提出了一种改进的时分复用方法, 采用同步控制电路控制两段式彩色滤光轮的转动速度与全息图的切换速度一致, 通过两次切换全息图, 即可实现傅里叶计算全息图的真彩色显示。该方法通过缩放处理来消除再现像的色差, 并采用迭代傅里叶算法制作了两幅包含有彩色信息的合成相位全息图, 使记录着单一颜色场景信息的全息图再现时只占用空间光调制器(SLM)的1/2区域。此方法实现了白光LED真彩色全息显示, 减少了传统时分复用方法加载全息图的次数, 对SLM刷新率的要求也降低了1/3。实验验证了此方法的可行性。

An improved method of time division multiplexing is proposed. We adopt a synchronous control circuit to make the rotation speed of the two-section color-filter wheel in accordance with the speed of switching holograms and realize Fourier computer-generated hologram's real color display through switching the holograms two times. The chromatic aberration of reconstruction images is eliminated by scaling processing and two synthetic phase holograms which contain the color information with the iterative Fourier algorithm are made. All pieces of hologram which record monochromatic scene information are reconstructed by using a half area of the SLM. Finally, the white LED real color holographic display is realized with this method and the number of loading holograms in traditional time division multiplexing method is decreased together with 1/3 of the requirement on the refresh rate of spatial light modulator reduced. The feasibility of the method is experimentally verified.