测绘相机光学镜筒设计、加工及装配

测绘相机光学镜筒是保障测绘相机完成高精度测绘任务的重要部件，它的性能好坏直接影响测绘相机成像质量。为得到高质量成像相机，本文从材料选取、结构形式的确定和性能分析等方面详细阐述了测绘相机光学镜筒的设计过程。通过分析比较，最终选取铸钛合金ZTC4作为镜筒的材料，采用单镜组加筋壳结构的组合形式，并通过PATRAN/NASTRAN软件对主镜筒装配体的静力学和动力学分析得到具有很好整体性能的光机结构；同时给出了形位公差要求、拟定了严格的薄壁壳体的加工方法，并论述了单镜组和主镜筒整体装配的过程。

Design, manufacturing and assembly for mirror lens of a mapping camera

For purposes of designing a mapping camera with high image quality for stereoscopic mapping task,the design,manufacturing and assembly for the lens of a mapping camera are investigated.the design of the lens is issued from material choice,structure decision,performance analysis,and so on.Then,the processing methods for thin shell supporting structure of the lens are discussed.Finally,the assembly process of single lens unit and primary lens is introduced as well.After comparison,ZTC4 is selected as the material for lens tube,and a single lens unit and a thin shell are adopted to a combination format.Analysis results with PATRAN/NASTRAN indicate that the lens shows a good mechanical intensity and stiffness and can satisfy the requirement of structure of single lens.The thin shell is gained through casting and turning precisely,and the co-axiality of column in orientation ladders is 0.01 mm.During the assembly of lens,it is very important to keep no deformation,to control a air space accurately and to position a high precision center for assembly.The tested result shows that the optical transfer function of single lens can reach to 0.43(77 lp/mm),which can meet the requirements of precision for a mapping camera.