New metrology system at Photonics West to test VR display quality

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Credit: Radiant

Radiant Vision Systems will introduce a patent-pending optical measurement system for ensuring the visual quality of XR (augmented, virtual, and mixed reality) displays at Photonics West this week. 

Radiant will present a paper, titled 'Novel modular optical system for simplified development of AR, VR display measurement solutions,' at the event that details a new optical design that simplifies the process of building imaging systems for near-eye display (NED) metrology.

For AR, VR, and MR (XR) devices, display quality is determined by user perception of the display as observed within the parameters of a headset design. Measurement systems used to evaluate XR display quality emulate the viewing conditions of the user by applying optics that position the entrance pupil (aperture) of an imaging lens at the eye position within the headset.

While this viewing position is common across XR displays, there is no standard guiding XR device design. Display technologies, projection methods, and headset form factors continue to evolve. New display measurement equipment must be developed continuously to address the unique viewing conditions of new devices - different angular fields of view (FOV), resolutions, focus ranges, and hardware designs.

To address each set of variables, many XR devices require measurement systems with costly custom optics. There is no one-size-fits-all solution and, once designed, a measurement system is not easily modified for different requirements. The speed of XR innovation calls for equipment that helps manufacturers deploy device-specific display measurement as quickly and easily as possible.

As part of the SPIE AR | VR | MR Technical Talks, Radiant’s paper introduces a patent-pending optical design that greatly simplifies the process of building imaging systems for near-eye display (NED) metrology. Using commercially available modular components, a variety of optical configurations can be produced and, if needed, reconfigured to match unique specifications of most XR headsets with minimal development time. Features such as electronic focus control and folded ('periscope') geometries can be incorporated easily to accommodate different focus ranges and headset form factors.

Radiant’s technical paper and poster presentations will introduce this optical design concept and demonstrate the performance of the modular system for NED measurement using test data and measurement examples.

Metalens imaging simulation in Synopsys BeamProp BPM tool. Credit: Synopsys

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