Claim 3
Dependent Claim
41 words
A high-resolution direct-view storage tube in accordance with claim 1 in which the potential gradient of the electric fields on opposite sides of said storage electrode are equal, whereby divergence of the electron streams passing through said storage electrode is minimized.
Claim 4
Dependent Claim
26 words
A high-resolution direct-view storage tube in accordance with claim 1 in which said storage electrode and said control electrode are in the form of wire meshes.
Claim 5
Dependent Claim
43 words
A high-resolution direct-view storage tube in accordance with claim 1 in which the ratio of the storage electrode-screen distance to the storage electrode-control electrode distance is equal to the ratio of the storage electrode-screen potential difference to the storage electrode-control electrode potential difference.