在本論文中，探討體積全像片位移後所導致的繞射訊號快速衰減，考慮如何做位移補償以回復原訂儲存點的訊號正確讀取。在理論上利用純量繞射理論與相位疊加法為基礎，推導出當記錄介質在不同位移量對繞射訊號強度之關係式，由此獲得調整讀取光入射角度以補償修正紀錄介質位移的方法。此外，由於訊號隨位移量增加而衰減過快，故將參考光由平面波改為球面波，使得參考光於經過物鏡後之聚焦深度改變，進而改變被紀錄全像之光柵密度，故能改善訊號讀取時的位移容忍度。最後，我們根據同軸全像儲存模型進行碟片位移補償模擬與實驗，驗證此位移補償方法之可行性。

In this thesis, we study a new scheme to compensate the position error so that the reading of the holographic disc can be on the correct position and to prevent from large decay of the signal. In theory, based on VOHIL model, we build a formula to describe diffraction intensity with respect to the lateral shift of the disc and then obtain the compensation with angle tuning. Besides, owing to dramatic decay of the signal upon disc shift, we use a spherical wave to replace the original lane wave. The spherical wave enables more phase modulation. We can adjust the focal depth of the reference across the holographic media, and equivalently adjust the fringe density so that the position tolerance can be enlarged. Finally, the corresponding experiments have been done to verify the proposed scheme, and to figure the potential in practice.

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