NHK Science & Technology Research Laboratories (STRL), in collaboration with the Institute of Science Tokyo, has developed a new holographic production method that displays full-color 3D images through a transparent glass substrate.
The key feature of this technology is the coexistence of high transparency and vivid full-color 3D. The developed technique is an application of the "surface relief hologram" method. By suppressing light scattering (substrate cloudiness), which has been a traditional challenge, observers can clearly see the scenery through the glass while simultaneously enjoying high-definition 3D images floating in front.
[Background of Development] Surface relief holograms can display relatively large 3D still images over a wide viewing area, but previously faced challenges with "light scattering" and "complexity in achieving full color."
[Three Key Innovations] 1. High transparency via "shallow and smooth irregularities": By introducing a design method that also utilizes light "amplitude," the surface irregularities were reduced to a "shallow step" of approximately 0.5μm and a "smoothly continuous shape," maintaining transparency. 2. Successful "full-colorization" with a single hologram: Established a technology where red, green, and blue light are irradiated from different directions onto a single hologram to superimpose the 3D images. 3. "Improved image quality" with reduced computational load: Achieved higher image quality for 3D images while keeping computational load low.
[Prototype Specifications] - Ultra-high definition: Approximately 60 billion pixels in a 12cm square area. - High precision: Pixel spacing of 0.5μm. - Natural 3D effect: Unique holographic depth perception where the image changes smoothly with viewpoint movement.
[Future Outlook] Aiming for applications in future see-through 3D image display systems, such as product explanatory displays in retail windows or museum exhibits.
FACT BOX
- Source: PR TIMES
- Category: New Product