Uniform laser output intensity device and its applications.

Abstract

A laser beam is usually circular with a Gaussian distribution. However, frequently, a uniform output intensity distribution is required. In the device described in this paper alaser beam enters a square pillar at a predetermined divergent angle and undergoes repeated total reflection at the walls of the pillar. Thereafter, when the size of the pillar and divergent angle are suitably selected, a uniform output intensity distribution is obtained at the distal end ofthe pillar. In this paper, we described analysis of the device and the application of ruby and argon lasers to the treatment of hyperpigmented skin lesions. Also described are the applications of the device to laser marking and soldering.