Holographic near-eye display system based on double-convergence light Gerchberg-Saxton algorithm

Area of Science:

• Optics
• Computer Graphics
• Holography

Background:

• Holographic near-eye displays are crucial for augmented reality (AR).
• Reducing noise and improving image quality in computer-generated holograms (CGH) is a significant challenge.
• Existing methods often struggle with noise artifacts and limited field of view.

Purpose of the Study:

• To propose and verify a novel method for noise reduction in 3D holographic near-eye displays.
• To enhance the image quality and performance of phase-only CGH.
• To enable practical AR applications with improved 3D visualization.

Main Methods:

• Calculation of phase-only CGH using a modified Gerchberg-Saxton (GS) algorithm with double-convergence light.
• Introduction of two virtual convergence light phases: one as an initial value and another for phase modulation.
• Verification through both numerical simulations and experimental setups.

Main Results:

• Effective reduction of reconstruction noise in holographic displays.
• Achieved a field of view (FOV) of 40 degrees.
• Demonstrated 3D image reconstruction with a 180cm zooming range and continuous depth cues.
• Shortened experimental light path in a 4-f system.

Conclusions:

• The proposed double-convergence light GS algorithm effectively reduces noise in 3D holographic near-eye displays.
• The method enables high-quality 3D image reconstruction with a wide FOV and continuous depth.
• This technique offers a promising solution for future augmented reality realization.