Fu Qiang, Yan Lei, Tan Shuanglong, Liu Yang, Wang Lingjie
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
University of Chinese Academy of Sciences, Beijing 101408, China.
Micromachines (Basel). 2024 Jan 12;15(1):0. doi: 10.3390/mi15010128.
To build a long-wave infrared catadioptric optical system for deep space low-temperature target detection with a lightweight and wide field of view, this work conducted a study that encompasses a local cooling optical system, topology optimization-based metal mirror design, and additive manufacturing. First, a compact catadioptric optical system with local cooling was designed. This system features a 55 mm aperture, a 110 mm focal length, and a 4-degree by 4-degree field of view. Secondly, we applied the principles of topology optimization to design the primary mirror assembly, the secondary mirror assembly, and the connecting baffle. The third and fourth modes achieved a resonance frequency of 1213.7 Hz. Then, we manufactured the mirror assemblies using additive manufacturing and single-point diamond turning, followed by the centering assembly method to complete the optical assembly. Lastly, we conducted performance testing on the system, with the test results revealing that the modulation transfer function (MTF) curves of the optical system reached the diffraction limit across the entire field of view. Remarkably, the system's weight was reduced to a mere 96.04 g. The use of additive manufacturing proves to be an effective means of enhancing optical system performance.
为构建用于深空低温目标探测的具有轻量化和宽视场的长波红外折反射光学系统，本工作开展了一项涵盖局部冷却光学系统、基于拓扑优化的金属镜设计以及增材制造的研究。首先，设计了一种具有局部冷却功能的紧凑型折反射光学系统。该系统的特点是孔径为55毫米，焦距为110毫米，视场为4度×4度。其次，应用拓扑优化原理设计了主镜组件、副镜组件和连接遮光罩。第三和第四阶模态的共振频率达到了1213.7赫兹。然后，使用增材制造和单点金刚石车削制造镜组件，接着采用定心装配方法完成光学装配。最后，对该系统进行了性能测试，测试结果表明光学系统的调制传递函数（MTF）曲线在整个视场内均达到了衍射极限。值得注意的是，该系统的重量减轻至仅96.04克。增材制造的应用被证明是提高光学系统性能的有效手段。
