“In short, cross talk is the mutual-intensity interference between images projected at different depths,” he says.Įven though a projection is broken into separate image fields, interference can occur when light from one plane filters through into the others.

However increasing the plane density can also generate interference in the form of cross talk, Gong says. Stacking these image planes close together can create high-density images. Large-scale 3D holograms are typically created by scattering a projection across many planes to create a stack of pixels that when viewed together give the impression of a virtual, 3D object. “The new method might benefit real-life applications such as 3D printing, optical encryption, imaging and sensing, and more,” he continues. Gong and colleagues call this method 3D scattering-assisted dynamic holography. “Our work presents a new paradigm towards realistic 3D holograms that can deliver an exceptional representation of the 3D world around us,” says senior author on the paper, Lei Gong, an associate professor of optical engineering at the University of Science and Technology of China. Now, a research team from the University of Science and Technology of China and the National University of Singapore have reported a new technique to solve both of these problems at once to create ultrahigh-density 3D holograms. One of the innovations the team developed is a modulating medium for projecting images-similar to what LCD display screens use. Low axial resolution-which is equivalent to the distance from the nearest image plane in focus to the farthest field in focus, also called depth of field-and high levels of crosstalk interference between projection planes have long prevented 3D holograms from achieving finer depth control.

Today this technology is advanced enough to resurrect pop stars, like Whitney Houston, for convincing stage shows, but the depth of these projections mean that the hologram experience lacks convincing three-dimensionality. Much like flying cars or warp-speed travel, holograms are a kind of technology that was overpromised by science fiction but underdelivered in reality. The researchers, based in China and Singapore, exerted a new level of control over the hologram projection’s scattering medium. Actual 3D holograms may be achievable in a projected medium that aren’t blurry or fuzzy but still appear to have real depth, according to a new study.

3d hologramm projektor test