XRE Lens

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The variety of AR/VR/MR (augmented, virtual, and mixed/merged reality, collectively “XR”) devices is exploding, from immersive VR headsets to industrial MR goggles and sleek AR smart glasses. Radiant’s XRE Lens offers two configuration options, folded (“periscope”) and non-folded, enabling it to be used to inspect a wide range of near-eye devices and integration requirements. The XRE lens also features automated electronic focus that enables focus to be controlled via software for rapid adjustment and accurate testing of through-focus MTF. It has an FOV of ± 35° and works with Radiant high-resolution imaging colorimeters and photometers. Radiant’s XRE Lens solution offers several advantages:

  • Advanced software algorithms that use focal settings to measure size and position to determine object “distance” in real-world measurements without the need for focal depth calculation.
  • Light and color accuracy measurements to determine accurate brightness (highlights or shadows) in respect to the environment, contributing to the projection’s visibility.
  • Evaluation against defined tolerances for luminance, color, and spatial offset. You can accurately determine an artificial object’s location, depth, and size.
  • Library of tests and patterns such as checkerboard patterns to measure slant edge contrast or modulation transfer function (MTF) to ensure object clarity.

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  • Designed for in-headset display evaluation including measurement of photometric values
  • Electronic focus for focus setting and adjustment from software
    • No manual adjustment needed for each focus change
    • Enables fully automated Through-Focus MTF testing
  • Entrance pupil (aperture) in front of lens to simulate human eye position
  • Virtual aperture (3.3 mm) enables flexible positioning at various eye relief distances
  • System FOV up to ±35° (70° total)
  • Pairs with high-resolution ProMetric imaging colorimeters and photometers
  • Easy-to-use measurement control and analysis software


Parameter XRE Lens
Primary Application Light and color measurement for near-eye displays (NED) in headsets
Effective Aperture 3.3 mm*
Focus Electronic
Focus Distance** Range 0.5 m to infinity
Minimum Inter-Pupillary Distance (IPD) 63 mm
Fold Length of Optional Fold Mirror 173 mm
Luminance – Minimum 0.01 cd/m2
Luminance – Maximum*** 10,000 cd/m2 (Y-series); 1,000,000 cd/m2 (I-series)
Measurement Capabilities**** Luminance, Radiance, CIE Chromaticity Coordinates, Correlated Color Temperature (CCT)
Units**** cd/m2, nit, W/sr/m2, foot-lambert, CIE (x, y) and (u’, v’), Kelvin (CCT)
Paired with Camera ProMetric I29 ProMetric Y45 ProMetric Y61, I61, I61-SC
Approximate Field of View
±35° ±35° ±35°
Approximate Field of View
±35° ±28° ±35°
Resolution 0.017° / sensor pixel 0.010° / sensor pixel 0.012° / sensor pixel

* Contact Radiant for relevant drawings.
** Measured from front of lens.
**Maximum luminance is for 1 ms.
**** Color measurement available with I-series cameras only.
Specifications subject to change without notice.


Compatible Products:

  • ProMetric Y Series Photometers: Y45, Y61
  • ProMetric I Series Colorimeters: I29, I61, I61-SC

System Recommendations:

  • ProMetric Imaging Photometer or Colorimeter (29MP, 45MP or 61MP)
  • TT-ARVR™ Software module
  • Windows® 10, 64 bit
  • 16-32 GB RAM
  • Additional system requirements vary by camera.

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