点衍射干涉仪的一种新技巧可使劳仑斯·伯克利实验室X射线光学中心的研究人员在可见光到X射线波长的宽光谱范围里精确测量光学元件。对简单系统所作的试验已显示非常优良的可重夏性。在普通点衍射干涉仪中，针孔由于使相干照明衍射成球面参考波前（图1），消除了参考表面的需要 A new technique for point-diffraction interferometry allows researchers at Lawrence Berkeley Lab X-ray Center to accurately measure optical components over a wide spectral range from visible to X-ray wavelengths. Experiments on simple systems have shown very good re-hazy. In a normal point diffraction interferometer, pinholes eliminate the need for a reference surface by diffracting the coherent illumination into a spherical reference wavefront (Figure 1)