关键词: 激光；光学透镜；温度场；有限元法；Matlab

Abstract:

For the problem of the thermal effect of laser irradiating optical lens, using finite element method to deduce the finite element scheme for solving heat conduction equation of optical lens model and calculating the temperature field distribution in optical lens based on pulsed laser irradiation by using the MATLAB program. The results show that the temperature of optical lens decreases with the increase of laser spot radius and increases with the number of laser pulses increasing which is not significant for rising the temperature of the materials by the cumulative effect of laser energy. Increasing with the increase of the laser power that is a significant factor to affect the materials temperature. When the power of the laser increases to a certain numerical that is 250mw will cause the optical lenss damage caused by melting the material.

Key words: laser;optical lens;temperature field;finite element method;Matlab