Analysis of displayable depth range for retinal projection type super multi-view 3D head-mounted display using the time division projection optical system

摘要

We have previously proposed the retinal projection type super multi-view head-mounted display (HMD) using the timedivision projection optical system. By using the super multi-view HMD, it is possible to provide the viewer with the threedimensional(3D) image that induces the accommodation of a human eye naturally. In order to realize the super multi-viewmethod, it is necessary to simultaneously project multiple parallax images on the retina. However, when the parallaxbetween each parallax image is large and the corresponding pixels of each parallax image on the retina do not overlap eachother, the retinal image is observed as multiple projection images, therefore the accommodation cannot be induced. In thispaper, to estimate the displayable range of 3D image of the proposed super multi-view HMD, we revealed the relationshipbetween the number of parallax images and the displayable range of 3D image by using Gullstrand’s schematic eye modeland the analysis of the light intensity distributions of retinal images. In order to verify the displayable range of 3D image,we constructed the prototype HMD which projected five parallax images on the retina. We confirmed that the displayablerange of 3D image of the prototype HMD is from 900 mm to 2000 mm in front of human eye. By clarifying the relationshipbetween the number of parallax images and the displayable range of 3D image, it is possible to freely design the displayrange of 3D image of the retinal projection type super multi-view HMD.