Development of an Excellent Depth Feeling Wallpaper Screen Based on a New Theory of an Optical Biomimetic Model of Human Skin

抄録

When we consider viewing the surface of human skin, the skin gives us a sense of natural depth, while, in contrast, the surface of a plastic does not. It is sure that the feeling of natural depth from human skin does not come from binocular disparity, because we can easily sense the natural depth of the skin, even when using only one eye. In our research program, learning from the structure of human skin, we fabricated screens which consist of multilayers made of translucent sheets coated with TiO₂ nanoparticles. It seems that these screens appear to exhibit Mie scattering which has strong backward scattering relative to forward scattering. Therefore, analogous images can be projected on the screens behind the original images without losing their clearness. The feeling of natural depth from our screen can be considered to come from the multiply-observed images produced by phase differences due to the translucent multi layers and the reflection/diffusion differences of light depending on its wavelength. We also discuss the reflection/diffusion properties using color laser and black and colormatrixes. Red ray can reflect many times between the multilayers and resolution of the red image become low. When insert a black matrix among the multilayers, the matrix control the optical properties, and the resolution can be improved. Additionally, in the case of our screens, as well as human skin, we can sense the feeling of depth with one eye. Our screens can be applied to wallpaper or projection screens for events, since they are simple, energy free, and applicable to large area.