Multiline emission integral mirror laser

Abstract From the Canadian patent

An integral mirror type laser system which produces multiline emissions simultaneously and which is adapted for use in optical data processing systems. In particular in a, first embodiment, a unitary positive column laser comprises two sections, the first section comprising a positive column helium-cadmium laser, the second section comprising a positive column helium-neon laser, the first and second sections being coaxially aligned and having different inner diameters. Simultaneous excitation in the two different sections provides optimum excitation for red laser light produced by the helium-, neon section and blue laser light produced by the helium-neoncadmium section. The present system …