General Electric Company

Other

David P Benfey

Sam S Jobes

Gary Daniel Miller

David Chester Brown

William C Wheeler

Harold L Herz

John D Jordan

The present invention features a slab laser apparatus having a stable/unstable resonator. The slab laser comprises a slab-shaped medium for producing a beam of coherent light. The slab-shaped medium is physically defined by an entrance end face; a rear, exiting end face; and two oppositely disposed and substantially parallel side faces. The respective end faces of the medium are disposed along an axis defining a 'p' plane; the side faces are disposed along an axis defining an plane. A light beam entering at the entrance end face of the slab-shaped medium along the 'p' plane axis reflects back and forth within the slab-shaped medium via total internal reflection, exiting at the rear end face. A stable optical cavity is defined for the 'p' plane, comprising a hemispherical, high reflector curvature having an finite radius of curvature, and a flat, partially reflecting, outcoupler. An unstable optical resonator is defined for the plane, which operates in a low order transverse mode. The resonator in the plane consists of a high reflector mirror, and a negative radius of curvature, partially reflective mirror. The partially-reflecting outcoupler is a substantially cylindrical optical component onto which has been coated a variable reflectivity mirror (VRM) profile. The transmission of this mirror surface varies in the transverse direction. The optical component is flat in the 'p' plane and cylindrical in the 's' plane. The VRM coating is disposed on the cylindrical face. The outside surface may be coated with an anti-reflective coating.

Slab laser

A CRT display is provided with a multiple-pole, double-throw switching mechanism, which in conjunction with alternate circuitry provides a means for easily reconfiguring the CRT display presentation. By operating the switches the normal left to right, the top to bottom raster scan may, for example, become a bottom to top, left to right raster scan. When applied to a multicolor CRT display, a second multiple-pole, double-throw switching mechanism serves, upon operation, to redirect beam convergence signals in compliance with the reconfigured format effected by switching the deflection signals.

Format reconfigurable CRT display

A high voltage power supply of the flyback type typically used in cathode ray tube displays or TV receivers operates in synchronism with the scan rate frequency of display and may either be self-synchronizing, externally synchronized, or externally directly driven. The power supply has a relatively high efficiency (75%), regulates three output voltages to within .+-.0.1% against source voltage variations and regulates its highest level voltage output to within .+-.0.1% against source voltage and load variations.

High voltage power supply

Growing community of inventors

Endicott, NY, United States of America

David P Benfey