초록 ▼

An imaging system for focusing and deflecting an electron beam comprises, as in prior systems, an evacuated envelope structure having a longitudinal axis and a solenoid for generating a substantially uniform magnetic field within the envelope and along the longitudinal axis thereof. As in prior syst

An imaging system for focusing and deflecting an electron beam comprises, as in prior systems, an evacuated envelope structure having a longitudinal axis and a solenoid for generating a substantially uniform magnetic field within the envelope and along the longitudinal axis thereof. As in prior systems of this type, the envelope includes an electrostatic yoke therein for generating a variable substantially uniform electric field within the envelope to deflect the electron beam along two coordinates of the system. The electric field is orthogonal to the magnetic field. An electron gun within the envelope generates and directs the electron beam through the magnetic and electric field to a target located opposite the electron gun and in a plane perpendicular to the axis of the tube. Unlike prior systems, the electrostatic yoke of the present system comprises a first conductive layer bonded to the interior surface of the envelope, and a second conductive layer overlying the first conductive layer. The first conductive layer has a thickness in the range of about 500 to 1000 Åand the second conductive layer has a thickness in the range of about 800 to 1500 Å. The first and second layers include two pairs of interleaved electrodes. A method of making the electrostatic deflection yoke is also disclosed.

대표청구항 ▼

In an imaging system for focusing and deflecting an electron beam comprising: an evacuated envelope structure having a longitudinal axis; magnetic field means for generating a substantially uniform magnetic field within the envelope and along said axis thereof; an electrostatic yoke within said enve

In an imaging system for focusing and deflecting an electron beam comprising: an evacuated envelope structure having a longitudinal axis; magnetic field means for generating a substantially uniform magnetic field within the envelope and along said axis thereof; an electrostatic yoke within said envelope for generating a variable substantially uniform electric field within said envelope to deflect said electon beam along two coordinates of said system, said electric field being orthogonal to said magnetic field; an electron gun disposed within said envelope for generating and directing said electron beam through said magnetic and electric fields; and a target located within said envelope opposite said electron gun, said target being disposed in a plane perpendicular to said longitudinal axis, the improvement wherein said electrostatic yoke comprising a first conductive layer bonded to said interior surface of said envelope and a second conductive layer overlying said first conductive layer and being in contact therewith, said first layer having a thickness in the range of about 500 to 1000 Åand said second layer having a thickness in the range of about 800 to 1500 Å, said first and second layers including two pairs of interleaved electrodes.