适应大温差变化的多光轴一致性测试系统

为满足在野外大温差环境下能够检测光电设备的光轴平行性,基于卡塞格林平行光管结构,设计研究了一种能够在-40℃~+55℃环境温度下稳定工作的多光轴一致性检测系统。系统考虑到宽光谱的检测需求,可以满足0.4μm~12μm的光谱覆盖范围。基于对系统温度稳定性的考虑,对系统的主体工作结构进行无热化设计,并利用不同机械材料匹配的方式对平行光管进行补偿,保证在不同温度情况下系统光束出射平行度偏差始终小于4"。实验结果表明系统具有良好的温度稳定性。

Multi-axis Parallelism Measuring System with Temperature Insensitivity

In order to detect the parallelism of optical axis of photoelectric device accurately in large temperature differ-ence environment, we design a measuring system based on Cassegrain structure. The system is adapt to the tempera-ture range from -40℃ to +55℃ with the spectral bandwidth from 0.4μm to 12μm. According to the demand of temper-ature stability, the athermal structure of the system is analyzed and the compensation by different mechanical materials is carried out. The beam parallel deviation is less than 4" in different temperrature. The experimental result shows that the system has good temperature stability.