Φ0300激光扩束器光学系统设计

从三级像差理论出发，分析伽里略（Galilean）和开卜勒（Keplerian）两种类型扩束器的轴外像差没有得到很好校正的原因.通过合理的光路分析，设计出一种轴上和轴外像差都得到很好校正、大口径大相对孔径、视场可增大的、光学性能优于伽里略和开卜勒扩束器的新型扩束器.并给出了物镜通光口径为300 mm、物镜焦距为800 mm、视场为4 mrad、放大倍率为30倍、主工作波长为0.6328 μm的非球面扩束器光学系统结构参量，且进行了像质评价.调整此扩束器目镜组中各镜片的间隔以及物镜和目镜的间隔可以使该扩束器在三个波长使用.

Design of Optical System for Ф0300 Laser Beam Expender

Based on the third-order aberration theory,the problem that off-axis aberrations in the main types Galilean and Keplerian beam expanders can't be corrected is worked out. With reasonable analysis of optical path,a new type beam expander with wide aperture and bigger field angle and large relative aperture in which the on-axis and off-axis aberration are both perfectly corrected is designed. It has much better optical performance than the two classical types. An example is presented. The clear entrance of its objective is 300 mm and focal length is 800 mm,its magnitude ratio is 30 and the primary working wavelength is 0.6328 μm. The results of optical design have been given. When the distances among the lenses of eyepiece and the distance between the objective and eyepiece are adjusted reasonably,the beam expander can be used in three wavelengths.