偏光3D显示器对视功能影响的研究

目的:研究不同眼位患者在观看偏光3D影像0.5 h和1 h后视功能参数的改变,探讨参数改变与视疲劳的关系。方法:选取志愿者51名,根据近距隐斜量分为3组:正位组、外隐斜组、内隐斜组。分别测量观看3D影像前、0.5 h和1 h的视功能参数,使用视疲劳调查问卷进行视疲劳程度统计。结果:按眼位分,正位组和内隐斜组观看3D影像0.5 h和1 h相比于观看前调节反应增大,差异有统计学意义(P=0.004、P<0.001,P<0.001、P=0.001)。内隐斜组观看0.5 h和1 h立体视锐度值小于观看前,差异有统计学意义(P=0.02、P=0.03)。按时间分,观看0.5 h和1 h,正位组和内隐斜组注视视差均小于外隐斜组,差异均有统计学意义(P=0.03、P<0.001,P=0.02、P=0.007)。观看1 h后,正位组和内隐斜组的注视视差斜率绝对值均小于外隐斜组,差异有统计学意义(P=0.007、P=0.013)。观看0.5 h,外隐斜组视疲劳得分大于正位组和内隐斜组,差异均有统计学意义(P=0.034、P=0.015)。结论:不同眼位患者观看3D影像后,立体视锐度有所提升;调节反应增大、注视视差变大及其斜率的改变影响了双眼协调运动,最终导致视疲劳。

360° light field 3D display system based on a triplet lenses array and holographic functional screen

A 360° light field 3D display system is presented, which consists of a liquid crystal display, a novel triplet lenses array, and a holographic functional screen （HFS）. The mapping relationship among pixels, 3D objects, and view- ing positions are investigated. The aberration analysis of the single lens is carried out both in the simulation and the experiment, which shows that it cannot provide an excellent 3D image to the viewers. In order to suppress the aberrations, ＂the primary aberration theory＂ and ＂the damped least-squares method＂ are used for optical analysis and lens design. A 3D image with aberration correction can be viewed around the proposed display system.