TechnoTeam - Biomimetic Metrology Lenses for Near-Eye Displays: Diffraction-Limited AR/XR Quality Assurance
Wednesday, September 16, 2026 5:30 PM to 5:50 PM · 20 min. (UTC)
MicroLED/AR/VR Connect September 2026
TechBlick Event
Information
Near-eye displays (NEDs) for augmented and extended reality place stringent requirements on imaging luminance measurement devices (ILMDs) that go beyond the capabilities of standard commercial lenses. Key challenges include a physically defined compact entrance pupil, low veiling glare, diffraction-limited MTF performance, stable geometric distortion, and electronically controllable focus — all within mechanical dimensions compatible with the device under test.
To address these challenges, we previously introduced an NED lens concept based on a liquid-lens focusing mechanism that mimics the accommodation of the human eye. Unlike conventional mechanical focus approaches, this design preserves the entrance pupil position and geometric calibration during focusing. However, systematically demonstrating and comparing such properties across different lens designs requires a well-defined set of metrological performance metrics. In this paper, we propose such a framework and apply it to validate our liquid-lens concept.
Using this framework, we show that the lens design concept achieves near-diffraction-limited MTF at 2.5 mm entrance pupil across ±12.5° field of view, geometric distortion stability within 0.15 % from infinity to 5 diopter, and high focus repeatability validated under both static and repeated-refocus conditions. The proposed metrics enable traceable and comparable NED lens characterization from R&D through production-line quality assurance.
To address these challenges, we previously introduced an NED lens concept based on a liquid-lens focusing mechanism that mimics the accommodation of the human eye. Unlike conventional mechanical focus approaches, this design preserves the entrance pupil position and geometric calibration during focusing. However, systematically demonstrating and comparing such properties across different lens designs requires a well-defined set of metrological performance metrics. In this paper, we propose such a framework and apply it to validate our liquid-lens concept.
Using this framework, we show that the lens design concept achieves near-diffraction-limited MTF at 2.5 mm entrance pupil across ±12.5° field of view, geometric distortion stability within 0.15 % from infinity to 5 diopter, and high focus repeatability validated under both static and repeated-refocus conditions. The proposed metrics enable traceable and comparable NED lens characterization from R&D through production-line quality assurance.