goniofotometry

Goniofotometry is a field concerned with the measurement of luminous intensity distribution. It involves the systematic measurement of light intensity emitted by a light source in various directions. This is typically achieved using a goniophotometer, an instrument that can rotate the light source or a detector to capture measurements at different angles. The data collected allows for the creation of luminous intensity distribution curves or diagrams, which are essential for understanding how a light source distributes its light in space.

These measurements are crucial in many applications, including lighting design for indoor and outdoor spaces, automotive lighting, and the development of energy-efficient lighting solutions. By analyzing the goniofotometric data, designers can optimize the placement and type of luminaires to achieve desired illumination levels, minimize glare, and ensure uniform light distribution. The output of goniofotometry is often represented in polar coordinates, showing luminous intensity as a function of the angle from a reference direction. Standards organizations, such as the International Commission on Illumination (CIE), provide guidelines and recommend methods for performing and reporting goniofotometric measurements. This standardization ensures comparability and consistency of data across different laboratories and manufacturers.