What is goniophotometry?

Goniophotometry is a technique used to measure the angular distribution of light emitted by a light source. It involves placing the light source at the center of a goniophotometer, which is a device that measures the intensity of light emitted in different directions. The goniophotometer is equipped with a detector that measures the amount of light received at different angles, and the data is used to create a polar diagram of the light source's distribution. This information is used for a variety of applications such as lighting design, energy efficiency assessments, and product development. Goniophotometry can also provide information about the color temperature and color rendering index of the light being produced.