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要观察相位物体,通常是用相差显微镜和微分干涉显微镜等仪器。以前的这些方法虽然把物体的相位分布变换成像分布实现了可视化,但由于得到的图像强度分布不能进行物体相位分布的定量评价,不仅如此,在某些情况下,在物体上的强度分布与相位分布也无法区别。作者着眼于光的传播受相应物质影响这一事实,提出了即使不用特殊的光学装置也能对物体的相位分布进行定量评价的方法。这种方法是对焦点附近光传播的离
To observe the phase object, usually with a phase contrast microscope and differential interference microscope and other instruments. In the past, although the method of transforming the phase distribution of an object into an image distribution can be visualized, the intensity distribution and the phase of the object can not be quantitatively evaluated because of the intensity distribution of the obtained image. In addition, in some cases, Distribution can not be distinguished. In view of the fact that light is affected by the corresponding substances, the author proposes a method of quantitatively evaluating the phase distribution of an object even without a special optical device. This method is to focus on the light near the distance