Television camera storage tube having continual readout

Claim 3

A method as defined by claim 1 wherein said electrons are collected on a signal plate which is biased positive relative to said electron gun.

Claim 4

A method as defined by claim 2 wherein said signal plate is biased negative relative to said electron gun during the first scanning by the electron beam.

Claim 5

Process comprising biasing a mesh support member and a photoconductor thereon to different potentials, the mesh being positive and the photoconductor being negative with respect to a cathode which generates an electron beam adapted to scan said mesh, focusing a light image on said photoconductor to cause it to conduct in incremental areas in proportion to the light intensity, thereby rendering portions of the photoconductor more positive, scanning the mesh with the said electron beam, whereby electrons pass through areas of the mesh where the photoconductor is more positive, and collecting electrons passing through the mesh to form a picture signal.

Claim 6

Process comprising biasing a mesh support member and a photoconductor thereon to different potentials, the mesh being positive and the photoconductor being negative with respect to a cathode which generates an electron beam adapted to scan said mesh, focusing a light image on said photoconductor to cause it to conduct in incremental areas in proportion to the light intensity, thereby rendering portions of the photoconductor more positive, scanning the mesh with the said electron beam, whereby electrons pass through areas of the mesh where the photoconductor is more positive, and collecting electrons passing through the mesh to form a picture signal.

Claim 7

Process as defined by claim 4, followed by raising the potential of the mesh to above the first crossover potential of the photoconductor, raising the potential of the element used for collecting electrons enough to repel electrons of the electron beam, scanning with the electron beam to cause emission of secondary electrons from the photoconductor, thereby raising its potential and erasing any charge image thereon, reducing the potential of the mesh to below the first crossover of the photoconductor, thereby reducing the potential of the photoconductor by capacitive effect to below its first crossover, and scanning with the electron beam to lower the potential of the photoconductor to near cathode potential.

Claim 8

A storage vidicon comprising: a tubular envelope, a transparent face plate closing one end of said envelope, a transparent conductive coating on the internal face of said face plate, an electron gun at the other end of said envelope, means for directing electrons from said electron gun toward said conductive coating, a conductive screen positioned adjacent but spaced away from said conductive coating in the path of the electrons from said electron gun, a photoconductive coating on the side of said conductive screen facing said conductive coating, means for applying at least two different potentials to said conductive screen, means for focusing a light image on said photoconductive coating through said face plate and said conductive coating, and means for selectively applying negative and positive potentials to said conductive coating.

Claim 9

A storage vidicon comprising: a tubular envelope, a transparent face plate closing one end of said envelope, a transparent conductive coating on the internal face of said face plate, an electron gun at the other end of said envelope, means for directing electrons from said electron gun toward said conductive coating, a conductive screen positioned adjacent but spaced away from said conductive coating in the path of the electrons from said electron gun, a photoconductive coating on the side of said conductive screen facing said conductive coating, means for applying at least two different potentials to said conductive screen, means for focusing a light image on said photoconductive coating through said face plate and said conductive coating, and means for selectively applying negative and positive potentials to said conductive coating.

Claim 10

In a storage tube for storing video images for readout over an extended period of time, a transparent signal plate, means for producing an electron beam and scanning it over a surface of the signal plate, a conductive screen positioned parallel to and spaced away from said surface so that the electrons of said electron beam must pass through the apertures of said screen to scan the surface of the signal plate, a photoconductive coating on the side of the conductive screen facing said surface, means for applying at least two different potentials to said conductive screen, and means for selectively applying negative and positive potentials to said signal plate.

Claim 11

In a storage tube for storing video images for readout over an extended period of time, a transparent signal plate, means for producing an electron beam and scanning it over a surface of the signal plate, a conductive screen positioned parallel to and spaced away from said surface so that the electrons of said electron beam must pass through the apertures of said screen to scan the surface of the signal plate, a photoconductive coating on the side of the conductive screen facing said surface, means for applying at least two different potentials to said conductive screen, and means for selectively applying negative and positive potentials to said signal plate.