恒星光干涉仪波前方向校正系统的研究

Research on correction system of wavefront direction used in stellar interferometer

利用波前方向校正技术实现两相干光束的平行性控制 ,进而保证干涉条纹可见度损失最小 ,是恒星光干涉仪中的关键技术之一。进行了波前方向校正系统的原理分析和设计探讨 ,详细讨论了该系统中的 80 98控制单元、高压驱动电源、摆镜结构设计及压电陶瓷堆 (PZT)的驱动机理 ,并介绍了用于测试摆镜响应频率等参数的高速

It is one of the key techniques in stellar interferometer,to have the parallel control of the coherent beams by means of correction technique of wavefront direction,and to keep the loss of the visibility of the interfering stripes minimum.In this paper,the principle and the design of the correction system of wavefront direction are described at first.Moreover,the 8098 control unit,the high voltage driver,the structure design of the tip tilt mirror and the driving mechanism of the piezoelectric transducer are discussed.Finally,the test method of correlation analysis based on high speed CCD camera which is applied to testing the frequency response of the tip tilt mirror and other parameters is introduced.