| 摘要 |
PURPOSE:To allow the conversion of a large-output laser beam to a radiant heating source of a specially uniform energy distribution by irregularly reflecting the above-mentioned laser beam by the local bends of the light guide, providing a convex lens and an aperture at the exit end of the guide and then adjusting the distribution intensity. CONSTITUTION:The light of a high-luminance light source or large-output laser 1, etc., is made incident on the step index light guide 4. The local bends 5 are formed at the guide 4 to generate the irregular reflections in the light beam and to uniformize the energy distribution in the light guide. The real image at the exit end face of the light guide 4 is then formed on the aperture surface having the aperture of an arbitrary shape by a 1st convex lens 6 and further the real image of the aperture is formed on an objective lens 11 by a 2nd con vex lens 9. The large-output laser beam is converted to the beam of the spacially uniform energy distribution in this way. Contribution is thus made to the improvement in the accuracy of laser beam processing, the enhancement of a heat treatment, the improvement in the accuracy of measuring techniques, etc. |
