Eine Marke der
Wammes & Partner GmbH
A registered trademark of
Wammes & Partner GmbH

 

Wednesday, 22. February 2012, 20:27 MEZ
Light measurements: Types of measurement

If you have questions about the available types of measurement please contact our experts for a pre- test consultancy. Contact us

By market


Display Technology – backlighting, complete panels
The requirements of the flat panel display performance rely on the display characteristic and the environment of the display and the application. Our purpose it to provide you the most efficient and reliable measurement characterization of visual displays is terms of specific standardization. 
The measurements of flat panel displays are made using our two primary measurement devices: EZContrast and Topcon Bm-7.  Both systems are fully automated and periodically calibrated in order to provide service that exceeds our customer’s expectations.

Automotive Lighting
Automotive lighting characterization is one of the main factors that affects safety and visual comfort of the driver.  The new requirements concerning the illumination of modern spaces and light distribution in terms of colour temperature, contrast, CRI brings urgency to constantly improving materials and technologies. Our facility is ready to perform a light simulation of automotive lighting concepts prior to further measurement approach.

General Lighting
General lighting measurements are mainly focused on interior lighting requirements determined by illuminance level, uniformity, light distribution, glare and the spectrum of the light. Licomet provides different types of optical measurements for wide range of lamp types including incandescent lamps, tungsten halogen lamps, and discharge lamps. 

Portable Lighting
Licomet offers standardized measurement procedures for all those seeking portable lighting solutions including emergency services, car mechanics, highway maintenance and many more. The light simulation and modeling, for most of the well-known portable lighting applications like a hand lamp, string lights or spotlights, is available on request.


By type

Measurements

  • Spectral Radiant Power [µW/nm]
  • Colour coordinates [CIE x, y, z; u’, v’]
  • Correlated Colour temperature (CCT) [Kelvin]
  • Colour Rendering Index (CRI)
  • Reflection colour diffuse and specular illumination
  • Reflection luminance
  • Luminance Level; Brightness [cd/m²;]
  • Luminous flux [lumens]
  • Luminance uniformity
  • Colour uniformity
  • Contrast Ratio
  • Viewing angle performance:
  • Luminance angular dependence
  • Colour angular dependence
  • Contrast Ratio angular dependence
  • Additional visualization of display parameters in terms of viewing angle, cross-sections (azimuth rectangular coordinates, incidence polar coordinates)
  • Efficiency characteristics

Click on the images to enlarge

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Reproducibility of colours : 1976 CIE Chromaticity Diagram

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Polar coordinate system chart

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Reproducibility of colours: 1931 CIE Chromaticity Diagram

 

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1931 CIE Chromaticity Diagram : Colour Dispersion Chart