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在大多数的工业射线检验时,射线源、试样和胶片之间不应存在相对运动。胶片相时于试样移动,使获得的射线照相图象模糊;而射线源相对于试样和胶片的运动,则相当于使用焦点尺寸大的射线源而使几何不清晰度增高。然而,在某些情况下通过射线源、试样和胶片之间的运动即运用“动态”射线照相技术会获得益处——经济上的或者可以得到其他方法所不能得到的信息。以下介绍这一技术的应用实例。
In most industrial radiographic tests there should be no relative movement between the source of radiation, the specimen and the film. The phase of the film moves over the sample, obscuring the radiographic image obtained; and the relative movement of the source relative to the sample and film corresponds to the use of a ray source with a large focal spot size for increased geometric unsharpness. In some cases, however, the movement of the specimen and the film through the radiation source benefits from the use of “dynamic” radiographic techniques - economically or with information not available from other methods. The following describes the application of this technology examples.