An international team of researchers from China and Singapore has developed a method for creating dynamic
Creating a dynamic holographic projectionusually involves the use of a spatial light modulator (SLM) to control the intensity of the light beam. But the quality of modern holograms is limited, since the existing SLM technology allows only a few images to be projected onto individual planes with low depth resolution.
Illustration of the new (a) and traditional (b) ways of creating holographic projections. Image: Lei Gong, University of Science and Technology of China
To overcome this problem, scientists combined SLM with a diffuser. This setup suppresses crosstalk between planes and uses light scattering and wavefront shaping.
To test the new method, the researchersused simulations to show that the device can create 3D reconstructions with much smaller depth spacing between planes. For example, they were able to project a 3D rocket model with 125 consecutive image planes at 0.96mm depth intervals in a single 1000×1000 pixel hologram.
Simulation of visualization capabilities using new technology. Image: Lei Gong, University of Science and Technology of China
To experimentally test the concept, scientistsbuilt a prototype 3D-SDH projector for creating dynamic holograms and compared it with a conventional modern installation for Fresnel 3D computer holography. The analysis showed that the new technology provides an improvement in axial resolution by more than three orders of magnitude compared to the analogue.
Read more:
A red halo flared up over Italy. Now its nature has been explained
Named a way to reduce appetite without surgery
Chia seed experiment confirms Alan Turing's famous mathematical model