Pi Dapu, Wang Jie, Liu Juan, Li Jingnan, Sun Yutong, Yang Yan, Zhao Weirui, Wang Yongtian
Opt Lett. 2022 Sep 1;47(17):4379-4382. doi: 10.1364/OL.469463.
In this Letter, we introduce a multiplexing encoding method with a bandwidth constraint strategy to realize a color dynamic holographic display based on complex amplitude modulation (CAM). The method first uses the angular spectrum method (ASM) with a bandwidth constraint strategy to calculate the diffracted wavefronts of red, green, and blue channels. Then the diffracted wavefronts of three channels are synthesized into a color-multiplexed hologram (CMH) based on the double-phase method after they interfere with off-axis reference lights. The color 3D objects can be reconstructed when the combination of red, green, and blue lights is used to illuminate the double-phase CMH, and a 4f system with a slit filter is introduced to extract the desired spectrums. Numerical simulations and optical experiments are performed to verify the effectiveness of the proposed method and the results show that it can achieve a color holographic display with high quality. Our proposal is simple and fast, and the display system is compact. It is expected that our proposed method could in future be widely used in the holographic field.
在本信函中，我们介绍一种具有带宽约束策略的复用编码方法，以基于复振幅调制（CAM）实现彩色动态全息显示。该方法首先使用具有带宽约束策略的角谱方法（ASM）来计算红、绿、蓝通道的衍射波前。然后，三个通道的衍射波前在与离轴参考光干涉后，基于双相位方法合成彩色复用全息图（CMH）。当使用红、绿、蓝光的组合来照明双相位CMH时，可以重建彩色3D物体，并引入带有狭缝滤波器的4f系统来提取所需光谱。进行了数值模拟和光学实验以验证所提方法的有效性，结果表明它可以实现高质量的彩色全息显示。我们的方案简单快速，且显示系统紧凑。预计我们所提方法未来可在全息领域得到广泛应用。
