Photometric laboratory
Light measurement according to CIE

Our lighting laboratory offers you the latest lighting measurement techniques according to the CIE requirements. The measurement devices especially designed for the measurement of LEDs.

A verification of data sheets for the measurements of LEDs is in the pulse mode possible. Furthermore LEDs from different producers can be compared.

Measurement of UV (350nm), over visible, to IR (1100nm) LEDs.

The following parameters for LEDs can be measured and evaluated by us:

Luminous flux
Measured in lumen (lm), determines the brightness of a light source in a 3-dimensioned room.
Luminous intensity
Luminous flux/dihedral angle, measured in a candela (cd), indicates how bright a light source illuminates in a certain direction.
Efficiency
Luminous flux/Area, measured in LUX (lx) determines how bright an area is illuminated.
CRI
Color rendering index describing the quality of color reproduction of light sources of the same correlated color temperature.
Colour temperature
CCT / Measured in Kelvin, gives the color impression of the light again from cold white to warm white
Chromaticity coordinate
x, y coordinates determine the position of the color temperature in the CIE -XYZ color space
Wavelength
The wavelengths of visible light, lies between 380nm and 780nm.
Viewing angle
In degrees, describes the angle at which the light leaves the light source, usually defining the emission angle as FWHM
Beam type
Is the directional release of the light of a light
Spectrum
Weighted distribution of light over the wavelength range of the total electromagnetic radiation

Spectral light distribution

Spectra

Directional characteristic of a LED with optic

Equipment

High-solution spectroradiometer
- CCD Array 1024 x 128
- Range of wavelength-measurement: 350 - 1100nm (UV- / vis- / IR-range)
- Integration time 9ms - 60s
Measurement parameters:
- Color coordinates (x, y / u′, v′)/ Color temperature
- CRI (Ra, Ri (i= 1 - 14))
- o Relative spectral light distribution P (λ)
- luminous flux, luminous power
30/100cm integrating sphere
Light- and radiation-measuring device for measurement of luminous intensity in cd or mW/sr, according to requirements after CIE127
Goniophotometer for measurement of radiation characteristics of LEDs and optics
- Angle resolution of 0.1°
- Luminous intensity of 10mcd-200cd measurable in a CIE class A photometer

Offers

Package A

Spectrum, luminous flux, CRI, Peak and dominant wavelength, color temperature and color coordinates of one LED, operated on: rated current, current in the application, and maximum current.

Example of a test report

Package B

Radiation characteristics, intensity/ angle in x- and y-direction each ±90°

Example of a test report

Combipackage

Measurements of Package A and Package B for the same LED

Any questions?

We are happy to answer your questions and advise you with our many years of experience in choosing the right package.

☎ +49 9135 7366665

Photometric laboratory Light measurement according to CIE

The following parameters for LEDs can be measured and evaluated by us:

Package A

Package B

Combipackage

Photometric laboratory
Light measurement according to CIE