该装置由激光棒、聚光腔、泵灯、泵浦电构成,其特征是在激光棒前放置三面体定向棱镜,并使其角顶置于激光的轴线上。将三面体定向棱镜放入形座筒内,用连接螺灯将三面走向棱镜、锥形座筒连为一体、在激光棒的一端面上镀透反膜与三面体定向棱镜构成免调结构。(中国专利号:98235103.8) The device is composed of a laser rod, a condensing cavity, a pump light and a pump power. The utility model is characterized in that a trihedral directional prism is arranged in front of the laser rod and the angle top is arranged on the axis of the laser. The trihedral orientation prism into the seat seat tube, connecting the screw lamp will be three to the prism, the cone seat cylinder as a whole, one end face of the laser rod coated with transflective membrane and trihedral directional prism constitute a tune-free structure. (China Patent No.: 98235103.8)