Split Lohmann computer holography: fast generation of 3D hologram in single-step diffraction calculation  

作　　者：Chenliang Chang Xian Ding Di Wang Zhizhou Ren Bo Dai Qi Wang Songlin Zhuang Dawei Zhang 

机构地区：[1]University of Shanghai for Science and Technology,School of Optical-Electrical and Computer Engineering,Engineering Research Center of Optical Instrument and System,Ministry of Education and Shanghai Key Laboratory of Modern Optics System,Shanghai,China [2]Beihang University,School of Instrumentation and Optoelectronic Engineering,Beijing,China

出　　处：《Advanced Photonics Nexus》2024年第3期1-13,共13页先进光子学通讯（英文）

基　　金：supported by the National Special Fund for the Development of Major Research Equipment and Instrument(Grant No.2020YFF01014503);the ShanghaiMunicipal Science and Technology Major Project(Grant No.22ZR1473100);the Youth Innovation Promotion Association,Chinese Academy of Sciences(Grant No.2022232);and the National Key Research and Development Program of China(Grant No.2022YFB2804602).

摘　　要：Holographic display stands as a prominent approach for achieving lifelike three-dimensional(3D)reproductions with continuous depth sensation.However,the generation of a computer-generated hologram(CGH)always relies on the repetitive computation of diffraction propagation from point-cloud or multiple depthsliced planar images,which inevitably leads to an increase in computational complexity,making real-time CGH generation impractical.Here,we report a new CGH generation algorithm capable of rapidly synthesizing a 3D hologram in only one-step backward propagation calculation in a novel split Lohmann lens-based diffraction model.By introducing an extra predesigned virtual digital phase modulation of multifocal split Lohmann lens in such a diffraction model,the generated CGH appears to reconstruct 3D scenes with accurate accommodation abilities across the display contents.Compared with the conventional layer-based method,the computation speed of the proposed method is independent of the quantized layer numbers,and therefore can achieve real-time computation speed with a very dense of depth sampling.Both simulation and experimental results validate the proposed method.

关 键 词：computer holography holographic display diffraction calculation. 

分 类 号：O43[机械工程—光学工程]