雷射光束掃描成像系統(laser beam scanning, LBS)具有體積小、光路架構簡潔及全彩輸出等特性，適合應用於微型投影與近眼顯示系統。然而LBS投影機與後續光學系統整合時，仍需額外配置光學元件進行光束偏折與光場調整，為縮減整體光路所需空間，本論文設計一介電質超穎介面，用於調制LBS投影機所輸出之紅、綠、藍三色光場。
本論文針對443.75 nm、520 nm及638.5 nm三個工作波長，利用二氧化鈦各向異性奈米結構之幾何相位進行光場調制。根據LBS投影光束於超穎介面不同位置之入射方向，計算不同波長之入射光與目標出射光之動量差，進而建立三個波長所需之相位分布，藉由同時控制三色掃描光束之傳播方向與波前狀態，可使投影光場朝後續光學系統所需之方向傳遞，作為微型投影與近眼顯示系統中光束導引及光場調整之平面光學元件
首先進行單元結構與整體相位分布之數值模擬，接著利用電子束微影與乾式蝕刻製程完成樣品製作，並透過三色雷射與LBS投影影像量測驗證其光學特性。模擬結果顯示，依照三個工作波長於不同入射位置下所形成之主要光點皆接近理論位置，驗證了設計之可行性，並於實際量測所得之藍光、綠光與紅光偏折角度分別為29.96°、29.99°及30.05°，皆與30°之設計目標相符。進一步以LBS投影機進行量測，紅、綠、藍單色影像與全彩影像經超穎介面調制及透鏡收斂後，皆可保留可辨識之影像內容。結果顯示所設計之超穎介面具有三色光束方向調控與影像資訊傳遞能力，展示其作為超穎介面對LBS光場調制之可行性。

Laser beam scanning(LBS)projection systems feature compact size, simple optical architecture, and full-color output, making them attractive for miniature projection and near-eye display applications. However, their output light fields exhibit position-dependent propagation directions and asymmetric divergence, and additional optical components are generally required for beam steering and light-field adjustment.
In this work, we develop a dielectric metasurface to modulate the RGB light fields emitted from an LBS projector at wavelengths of 443.75, 520, and 638.5 nm. The required phase distributions are derived from the momentum differences between the measured incident directions and a target output angle of 30°, and are implemented using anisotropic titanium dioxide nanostructures based on the Pancharatnam–Berry phase. The measured deflection angles of the blue, green, and red light are 29.96°,29.99° and 30.05°, respectively. Monochromatic and full-color images remain recognizable after metasurface modulation and lens reconvergence. Our work demonstrates compact RGB beam-direction control and image transmission for LBS projection systems.

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