Optical simulation of field-of-view distortion in see-through lightguide based on volume holographic optical elements

Area of Science:

• Optics and Photonics
• Display Technology
• Optical Engineering

Background:

• Volume holographic optical elements (VHOEs) are key components in advanced display systems.
• Understanding the interplay between lightguide geometry and VHOE performance is critical for image fidelity.
• Existing research often lacks precise simulation of these geometric effects.

Purpose of the Study:

• To develop a precise simulation platform for analyzing lightguide geometry effects on VHOEs.
• To quantify the impact of lightguide thickness and length on the horizontal field of view (HFOV) and vertical field of view (VFOV).
• To provide theoretical clarification and experimental validation of observed distortions.

Main Methods:

• Development of a simulation platform using practical optical parameters and physical configurations.
• Investigating the relationship between lightguide dimensions (thickness, length) and field of view distortions.
• Comparing simulation results with experimental data for validation.

Main Results:

• Lightguide thickness directly influences HFOV, with thicker designs potentially causing HFOV discontinuity.
• Excessive lightguide length leads to VFOV shrinkage and potential asymmetry.
• Simulated distortions closely matched experimental observations, confirming the model's accuracy.

Conclusions:

• Precise lightguide geometry is essential for minimizing image distortion in VHOE-integrated displays.
• The simulation platform provides valuable insights for optimizing lightguide design.
• Findings contribute to the advancement of head-up displays (HUDs) and near-eye display technologies.