Integrating sphere

Having a highly reflective inner surface of hollow sphere.
Used in ball or on the ball and close at a window of the sample light scattering or emission of a high-efficiency device for collecting.
The ball on the small window allows light to enter and spaced closer together with the detector.
The integrating sphere known as the lumen ball is a complete hollow spherical shells.
The wall coated with a white diffuse reflection layer, and the balls of each point of the inner wall diffusing uniform. The wall of the ball, the light source S optionally the intensity of illumination is generated on the point B is the superposition of multiple reflected light illumination.