PROBLEM TO BE SOLVED: To provide a diffraction-grating-movable-type phase photographing apparatus that has a simple structure and can reduce the manufacturing cost, and provide a phase photographing apparatus using a restoring method including a relaxation factor.SOLUTION: A diffraction grating is moved and a plurality of interference fringe images are photographed. The present invention provides a method of restoring a phase shift by introducing a relaxation factor considering the movement position of the diffraction grating into each of the photographed images, and of determining a value of the correlation relaxation factor. The present invention provides a phase photographing apparatus using the method.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】構造が簡単で製造コスト低減が可能な回折格子移動型位相撮影装置を提案し、緩和因子を導入した復元法を利用した位相撮影装置を提供する。【解決手段】回折格子を移動して撮影する複数の干渉縞画像に対して、回折格子の移動位置を考慮した緩和因子を各撮影画像に導入して位相シフトの復元を行い、相関緩和因子の値を求める方法と前記の方法を利用した位相撮影装置を提案する。【選択図】図1
