Product Introduction The universal fluorescence quantum efficiency integrating sphere has three openings, namely the light entrance, sample entrance, and light exit entrance. The light entrance port is equipped with a collimating mirror to collimate the excitation light source onto the sample, and the light exit port is equipped with a baffle to prevent the incident light from directly exiting. The commonly used sample port is equipped with a sample colorimetric dish holder, which can be used for measuring samples such as liquids, powders, and films.