Prom VFX set

Prometheus Series
Viewfinder X Spectrometer

3 Apertures 1° ‑ 0.2° ‑ 0.1° spot ⌀ 0.33 mm ‑ 5.3 m

Spectroradiometer with changeable apertures
Working distance range from 0.22 mm to 305 m

Prometheus Viewfinder X Spectrometer Specification

Experience the next level of display characterization with our Prometheus Viewfinder X Spectroradiometer. It's innovative changeable optics feature allows for easy adaption to different measurement requirements, enhancing versatility and precision.

“As versatile as it gets – from close-up, over AR / VR to standard display measurements.”

Electronic viewfinder

The integrated electronic viewfinder uses the established Pritchard-Optics. The resulting camera picture allows easy and quick alignment of the measurement spot. Optionally the camera picture can be stored with the measurement for unmistakable documentation.

Multiple apertures available

The Spectroradiometer comes with a standard lens with adjustable apertures. Here, 1°, 0.2° and 0.1° can be set on the software side. In addition, other optics such as a close-up lens and an AR/VR lens are available which can be controlled fully automatically.

All-in-one device for all measurement tasks

No matter which measurement problem is at the forefront of display characterization, this spectroradiometer is the perfect solution.


  • Standard lens (f = 73.5 mm) and AR/VR tube and close up lens available as addon
  • Spectral range: 360 nm - 830 nm
  • Luminance range:
  • 0.0005 - 10 000 000 cd/m² (1° aperture)
  • 0.005 - 100 000 000 cd/m² (0.1° aperture)
  • 0.0125 - 250 000 000 cd/m² (0.2 ° aperture)
  • Luminance accuracy ± 2 %
  • Color accuracy (x, y) ± 0.002
  • Non-linearity: < ± 0.5 %
  • Spectrometer focal length: 115 mm
  • Spectrometer NA optical bench: 0.10
  • Spectral resolution FWHM: ~ 2.8 nm
  • Wavelength accuracy: ± 0.1 nm
Viewfinder backside highlights

Prometheus Series
Viewfinder X Spectrometer

3 Apertures 1° ‑ 0.2° ‑ 0.1° spot ⌀ 0.33 mm ‑ 5.3 m

About Admesy

World class

Checking the latest stats or texting your mom? Our technology is used during the production of screens, displays, LED applications and consumer electronics of well known market leaders. Our current product portfolio includes spectroradiometers, colorimeters, light meters and 2D imaging colorimeters.

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Made in Europe

Our headquarter is located in the south of the Netherlands, next to the European high tech area of Eindhoven. It is equipped with research & development and production facilities with high-end clean room, ready to meet your needs. Still, with offices in Europe and Asia and a worldwide network of distributors, we are always close.

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Clever minds

We continuously follow the latest standards and recommendations to enable the industry to respond immediately. On both large and small scale, we have proven our strength and ability to serve any customer offering configurational flexibility tailored to their specific measurement needs in production lines and R&D labs.

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