一种大型望远系统波前检测的方法

A wave-front measuring method for large scale telescope system

对传统S-H波前检测方法进行了改进的基础上,设计了一套适应于大型望远系统的波前检测方案。利用五角棱镜光束转向系统形成大型望远系统各子孔径准参考光束,实现依次扫描各子孔径;并用改进的S-H波前传感器实现依次探测各子孔径的波前。理论分析证明了由五角棱镜的制造误差和运动误差引起的波前倾斜误差在微变情况下,可通过波前修正方法予以修正,可有效地再现出望远系统自身波前误差。该方案可适用于大口径望远系统的波前检测。

Based on the traditional Shark-Hartmann wave-front measurement, a wave-front measuring method suitable for large scale telescope system was proposed. A set of pentagonal prism beam turning devices were introduced to transfer quasi-reference beam to scan every sub-aperture, and an improved S-H sensor was used to measure the wave-front of every sub-aperture. The wave-front measuring errors, which were induced by the manufacturing and kinetic errors of pentagonal prism, were theoretically analyzed and proved to be correct by a wave-front compensation method. The errors of self-wavefront of large scale telescope was reproduced availably, The method can be applied to measuring the wave-front of large scale telescope,