A full-color reflection holographic optical element (HOE) with uniform diffraction efficiency, achieved via time-scheduled exposure, is proposed in which 660, 532, and 473 nm wavelengths are used for recording. To enhance the diffraction efficiency, the exposure energy of three wavelengths should be controlled to react uniformly in the photopolymer. The photopolymer’s optical characteristics present that the absorptance of the three wavelengths differs, moreover, the reactivity of the photopolymer to exposures is variant at the three wavelengths. The high-efficiency full-color HOE is implemented by determining the pre-exposure times of the three lasers for a set beam intensity. In order to verify the proposed method, we conduct repetitive optical experiments and analyze the results. Finally, a full-color reflection hologram is manufactured with an average efficiency of 61.6 % (standard deviation, 0.5) when the beam intensity of the three lasers is 0.4 mW/cm². The reconstructed images of the full-color hologram show good uniformity and color reproduction.

提出了一种通过定时曝光实现衍射效率均匀的全色反射全息光学元件 (HOE)，其中 660、532 和 473 nm 波长用于记录。为提高衍射效率，应控制三个波长的曝光能量，使其在光敏聚合物中反应均匀。光敏聚合物的光学特性表现为三个波长的吸收率不同，而且光敏聚合物对曝光的反应性在三个波长上是不同的。高效全彩 HOE 是通过确定三个激光器在设定光束强度下的预曝光时间来实现的。为了验证所提出的方法，我们进行了重复的光学实验并分析了结果。最后，² . 全彩全息图的重建图像显示出良好的均匀性和色彩还原性。