【摘要】 当空间光学遥感器所处的环境条件发生变化时,遥感器的焦平面会产生不同程度的偏移,为保证遥感器的成像质量,需要对偏移的焦平面进行校正,因此设计了一套柔性丝杆丝母与弹性导向机构相结合的机构来实现调焦的目的。该结构加工简单,不易发生卡滞现象,可实现对变化的焦面进行校正。从保证空间遥感器光学系统的成像质量出发,介绍了大口径反射光学系统调焦机构方案的选取及确定调焦机构的组成,并对该调焦机构在调焦范围内的调焦精度给出了初步分析。通过分析调焦精度可达±0.002 5 mm,可以满足设计指标的要求。更多还原

【Abstract】 The focus plane of a space remote sensor will decenter and defocus under the condition of space environment, which is changeable and complicated. It is necessary to compensate the defocusing effectively for the space remote sensor to improve the adaptabilities and to get a high quality image. A set of device which is made up of screw bolt & screw nut and flexible guide rail was designed. This set of device was easy to be made. Firstly, the project and the constitutes of focusing device were taken into account in the design. Secondly, the results of t analysis suggest the focusing device has a precision of ± 0.002 5 mm. Finally, experimental results demonstrate that the designs of screw bolt & screw nut are reasonable, which can meet the requirements of space applications.更多还原