本論文將數位微陣鏡元件 (digital micromirror device，DMD) 應用於數位光學相位共軛 (digital optical phase conjugator，DOPC) 投影系統。利用 DOPC 系統抑制散射能力，將牆面前之聚焦光點重建，配合 DMD 的高切換速率，使重建光點形成 3D 立體實像。在此系統中使用費奈爾反射鏡增加系統準確因子 (system fidelity)，進而提高投影系統之效率。接著我們利用考量系統準確因子之峰值與背景雜訊比 (peak to background ratio，PBR) 與實驗結果做比較，再由比較結果中提出系統之極限。最後我們利用此系統將英文字母投影至 1mm×1mm×20mm 空間中，展示系統結果，並整理此系統極限，將其結果與 LC-SLM 調製的 DOPC 投影系統做比較。;In this thesis, the digital micro-mirror device (DMD) is applied to digital optical phase conjugator (DOPC) projection system. DOPC projection system based on DMD have turbidity suppression and high switching rate, so we can reconstruct focus point in front of the wall and form 3D real image. We improve system efficiency by using Fresnel reflect mirror to increase system fidelity. We present the limit of the system by experiment result and theory which is including system fidelity and PBR. In order to show the result, we project symbol to free space which area is 1mm×1mm×20mm. Finally, we compare limit of DOPC projection system based on DMD or LC-SLM.
