【摘要】 在强激光波前测量像传递系统中,4-f光传输系统透镜之间装调过程产生的离焦量引入了一个相位调制。首先从实验上测量了像平面处波面横向剪切干涉图样,利用矩阵光学和Collins衍射公式推导出了离焦量和激光波面横向剪切干涉条纹之间的理论关系,并得到了在无离焦情况下激光传输的空域和频域方程。对实验测量得到的干涉条纹空间灰度曲线利用最小二乘法进行了余弦曲线拟合,得到干涉条纹空间尺度,利用理论关系计算得到了离焦量的数值,实现了对像传递系统装调过程的定量描述。更多还原

【Abstract】 In the wavefront measurement image-relaying system of high power laser,the phase modulate is produced by the laser converge point diverged from the lens focus in axis between two lens in 4-f system as the test system installed.First the interference pattern in the image plane of the 4-f system was measured using sheared interference laterally experiment.And the academic relationship between the off-focus values and interferential fringe interval using lateral sheared interference test method was deduced by the matrix optic theory and Collins diffraction equation.The laser transmission relationship in space and frequency are also derived in the condition of there having no off-values.The interference pattern gray-level curve was fitted using minimum mean-square error method,and the off-focus values was calculated by the interferential fringe interval which is received using curve fitting.The installing states of the test system are quantity expressed using the off-focus value.更多还原