大口径精密光学调整架的优化设计

Optimization and test of optical precision mount with large aperture

针对大功率激光检测技术发展中精密光学调整架存在的刚度不足的问题,设计了一种适合装调大口径光学镜片的精密光学调整架结构,并建立其力学模型,分析其动力学性能,通过Ф420mm大口径球关节调整架结构俯仰模态理论的分析和实验测试数据之间对比,找出导致调整架结构谐振频率变差的原因。采用优化设计后的大口径调整架第一阶俯仰模态的频率为157.788Hz,能够很好满足在强振源下的工作需要。

Considering the natural frequency weakening of a high power laser＇s optical precision mount matching with large aperture, the paper states an optical precision mount with large aperture, with its mechanical model built and its dynamic abilities analyzed. By contrasting theoretical analysis and test data of the optical precision mount with a Ф420 mm mirror, the reasons for natural frequency weakening have been seeked. The optimized structure of the optical precision mount with large aperture has a first mode elastomer pitching swing frequency of 157. 788 Hz, which could meet the working condition under the intense vibra- tion.