Laser beam converter

The utility model provides a laser beam converter, which comprises a right-angle prism, a rhombic prism and a quarter-wave plate, and is characterized in that the right-angle prism comprises a first right-angle surface, a second right-angle surface and an inclined surface connected between the first right-angle surface and the second right-angle surface; the outer side of the first side surface is plated with a light splitting film which is used for transmitting P polarized light and reflecting S polarized light and then is connected with the inclined surface in a gluing manner; the quarter-wave plate is adhered to the outer side of the fourth side surface; and the included angle between the second right-angle surface and the inclined surface is 45 degrees. The laser beam converter can expand small light spots into large light spots. 本实用新型提供激光光束转化器，包括直角棱镜、斜方棱镜和四分之一波片，所述的直角棱镜包括第一直角面、第二直角面和连接于第一直角面和第二直角面之间的斜面，所述的第一侧面外侧镀制有透P偏振光且反S偏振光的分光膜之后与和斜面胶合连接，所述的四分之一波片粘合于所述的第四侧面外侧；所述的第二直角面与斜面的夹角为45°。本实用新型的激光光束转化器能将小光斑扩束成大光斑