Holographic displays*1 reproduce lifelike three-dimensional (3D) images without wearing special glasses. To widen the viewing zone angle*2 of holographic displays, STRL has been developing a high-density Magneto-Optical Spatial Light Modulators (MOSLM)*3 with submicron scale small-pixels. We have successfully demonstrated 3D holographic images with wide viewing zone angle using the MOSLM.
High-density MOSLM with pixel pitch of 1 μm
The viewing zone angle of a holographic display depends on the pixel pitch. With a conventional low-density SLM, images could only be viewed within a narrow range. To widen the viewing zone angle of holographic displays, STRL has developed a MOSLM (10K×5K pixels) using Current Induced Domain Wall Motion (CIDWM)*4 with the world’s smallest pixel size (1 μm×4 μm).
Display of 3D images with wide viewing zone angle
The MOSLM developed by STRL can successfully display 3D images with a horizontal viewing zone angle of 30 degrees. A rewritable wide viewing zone angle holographic display has been demonstrated. As the structure of this MOSLM is suitable for higher density, it should be possible to widen the viewing angle further by reducing the pixel pitch.
STRL will work on developing elemental technologies for a high-density SLM that can achieve high diffraction efficiency and display high-speed moving images by around 2025. The quality of reconstructed images will be improved and moving images will be displayed in color by around 2030.