The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1987
Filed:
Aug. 06, 1985
Karl G Hernqvist, Princeton Township, Mercer County, NJ (US);
RCA Corporation, Princeton, NJ (US);
Abstract
An inline electron gun for generating and directing three electron beams, a center beam and two side beams, along initially coplanar paths includes an electrostatic main focusing lens for focusing the electron beams. The main focusing lens is formed by two spaced electrodes, each having three separate inline apertures therein. A first of the main focusing lens electrodes includes a first cylindrical portion having a diameter larger than the sum of the diameters of the apertures therein. A second of the main focusing lens electrodes includes a second cylindrical portion having a diameter larger than the diameter of the first cylindrical portion of the first main focusing lens electrode. At least part of the first cylindrical portion of the first main focusing lens electrode is located within the second cylindrical portion of the second main focusing lens electrode. The largest component of the main focusing lens is established by the first and second cylindrical portions. Secondary components of the main focusing lens are established by adjacent apertures in the first and second main focusing lens electrodes.