Spectrometer measurements

Particularly in the context of the increasing application of LED luminaires, spectral measurements are becoming more and more important. Standards concerning the measurement of LEDs (LM79, EN13032-4), focus on the measurement of spectral characteristics.

All RiGO801 goniophotometer models can be equipped with a spectrometer so as to fit the measurement of spectral characteristics. In such a case, the RiGO801 measurement program will be upgraded by a spectrometer software module.

spectrometer software module for RiGO801 measuring software
automatic measurement of spectra on a configurable position list
calculation of spectral characteristics according to LM79 and EN13032-4
visualization of the spectra
visualization in the CIE 1931 color space chromaticity diagram
output in various file formats

The irradiance measuring head of the spectrometer is mounted next to the camera under a known offset angle and coupled to the spectrometer by means of a optical fibre.

The spectrometer measurement is done separately to the measuring of the ray data and the luminous intensity distribution by using the RiGO801 spectrometer software module. The spectrometer is positioned corresponding to a position list and at each position a measurement is permormed.

Chromacity coordinates in the chromaticity diagram (detail)

For each measurement derived quantities are calculated (chromacity coordinates, color temperature, CRI, dominant wavelength, ...) and for the total measurement, the average color coordinates corresponding to LM79 and EN13032-4 are calculated. Being Visualized are the spectra as well as the chromacity coordinates in the chromaticity diagram.