ELECTRON BEAM SCANLASER HAVING PHOTOCHROMIC Q-SPOILER

摘要

An optical system for controlling the direction of lasing action by utilizing photochromic material as a passive Q-switcher in the cavity of an angularly degenerate laser. By controlling the optical density at various points on the photochromic material, the laser can be made to radiate in any desired direction. A cathode-ray tube is used to generate a controllable spot of light, the wavelength of which is such that it changes the optical density of the photochromic material.