Designing waveguides for lightweight AR glasses requires close coordination across teams and partners. This work sits at the intersection of optics, materials, and wearability, playing a key role in comfort and everyday use.
Below is a look at how the waveguide design process moves from early design choices to testing and refinement.
Step One: Ideation and Level-Setting
In this initial phase, our waveguide design team works closely with partners to understand the project’s goals, technical requirements, and specifications. At the same time, the design engineers collaborate with internal teams like mechanical engineering and fabrication to evaluate ideas early and confirm design feasibility.
During this phase, the engineers also learn about the partner’s wider AR glasses system. By better understanding the overall vision, the design team can align expectations, prioritize needs, and clarify how the waveguide must fit and perform alongside other hardware components. These preliminary discussions can uncover design or prototyping issues that could require costly changes later.
Step Two: Start Simulations and Predictive Design
With the project requirements and system context in place, the engineers use proprietary in-house simulation tools to model how light will pass through the waveguide structure and predict efficiency, uniformity, and color performance.
Because waveguides are so complex, commercial software cannot fully capture the necessary data or computational scale. We design custom simulation environments that allow the team to evaluate performance across a wide range of geometries and materials, including sub-wavelength features modeled with atomic-scale precision.
The tools also help the team stay aligned with fabrication realities while navigating complex tradeoffs. For example, increasing a projector’s aperture may improve clarity, but it will require additional waveguide mass to maintain optical performance.
As data and results come in, the team may loop back with partners to revisit design parameters or propose changes before physical builds begin.
Step Three: Confirmation Through Fabrication and Metrology
Once a design aligns with performance targets during simulation, prototype waveguides are fabricated using processes representative of actual production. Building physical components early on allows the team to confirm that predicted optical behavior translates consistently into manufactured waveguides.
Advanced metrology captures both physical structure and optical performance, including efficiency, uniformity, and image quality metrics. These measurements provide quantitative confirmation that modeled outcomes align with real-world results.
Our integrated approach of developing and testing in tandem allows us to reduce downstream risk and ensure performance consistency while designs advance towards high-volume production.
“Our in-house computational infrastructure is a competitive advantage, purpose-built to solve challenges beyond the capabilities of commercially available simulation tools.” — Joe Lowney, Magic Leap Senior Director, Eyepiece Engineering
Step Four: Moving Into Production
As waveguide designs progress beyond prototype validation, our focus shifts towards repeatability and manufacturability. Engineers work closely with fabrication teams to define process windows, understand tolerance sensitivities, and evaluate yield across production scenarios.
Because system context, simulation, and metrology have informed the design from the start, the resulting waveguide architectures are structured around real production conditions.. This foundation supports predictable optical performance in finished AR glasses and reduces risk as programs move into higher-volume manufacturing.
From concept discussions through validated prototypes, our waveguide design process is continuously evaluated against measurable performance outcomes. This continuity helps ensure finished components perform as intended for partners and fit within their unique systems.