Abstract: A one-piece control grid for functioning as an astigmatic lens in an electron gun has an arcuate slot formed in the face of the grid. A suitable beam aperture is provided at the bottom of the slot.

Abstract: A one-piece control grid for functioning as an astigmatic lens in an electron gun has a milled, ground, or machined slot formed across its functional grid area. A suitable beam aperture is provided in the bottom of the slot.

Abstract: The haze around the electron beam spot in the corners and at the edge of the display screen is reduced by using in the electron gun a first grid of a construction such that a multipole lens which is mainly a first quadrupole lens is formed in cooperation with the cathode. The first grid in cooperation with the second grid also forms a multipole lens which is also a mainly second quadrupole lens and which is rotated 90.degree. with respect to the first quadrupole lens. Such a system of lenses in the first grid can be formed, for example, by providing in the first grid an aperture with elongated openings both on the side of the cathode and on the side of the second grid. The longitudinal axis of the elongated opening on the side of the cathode is substantially at right angles to the longitudinal axis of the elongated opening on the side of the second grid.

Abstract: This disclosure depicts a television cathode ray picture tube having a plural-beam electron gun for projecting in superimposition on the picture imaging screen of the tube at least two electron beam spots. The gun includes at least one aperture electrode having an aperture for passage therethrough of each of said beams. The beams are subject to a first-order aberration attributable to the aperture electrode resulting in the astigmatizing, and consequent distortion of, the beam spots. This astigmatizing is due to the coalescing of electric field vectors contiguous to each aperture with the vectors of at least one adjacent aperture. The improvement comprises shielding means interposed between the apertures comprising wall means. The wall means are effective to mutually shield the apertures and isolate the electric field vectors to ameliorate the first order aberration.

Abstract: The envelope of an image display device has front and rear walls spaced from one another with a cathodoluminescent screen on the front wall. Within the envelope are a plurality of electron beam guides parallel to the rear wall and a source of electrons at one end of the beam guide. Each beam guide has at least one electrode adjacent to and parallel to the rear wall. A plurality of spaced parallel wires arranged in a common plane are between the electrode and the front wall. An electrically conductive mesh is parallel to the plane of wires between the plane and the front wall. The mesh has a plurality of closely spaced apertures which are not greater than 26 microns wide in one dimension.

Abstract: This disclosure depicts a novel electron gun having at least one cathode having an electron emissive coating, a forward element and a plurality of electrodes interspaced between the cathode and the forward element. The electrodes and forward element each have at least one aperture wherein the apertures in the electrodes and forward element are coaxial and define at least one beam passageway for passing through the gun a stream of electrons emitted by the cathode during operation. The beam passageway unavoidably forms a conduit for high velocity gas when the gun is located in a narrow neck of a television picture tube and the tube is evacuated of gas through a tubulator located at the rear end of the neck. The improvements in the electron gun comprise a gas influencing element for reducing and perturbing the high velocity gas flow in the conduit at least in the region of the cathode as the tube is evacuated to suppress erosion of the cathode coating by preventing a violent flow of gas over the cathode.

Abstract: This disclosure depicts and describes unitized electron guns for color television cathode ray tubes, and is particularly addressed to an improved structural design for elongated electrodes of such guns in which undesired internal interaction between adjacent electron beam-forming fields is prevented. This sheet metal electrode design also has the advantage of lending itself to economical manufacture.

Abstract: An electron beam producing arrangement for a cathode ray tube comprises a vessel shaped control electrode with a bore therein for passage of the electron beam and a hat shaped metal foil element with its crown in the bore and apertured for the passage of the electron beam and fixed to the edge of the bore by its brim.

Abstract: In the tube gun, at least one of the two electrode grids nearest the screen has extensions on opposite sides of its apertures to distort an electrostatic field formed by the grid to at least partially compensate for distortion of an electron beam in the magnetic deflection field.

Abstract: A nickel oxide surface layer of a nickel mesh supporting structure is coated with a layer of chromium. The nickel oxide layer has a thickness of between about 500 to 750A. The layer chromium is at least about 100A thick. The chromium coated nickel oxide-nickel mesh is particularly suitable for use in vidicon tubes.

Abstract: An electron beam collimator formed by two pairs of multi-leaved corner plates connected by slideable members permitting the dimensions of the collimator to be altered.

Abstract: The invention relates to an improved one-piece electrode member for use in an in-line multi-beam cathode ray tube electron gun assembly. The improved electrode has a plurality of spaced apart in-line apertures individually oriented in cup-like depressions which are collectively encompassed by a configurated continuous rim forming a cup encompassing unitized portion within the member. Formed contiguously with each side of the unit is a substantially longitudinal rib embossment having at least one complementary rib projecting therefrom in an angular manner to extend through supporting projections of the electrode. The discretely located conjunctive embossing configurations of the member provide marked strengthening to the in-line structure.

Abstract: The invention relates to an improved planar electrode member for use in an in-line multi-beam cathode ray tube electron gun assembly. The improved electrode is a substantially planar one-piece member having a plurality of apertures therein. The side portions of the member have longitudinal strengthening bends formed therealong in conjunction with a plurality of rib embossments spatially formed as traversals crossing the member to join the side oriented bends thereby providing improved strengthening to the structure.

Abstract: A pyroelectric vidicon employs heating means for stabilizing the target temperature.

Abstract: In an ion implantation apparatus, means for forming multiple, separate parallel ion beams, each having a predetermined spot diameter, and means for focusing each of said ion beams upon a predetermined chip area of a target wafer whereby multiple chip areas upon the wafer can be simultaneously implanted with prescribed ion dosages.

Abstract: A digitizing matrix for electron beams of the type wherein electrons are permitted to pass through openings in the matrix to a target which is scanned with an electron beam. The target is formed from a series of stacked electrode units each formed by electrically-conductive layers extending perpendicular to each other and through which the aforesaid openings pass. By establishing an electrical potential between crossed conductive layers, an electric field will be generated in the area defined by the crossed conductors to stop passage of electrons through one or more of the openings in the aforesaid area. The invention is characterized in that the stacked electrodes are formed as a single unit by thick film techniques wherein successive layers of a dielectric and crossed conductive layers are formed. The assembly facilitates the fabrication of very thin, high electron efficiency, low capacity and low cost flat panel matrices.

Abstract: A television camera tube having a conductive gauze behind the target plate, the parallel wires of which cross each other at an acute angle which has been suitably chosen to minimize interference in decoded colour signals.

Abstract: A cathode ray tube is disclosed in which an electron beam is deflected to scan a phosphor screen for producing a picture thereon, and which has an electrostatic beam control device for deforming the cross section of the beam so as to compensate for the distortion in shape of the beam landing spot on the screen at its peripheral portion caused by the beam deflection and a magnetic beam control device for deforming the cross-section of the beam dynamically in response to the beam deflection so as to compensate for the distortion in shape of the beam landing spot on the screen at its central portion caused by the electrostatic beam control device.