高光譜影像可同時取得二維空間與一維光譜資訊，但傳統掃描式系統易受到量測時間與動態目標移動限制。本研究提出一種旋轉繞射光柵式影像切割器，利用不同光柵週期與旋轉角度，將 0.5 cm × 0.5 cm 輸入影像分割為五個區域，並於一階繞射方向完成空間重排與波長色散。設計工作波段為 400–700 nm，並利用嚴格耦合波分析與 Rayleigh–Sommerfeld 理論進行繞射效率及光場傳播模擬。模擬結果顯示，各區域可有效分離與重排，並可依繞射位置重建 405、533 與 632.8 nm 影像。實際製作之反射式元件蝕刻深度約 150 nm，632.8 nm 鄰近區域之一階繞射點間距為 8.3 mm，405 nm 與 632.8 nm 之色散距離為 36.7 mm，皆接近設計值。影像量測建立約 0.173 nm/pixel 之波長轉換係數，綠光與紅光之等效光譜展寬約為 33 nm 與 46 nm；依焦平面色散尺度與 MTF30 估算，可分辨波長間隔約為 3–4 nm。此外，紅色與綠色單通道影像經幾何校正、分區規一化與重新排列後，可進行初步空間重建。結果顯示，本研究之平面旋轉光柵結構具有整合影像切割、空間重排與波長色散之能力，具應用於快照式高光譜影像系統之潛力。;Hyperspectral imaging enables the simultaneous acquisition of two-dimensional spatial information and one-dimensional spectral information; however， conventional scanning-based systems are limited by acquisition time and target motion. This study proposes a rotated grating-based image slicer that employs gratings with different periods and rotation angles to divide a 0.5 cm × 0.5 cm input image into five regions and perform spatial rearrangement and wavelength dispersion in the first diffraction order. The designed operating wavelength range is 400–700 nm. Rigorous coupled-wave analysis and Rayleigh–Sommerfeld diffraction theory were used to evaluate the diffraction efficiency and optical-field propagation. Simulation results showed that the five regions could be effectively separated and rearranged， and images at 405 nm， 533 nm， and 632.8 nm could be reconstructed according to their diffraction positions. A reflective device was fabricated， with an etching depth of approximately 150 nm. Experimental measurements showed that the spacing between adjacent first-order diffraction spots at 632.8 nm was 8.3 mm， while the dispersion distance between 405 nm and 632.8 nm was 36.7 mm， both close to the designed values. In image measurements， a wavelength conversion coefficient of approximately 0.173 nm/pixel was obtained. The equivalent spectral broadenings of the green and red peaks were approximately 33 nm and 46 nm， respectively. Based on the focal-plane dispersion scale and an MTF30 of approximately 10 lp/mm， the estimated distinguishable wavelength interval was approximately 3–4 nm.
