液晶与显示2024，Vol.39Issue(7)：901-908,8.DOI:10.37188/CJLCD.2023-0242
深度线索增强的全息视网膜投影显示
Holographic retinal projection near-eye display with enhanced depth cues
摘要
Abstract
Holographic retinal projection display(RPD)is one of the near eye displays that can alleviate vergence accommodation conflict(VAC)due to its large depth of field.However,an excessive depth of field(DOF)will cause a loss of depth cues whose image clarity does not vary with depth.To solve this problem,a band-limited random phase based holographic RPD is proposed by using the band-limited random phase to control the light beam width into the viewer's pupil.And the depth of field will be limited by the controlled beam width.Thus,the depth cue of defocus can be enhanced.The process of the band-limited random phase based RPD can be divided into three steps:Firstly,the band-limited random phase is calculated by the light beam width into the pupil and the depth of the target image.Secondly,the target image is multiplied by the spherical wave phase and the band-limited random phase.The hologram is obtained by a one-step Fresnel diffraction from the processed complex amplitude distribution in the target image plane.Lastly,the spatial light modulator loaded with the hologram is illuminated by the collimated laser light source.And the reconstructed object light converges on the pupil which achieves the depth cue enhanced RPD.The experiment verifies that the band-limited random phase based holographic RPD has the advantages of low scattering and high reproduction quality.And it can flexibly control the DOF of the target image and provide the observer with depth cues of focus blur.关键词
3D显示/全息显示/视网膜投影显示/带限随机相位Key words
3D display/holographic display/retinal projection display/band-limited random phase分类
信息技术与安全科学引用本文复制引用
屠科锋,孙菲,王梓,吕国强,冯奇斌..深度线索增强的全息视网膜投影显示[J].液晶与显示,2024,39(7):901-908,8.基金项目
国家自然科学基金(No.62275071,No.61805065)Supported by National Natural Science Foundation of China(No.62275071,No.61805065) （No.62275071,No.61805065）
