关键词: 计算机辅助装调, 装配过程, 光学系统机械结构, 装配工艺约束, 软件系统

Abstract: Mechanical structure and assembly process constraint was introduced in optics automatic design model, and a assembly process oriented computer aided alignment mathematical model of precision optical system was formulated. Moreover, the solution method to the model was also discussed. Taking optical design software ZEMAX as basic computation module, the data processing module, misadjustment solving module, optimizing variables selection module and scheme output module were developed independently, and then a integrated computer aided alignment software system oriented to assembly process was formulated. The products' assembly process model was constructed by integrating the structure design model and mapping data of products. Through analyzing the sensitivity and relativity of assembly process parameter, aided alignment optimization variables were determined by integrating mechanical structure and assembly process. In actual aligning process, the aberration was defined as merit function, so that the assembly process parameters with good sensitivity and complementary for misalignment were selected as optimization variables. By using computer's calculation function, the best aided alignment process parameter was automatically found out, which provided quantitative alignment support for technicians. This software was used to assembled an infrared detection optical system whose Modulation Transfer Function (MTF) increased from 44.9% to 64.1%, and illustrated the feasibility and effectiveness of this approach.

Key words: computer aided alignment, assembly process, optical system mechanical structure, assembly process constraint, software system