WAVELENGTH CONVERSION LASER, IMAGE DISPLAY DEVICE AND LASER PROCESSING APPARATUS

摘要

A wavelength conversion laser is provided with a pair of fundamental wave reflecting surfaces which reflect fundamental waves so as to define a plurality of optical paths of fundamental waves passing through a wavelength conversion element at different angles; and a control device which controls wavelength conversion efficiency so that the wavelength conversion efficiency of a specified optical path has the highest wavelength conversion efficiency among the fundamental wave optical paths in different directions between the pair of fundamental wave reflecting surfaces.