抄録
Hologram is a record of an intensity of the diffraction wave from the object. Breakwater piles arranged in a straight line in coast are seemed to be the hologram. In order to find the simple calculating method of the diffraction sea wave of these piles, the superposition method is applied in this study. Many discussing points are remained, however the superposition method can be applied to be obtain the diffraction wave from the piles with arbitrary arrangement and diameter.
