The integrating sphere has an internal diameter of 30 mm and has a surface covered with Baryum sulfate to diffuse light. The sphere allows to capture and homogenize total flux emitted by light.
The input of the sphere has a 7 mm diameter. The sphere is directly connected to the Probe4Light system..
A version of the integrating sphere has a small spout at the input in order to reduce straight light and realize measurement in a precise direction.