恒星干涉仪中的高速倾斜镜应用研究

发布时间：2018-02-24 14:26

本文关键词： 大气效应仪器干涉仪技术干涉技术图像处理恒星成像　出处：《天文学报》2017年04期 　论文类型：期刊论文

【摘要】：在恒星干涉仪中,高速倾斜镜(Fast-steering mirror,FSM)因分辨率高、响应频率快等特点被广泛应用于校正大气湍流、仪器内部振动等引起的波前倾斜.一方面,针对倾斜镜本身在加工、装调中引入的镜面与触动器偏转轴不共面等误差进行系统分析,通过数值方法研究了上述因素在倾斜镜工作时产生的附加光程差(Optical Path Difference,OPD),并讨论了该光程差对恒星干涉仪条纹跟踪精度的影响;另一方面,两臂光束之间的平行度误差是造成干涉条纹可见度损失的主要因素之一,通过分析大气扰动引起的波前倾斜对条纹可见度的影响,提出了一种基于单一阵列探测器、简单高效的星光平行度实时校正方案,并结合室内实验论证了该方案的可行性.实验结果表明:经高速倾斜镜校正后的星光方向平行度初步满足了恒星干涉仪系统对波前倾斜的需求.
[Abstract]:In the star interferometer, the high speed tilting mirror Fast-steering mirror FSM is widely used to correct the wavefront tilt caused by atmospheric turbulence and internal vibration due to its high resolution and fast response frequency. The errors such as the misalignment of the mirror surface and the tilting axis of the actuator are systematically analyzed. The optical Path difference caused by the above factors is studied numerically, and the influence of the optical path difference on the tracking accuracy of star interferometer is discussed. The parallelism error between two arms beams is one of the main factors that cause the visibility loss of interference fringes. By analyzing the influence of wavefront tilt caused by atmospheric disturbance on the fringe visibility, a single array detector is proposed. Simple and efficient real-time correction scheme for starlight parallelism, The experimental results show that the parallelism of star direction corrected by high speed tilt mirror can meet the requirement of wavefront tilt of star interferometer system.
【作者单位】：中国科学院国家天文台南京天文光学技术研究所;中国科学院天文光学技术重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(11273038) 中国科学院先导B项目(XDB09040104)资助
【分类号】：P111.47

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