【摘要】 在干涉条纹投射法测量的基础上,提出了利用正弦模板法测量图像传感器调制传递函数的新方法.通过将一定空间频率的正弦模板直接投射在图像传感器上,获得了同频率光强呈正弦分布的图像,通过计算求出图像传感器的调制传递函数.讨论了其具体实现方法,并用空间频率为50l/mm的计量光栅做了近似实验,采用了相应的数据处理方法,获得了较为满意的调制传递系数.更多还原

【Abstract】 Modulation transfer function is a powerful tool to evaluate the imaging performance of optics system.In order to expediently evaluate imaging quality of imaging sensor,a new method using sine mask to measure modulation transfer function is presented,which is based on the interferential fringe measurement method.The sine pattern generated by sine mask is directly projected on the imaging sensor,and the sine image is achieved.Then the modulation transfer function can be calculated.The approximate experiment is carried out,making use of rectangular grating which spatial frequency is 25 l/mm.The approximate modulation transfer coefficient is obtained with the corresponding data processing technology.The result indicates that such method is agreeable.更多还原