Augmented reality display based on photo-thermo-refractive glass planar waveguide

Area of Science:

• Optics
• Materials Science
• Computer Science

Background:

• Augmented reality (AR) displays require efficient and compact optical systems for image projection.
• Planar waveguides offer a promising platform for integrating optical components.
• Volume Bragg gratings (VBGs) are key elements for light manipulation in optical systems.

Purpose of the Study:

• To demonstrate an AR display utilizing a photo-thermo-refractive glass waveguide.
• To integrate multiplexed VBGs for in/out-coupling and image transmission.
• To assess the performance and limitations of the developed AR display prototype.

Main Methods:

• Fabrication of a planar waveguide in photo-thermo-refractive glass.
• Monolithic integration of multiplexed VBGs with the waveguide.
• Design and calculation of VBG configurations.
• Simulation and implementation of optical replication for VBG manufacturing.

Main Results:

• Successful demonstration of an AR display prototype.
• Efficient in/out-coupling and image transmission achieved via integrated VBGs.
• The prototype's field of view was limited by the projection system.
• Potential for expanding the field of view beyond 50 degrees was identified.

Conclusions:

• Photo-thermo-refractive glass waveguides integrated with multiplexed VBGs are a viable technology for AR displays.
• The monolithic integration approach simplifies the optical system.
• Further development of the projection system can enhance the field of view for improved AR experiences.