The CAL4 is designed for measuring resolution, color, OECF, dynamic range and noise when using an endoscopic light source.
The 0,3m integrating sphere provides a uniform illumination over the 50 mm chart plane. Simply connect the integrating sphere with the endoscopies (light projector) light source, to a fiber optic cold light cable, by using one of the four adapters that are compatible with the most common light projectors.