大口径哈特曼扩束系统的设计和研制

论述了用于哈特曼波前探测系统的透射式光学扩束器的研制.以三级像差理论为基础,分析了传统扩束器没能很好校正轴外像差的原因,在推导计算出初始结构参数后,通过ZEMAX光学设计软件,设计出轴上和轴外像差都得到很好校正的、大口径、大相对孔径、视场可增大的新型扩束器.并根据此哈特曼扩束系统的实际使用要求,考虑支撑受力与热变形等因素,为光学元件配以相应的结构设计,给出了具体的设计实例.介绍了加工过程与调整方法,提供了检验方式.最终验收得到波前PV值为λ/4.

Design and manufacture of Hartmann beam expander with wide aperture

The manufacture of transmission optics beam expander used in Hartmann wavefront detection system was introduced.Based on the third-order aberration theory,the reasons why off-axis aberrations can't be well corrected for traditional beam expander were analyzed. Submitting the primary parameters to optical design software of ZEMAX,a new type of beam expander which can perfectly correct the on-axis and off-axis aberrations is designed. It provided with wide aperture,large relative aperture and large field of vision.According to the actual demands of Hartmann beam expander,a concrete design example is presented,and corresponding mechanical design is matched for it.The ways of fabrication,adjusting and testing are introduced too.