Separation into blue and yellow spectral range
Spectral ray data
For the physically correct simulation of dispersion effects, ray data must be spectrally resolved. As it is not possible to acquire image-resolved spectral data at reasonable expense (hyperspectral camera), the whole spectral range is split up into some few ranges by means of suitable spectral filters. For these ranges, ray data are measured separately, and spectral ray functions are assigned. This approach has proved to be successful particularly in the case of white LEDs.
RiGO801 goniophotometers can be equipped with a filter wheel camera (equipment with color filter set or according to customer requirements), thus making sure that the multichannel measurement runs automatically. Otherwise, externally mounted filters ca be used.