The illumination of the sample can easily be defined by selecting the illuminant type, the intensity and distribution type (diffuse, collimated).


Based on the above described principle, a diffuse illumination is easily obtained by producing a uniform light distribution in the Fourier plane.


This leads to an independent angular distribution of incoming light on the sample. In the same way, a point source produces a collimated illumination. 

The system self corrects for internal reflections. 




The options for testing under illumination are based on the combination of Fourier Optics, beam splitter and a cooled CCD sensor head.


A suitable light source on the side of the equipment provides the illumination (extended or point source depending on the required illumination type).


An optical relay system combined with a beam-splitter cube enables to conjugate the light source plane with the Fourier plane. The light source distribution function allows to control the angular distribution of illumination.



The lighting through the system can extend up to the viewing cone of the Fourier lens (+/- 80° or +/- 60°).

Equipment compatible with

Reflective Options

EZContrast MS

  The EZContrast Ms series allows very fast spectral data within a large viewing cone. A full spectral map within a +/- 88° viewing angle cone is realised in less than 5mn. Different automated wheels allow selec­tion of...

Learn more ›


    EZContrast series have up to a +/-88 ° angle aperture.   It can measure luminance and color in less than 30 s or spectral data in 5 min, all...

Learn more ›


    The cost effective EZLite-N2 system is the simplest and most versatile instrument for standard viewing angle.   EZLite series are ideal tools, with +/-60° angle aperture. Luminance, color...

Learn more ›