Electronic Focus for XR Display Testing

Name: Electronic Focus for XR Display Testing
Brand: Radiant Vision Systems, Test & Measurement

The diversity of XR devices and their measurement requirements continue to grow — new display types, fields of view, resolutions, focal distances, form factors, and unique combinations of these elements are constantly emerging. To evaluate the visual quality inside a range of AR, VR, and MR headsets, a much more flexible measurement solution is needed. The XRE Lens from Radiant Vision Systems offers flexibility for evaluating displays as they are seen through an array of headsets and smart glasses. The lens is attached to a high-resolution imaging colorimeter or photometer (45- and 61-megapixel options) for evaluating absolute quantities of brightness, color, and visual integrity as seen by a wearer of a headset. The virtual (zero-hardware) aperture is located beyond the front of the lens to enable flexible positioning of the entrance pupil at the human pupil position in headsets, capturing a complete field of view to 70° (vertical x horizontal).

XR devices continue to incorporate dynamic focus to create a more realistic view of objects near and far — foveated, multifocal, and varifocal optics are becoming more common. At each focal plane, virtual images must appear bright, clear, crisp, and in-focus. With electronic focus designed into the XRE Lens, precise focal distances to be set and adjusted in software to measure multiple focal planes. Focus is changed without manual adjustment to measure visual qualities at any virtual distance. Hands-free focus enables multiple visual analyses to run automatically, with focus settings changed as part of the solution’s automated inspection sequence.

The XRE Lens comes in both folded (“periscope”) and non-folded configuration options to achieve the intended measurement position regardless of headset straps or other headgear. Folded configurations also support two XRE Lens systems in a headset at once for simultaneous dual-eye (stereoscopic) measurement of left and right-eye positions.

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