NED-LMD Near-Eye Display Measurement Systems

The world's most comprehensive test systems to completely characterize augmented reality, virtual reality, mixed reality, and heads-up displays (AR, VR, MR and HUDs) by truly emulating the human eye and conforming to the latest standards being developed by the IEC and SID.

The Product family features the innovative 'Robotic Eye' that uniquely correlates the measurements to a human user for meaningful and hyperspectral, high resolution mapping of the virtual image and qualified viewing space of near-eye displays.

Test Applications for:

  • AR, VR, MR consumer electronics headsets
  • Gaming, entertainment and media devices
  • Industrial, enterprise, education and training displays
  • Healthcare and medical systems
  • Fixed automotive Head-Up displays (HUDs)
  • Helmet-mounted displays (HMD's)
  • Display components

Link To September, 2019 Webcast on the NED-LMD


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High Spatial Resolution, Color & Contrast Measurement

  • Compact size to allow positioning of entrance pupil at the design eye point
  • Small 1 to 5 mm entrance pupil diameter for accurate luminance and color measurement and eye motion box mapping
  • High sensitivity / high dynamic range spectrometer with signal to noise for small and large areas
  • Exceptional color measurement spectral purity
  • Ability to cover over 160 degree FOV with high resolution measurements in the Virtual Image space
  • Precision angular alignment to the device under test
  • Precision mechanical positioning to the design eye point


Measurement Parameters

Luminance and Color Uniformity

Resolution With Eye Position in Qualified Viewing Space


Luminance with Eye Position in Qualified Viewing Space

Pixel / Line Defects

Michelson Contrast and MTF

Display Image Virtual Distance

Design Eye Box Mapping

Field of View

Left / Right Eye Parallax

Field of View Image Distortion

Display Timing Including Response Time, Latency and Motion Artifacts

Types of Errors Associated with Traditional Measurement Approaches 

Pupil Size - Most display spectroradiometers have entrance pupils diameters ranging from 20 to 40 mm.  Proper characterization of near-eye displays requires an entrance pupil  5 mm or smaller, matching that of the human iris. While this reduced entrance pupil greatly improves measurement accuracy, the light measurement system must have sufficient sensitivity and dynamic range to provide adequate signal to noise for both the small and large viewing areas associated with such displays. 

Axis of Rotation - Some near-eye display measurement systems attempt to replicate eye motion using a center of rotation at the pupil. While such an approach is easier to implement, it can significantly misrepresent the actual user experience with an AR, VR or MR headset.  Think about it; as the eye scans left or right, the pupil actually translates left or right, since the center of rotation is at the center of the eyeball. Any measurement system that rotates about the pupil location is omitting information that an actual user will experience, and therefore provides misrepresentative information.  


Over-Emphasis on Camera Pixel Count - Some system manufacturers attempt to imply that more pixels equates to better results.  They're leaving out an important part of the equation though.  The measurement resolution of the system is based on pixels per degree over the field of view.  A 29 MP camera that covers a 120 degree field of view therefore might deliver on the order of 35 pixels of resolution per degree. The NED-LMD GS-E10 series with a high resolution 12 MP camera delivers more than 250 pixels per degree over a 160 degree field of view. 


Comprehensive test solutions for AR/VR/MR/HUD technologies emulating true human eye representation.

The Radiometric Optical Multichannel Analyzer (RadOMA) camera/telescope integral optical head maps display uniformity at vantage point field of view, including luminance, CCT, CIE x,y, peak and dominant wavelength.  An integrated programmable pattern generator displays any 2D / 3D test pattern and outputs in standard VDU formats such as Display Port and HDMI. With automatic scaling to any display resolution, the system supports from synchronous updates for motion artifact analysis.



Auto-focus System for NEW Telescope
  • The Auto focus system includes hardware and software to focus the virtual image. It also determines and reports the virtual image distance, with a focus range of +/- 10 diopters. The virtual image distance is reported in 1 meter increments from 1 to 10 meters and infinity beyond 10 meters.
Dual Field of View Aperture
  • Allows manual selection of either 1 degree of 2 degree aperture for circular area spectroradiometric measurement of the virtual image. Includes the GS-DMS software capability that can automatically select the corresponding calibration file for the aperture selected.

4mm Entrance Pupil Reduction Kit
  • This kit includes a 4mm diameter entrance pupil and field lens system to maintain optimum coupling to the spectroradiometer.

3mm Entrance Pupil Reduction Kit
  • This kit includes a 3mm diameter entrance pupil and field lens system to maintain optimum coupling to the spectroradiometer.

1mm Entrance Pupil Reduction Kit
  • This kit includes a 1mm diameter entrance pupil and field lens system to maintain optimum coupling to the spectroradiometer.

Flicker Sensor Option
  • High speed photosensor in the image plane (5 degrees off axis) allows for the determination of response time and latency characteristics of the display under test.

Response Time Option
  • Software module to acquire and report the response time metrics of the display virtual image. Reports rise time and fall time per ICDM Section 10.2.2. Requires the Flicker sensor option.

Latency Option
  • Software module to acquire and measure the time for the display to respond to an input signal, including any processing-induced latency, or the time for the luminance for the display to turn on from the time it is triggered to do so. The measurement is made from the trigger time until the time the luminance reached 50% of the full luminance at the center of the screen. The reported result is an average over multiple measurements and is reported as the video latency of the display virtual image. Requires the Flicker sensor option. Since the specific configuration of the trigger signal is different for each display technology and video drive signal configuration, engineering evaluation and Factory Quotation for each customer is required.

Related Products

RadOMA GS-1290 spectroradiometers provide a datapoint interval of 0.6 nm and are available in three wavelength ranges:

  • 200 to 800 nm
  • 360 to 1100
  • 200 to 1100 nm
  • 360 to 950 nm


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For the ultimate in resolution and accuracy,  the SpectralLED® Tunable uniform light source incorporates 35 discrete wavelengths for synthesis of commercially available light sources or based on spectra that you import.

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