焦面二维精密调整机构研究

摘要

According to the requirements of adjusting focus and drift angle for the large diameter,long focal length and high resolution space optical remote sensor, a two-dimensional precision adjustment mechanism is proposed for focal plane based on the high rigidity, strength ball spline structure and the high precision ball screw structure, which is able to realize the purpose of adjusting the focus and drift angle. This two-dimensional precision adjustment mechanism for focal plane not only has the advantage of compact structure, taking up small space and light quality, but also has enough strength and stiffness and excellent self-locking and resistance to cold welding properties. The quality of this structure is 5.5 kg. Its focusing range and resolution are ±2 mm and 0.17μm, respectively. The adjustable range for drift angle is ±5, while resolution is better than 0.000 2″. The test result shows that all the parameters meet the requirements. So it’s suitable for application on the large diameter, long focal length and high resolution space optical remote sensor.%针对大口径、长焦距的高分辨力空间光学遥感器对调焦和调偏流的要求，本文基于高刚度、高强度滚珠花键结构和高精度滚珠丝杠结构，提出了一种焦面二维精密调整机构，能够实现调焦和调偏流目的。焦面二维精密调整机构结构紧凑，占用空间小，质量轻，并具有足够的强度、刚度、良好的自锁性能及抗冷焊性能。机构的质量为5.5 kg，调焦范围为±2 mm，调焦分辨力为0.17μm，调偏流范围为±5°，调偏流分辨力优于0.0002″，对机构进行精度检测，各项参数均满足指标要求，适合在大口径、长焦距的高分辨力空间光学遥感器空间光学遥感器中使用。