大型反射式光学系统在很多领域有着重要应用，但由于大口径、长焦距的特征，其具有较高的光学敏感度，给系统加工、装调等环节带来极高的经济与时间成本。为解决大型光学系统高敏感度的问题，该项目将从“大型反射式光学系统敏感度数学理论模型研究”、“基于降敏机理的大型光学系统设计方法研究”与“具有低敏感度的大型光学系统的实现”等三个主要方面开展研究，寻找大型光学系统敏感度问题的内在规律、系统理论和数学模式的清晰阐述；应用新的设计方法与设计理念解决大型光学系统敏感度问题；研究建立较为完整的大型光学仪器光学系统低敏感度公差的分配原则与分配方法，最终从设计方法与过程实现上研究一种具有较低敏感度的大型反射式光学系统，旨在完成具备低敏感度的大型光学系统设计方法与可实现机理研究，该研究对一系列大型光学仪器具有重要的科学理论意义与现实应用价值。

The large-scale reflective optical system has a significant application in many fields. However its high optical sensitivity which caused by its characteristics of large aperture and long focal length will lead to the system need a high cost and a long time to accomplish the optical manufacturing and alignment process. To solve the problem of high optical sensitivity of the large-scale reflective optical system, this project will do research from three aspects: the research on the optical sensitivity mathematical theoretical model of the large-scale reflective optical system; the research on the design method of the large-scale optical system based on the desensitivity mechanism; the implementation method of the large-scale optical system with low sensitivity. We will explore the inherent law, system theory and clear mathematical model statement of the optical sensitivity of the large-scale reflective optical system; will solve the optical sensitivity problem in novel design method and ideal; will research and establish the low optical sensitivity tolerance distribution principle and method of the large-scale reflective optical system. Finally we will obtain a kind of large-scale optical system with low sensitivity by design method and process implementation research, and our research work aim to accomplish the research on the design method and realizability of the large-scale optical system with low sensitivity, and the research results will have scientific theory significance and practical application values for a series of large-scale optical instrument.