CONVERSION METHOD OF LASER ENERGY DISTRIBUTION

摘要

PURPOSE:To widen the using range of a laser beam and to decrease the loss of energy with a conversion of its distribution by heating a part of the gas in a route for the laser beam and changing the refractive index of the gas with respect to the wavelength of the beam thereby flattening the laser energy distribution. CONSTITUTION:An incident laser beam 6 from an oscillator is normally distributed 7 and is irradiated by a reflection mirror 8 to a work 9. Heating air is blown from the nozzle 14 of an air chamber 13 contg. a heater 12 to the beam from the circumference. The course of the beam 6 is changed by the numerous irregular changes in refraction so as to have a flat energy distribution 16. Not only the using range is thus widened but also the number of reflection mirror is decreased and since no integrator, etc. are used, the loss of the laser energy is decreased.