Scalable screen-size enlargement by multi-channel viewing-zone scanning holography

Area of Science:

• Optics and Photonics
• Display Technology
• Holography

Background:

• Viewing-zone scanning holographic displays offer expanded screen and viewing zones.
• Existing methods face limitations in scalable screen size enlargement.
• Addressing these limitations is crucial for advancing holographic display technology.

Purpose of the Study:

• To propose and demonstrate a multi-channel viewing-zone scanning holographic display.
• To enable scalable enlargement of the screen size in holographic displays.
• To overcome the trade-off between screen size and viewing zone in current systems.

Main Methods:

• A multi-channel system with multiple projection systems and a planar scanner was developed.
• Each projection system creates an enlarged image from a MEMS spatial light modulator.
• Enlarged images are tiled on a planar scanner with a rotating off-axis lens and vertical diffuser.

Main Results:

• Demonstrated a scalable screen size enlargement method for holographic displays.
• Achieved a final screen size of 7.4 inches.
• Obtained a wide viewing-zone angle of 43.0 degrees.

Conclusions:

• The proposed multi-channel display effectively enables scalable screen size enlargement.
• The system successfully expands the viewing zone despite screen size increases.
• This approach offers a viable solution for large-format holographic displays.