本文重点分析讨论激光发射光学系统的设计特点，如系统数值孔径的选择、放大率与折射率之间的关系、正负透镜间的间隔与折射率的关系以及折射率与剩余像差之间的关系问题．用其结论指导设计，设计出输出能量高和发散角小的激光发射光学系统。 This paper analyzes and discusses the design characteristics of laser emission optical system, such as the choice of numerical aperture, the relationship between magnification and refractive index, the relationship between the refractive index and the refractive index, and the relationship between refractive index and residual aberration Relationship problems. Using its conclusions to guide the design, a laser emission optical system with high output energy and small divergence angle was designed.