| 摘要 |
PROBLEM TO BE SOLVED: To reduce or eliminate unnecessary wavelength components from laser light by an optical element. SOLUTION: The optical projection system is a laser generator for generating a laser beam containing red light emission and ultraviolet light emission. Also, the optical projection system has the laser generator where a laser includes reflection and output ends, and a wavelength dispersion element that is arranged at the output end and separates the red light emission from the ultraviolet one so that the red and ultraviolet emission advances in a different direction for reducing the presence of the red light emission in the laser beam. |
