为使某飞行设备携带的小型红外相机在宽温度范围及恶劣动力学环境下能够良好成像，开展了红外相机光机结构设计。首先对光学系统及整机工作环境进行了分析，确定了光机结构采用全铝机身; 其次对核心部件——主镜的支撑结构进行了详细研究，分析说明了主镜传统支撑方式的局限性，确定了主镜与支撑采用一体化设计的方案，该设计同样适用于次镜; 接着根据相机尺寸选择了主次镜间支撑结构; 然后根据光学系统设计了合理的遮光罩; 最后，对相机过载适应性、温度适应性及模态进行了有限元分析，分析结果表明：该小型红外相机的光机结构能够满足设计指标要求。

In order to make small infrared camera carried by a flight equipment can be well in a wide temperature range and bad dynamic environment, opto-mechanical structure of camera was designed. Firstly, the optical system and working environment were analyzed, according to design experience of the similar products, all-aluminum body were used for the opto-mechanical structure; Secondly, the core component-primary mirror support structure was studied in detail. By reason of limitations of traditional primary mirror support structure, integrative design was used for primary mirror support structure. this design was equally applicable to secondary mirror. Thirdly, thin-wall canister was used for the support structure between primary and secondary mirrors according to size of camera. And then，rational baffle was designed according to the optical system. Lastly, overload adaptability, temperature adaptability and modes of camera were analyzed. Results show that opto-mechanical structure of small infrared camera meets design requirements.